{"title":"PAR Meters \u0026 Grow Light Meters","description":"\u003cp\u003ePAR meters are essential tools for growers who want to properly measure usable plant light rather than guessing from wattage, hanging height or manufacturer charts. A quality PAR meter measures photosynthetically active radiation, helping you understand how much light is actually reaching your canopy.\u003c\/p\u003e\n\n\u003cp\u003eWhether you are setting up LED grow lights, checking uniformity across a grow tent, comparing fixture output or dialling in PPFD levels through veg and flower, a PAR meter gives you real data you can act on. This makes it much easier to avoid weak growth from low light, light stress from excessive intensity and uneven canopy performance caused by poor fixture placement.\u003c\/p\u003e\n\n\u003ch2\u003ePAR Meters For Accurate Grow Light Measurement\u003c\/h2\u003e\n\n\u003cp\u003eAt The Hydro Bros, our range of PAR meters and light meters is selected for growers who want accurate, repeatable readings in real grow rooms. These meters help you measure PPFD, map your canopy and fine-tune your lighting setup for stronger, more consistent plant growth.\u003c\/p\u003e\n\n\u003cp\u003ePAR meters are especially useful when upgrading to modern LED grow lights, where visual brightness can be misleading. By measuring the actual light available to your plants, you can set the correct hanging height, adjust dimmer levels and improve coverage across the full growing area.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Use A PAR Meter?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMeasure usable plant light at canopy level\u003c\/li\u003e\n  \u003cli\u003eDial in PPFD for veg, flower and propagation\u003c\/li\u003e\n  \u003cli\u003eCheck grow light coverage and uniformity\u003c\/li\u003e\n  \u003cli\u003eAvoid light stress, bleaching and wasted energy\u003c\/li\u003e\n  \u003cli\u003eCompare LED fixture performance accurately\u003c\/li\u003e\n  \u003cli\u003eOptimise light height and dimmer settings\u003c\/li\u003e\n  \u003cli\u003eImprove consistency across your grow space\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eShop PAR Meters \u0026amp; Grow Light Meters\u003c\/h2\u003e\n\n\u003cp\u003eExplore our collection of PAR meters, PPFD meters and grow light measurement tools to take the guesswork out of lighting. If you are unsure which meter is best for your setup, contact The Hydro Bros and we will help you choose the right option for your grow room, tent or commercial environment.\u003c\/p\u003e","products":[{"product_id":"apogee-mq-610-epar-meter","title":"Apogee MQ-610 ePAR Meter + Wand","description":"\u003cp\u003eKnow your PPFD! The Apogee MQ610! \u003c\/p\u003e\n\u003cp\u003eComes as standard with the extension wand to attach the sensor, and also an option of a protective case (with foam lining).\u003c\/p\u003e\n\u003cp\u003eThe MQ610 is Apogee's newest, cutting-edge ePAR sensor created in 2021, as an upgrade to the MQ620. If you want to dial in your grows, the Apogee meter will optimise and maximise the potential of your lights. Forget about watts (the input), it is actually the output that should be measured - this is PPFD (photon synthetic flux density) is the true measure of light that plants need.\u003c\/p\u003e\n\u003cp\u003eThe ePFD sensor is designed to measure the newly defined 400 – 750 nm ePAR radiation range that research has shown to be photosynthetically active, beyond the traditional 400-700 nm range. PPFD (photon synthetic flux density) is the true measure of light that plants need.\u003c\/p\u003e\n\u003cp\u003eCheck out our \u003ca href=\"https:\/\/www.thehydrobros.com\/post\/led-buyer-guide-part-2-forget-about-watts\" target=\"_blank\" rel=\"noopener noreferrer\"\u003earticle here\u003c\/a\u003e for more info Apogee is led by Crop Physiology Professor (uber plant scientist), Bruce Bugbee (google him!). Apogee leads the field, set the standard, and create these instruments used by scientists the world over.\u003c\/p\u003e\n\u003cp\u003eThe MQ-610 quantum meter (AKA par meter) is the tool of choice for professionals and scientists all over the world. Accurately measuring photosynthetically active radiation (PAR) from all light sources. It has a hand-held meter, attached via cable, that displays and stores measurements.\u003c\/p\u003e\n\u003cp\u003eThe sensor incorporates a blue-enhanced silicon photodiode and custom optical filters with a rugged, self-cleaning sensor housing design, anodized aluminium body with an acrylic diffuser.\u003c\/p\u003e\n\u003cp\u003eWith this tool, you can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room. The meter has a sample and log mode and will record an integrated daily total in mol m-2 d-1.\u003c\/p\u003e\n\u003cp\u003eSample mode will record up to 99 manual measurements. Log mode will power the meter on\/off to make a measurement every 30 seconds. Every 30 minutes the meter will average the sixty 30 second measurements and record the averaged value to memory.\u003c\/p\u003e\n\u003cp\u003eThe meter can store up to 99 averages, once full it will start to overwrite the oldest measurement with new ones. A Daily Light Integral will be recorded from the 48 averaged measurements (making a 24 hr period). Sample and log measurements can be reviewed on the LCD display or by downloading the data to a computer, however, the integrated daily total can only be viewed by downloading the data to a computer.\u003c\/p\u003e\n\u003cp\u003eDownloading data to a computer requires the AC-100 communication cable (a standard USB cable will not work) and ApogeeAMS software. NOT INCLUDED\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Without Protective Case","offer_id":40421104844984,"sku":"4982","price":599.0,"currency_code":"GBP","in_stock":true},{"title":"With Protective Case +£35","offer_id":40421104877752,"sku":"4983","price":795.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-mq-610-epar-meter-29226511761592.png?v=1780147884"},{"product_id":"apogee-mq-500-par-meter","title":"Apogee MQ-500 PAR Meter + Wand","description":"\u003cp\u003eKnow your PPFD! The Apogee MQ500!\u003c\/p\u003e\n\u003cp\u003eComes as standard with the extension wand to attach the sensor, and also an option of a protective case (with foam lining).\u003c\/p\u003e\n\u003cp\u003eThe MQ500 is Apogee's flagship and the industry's standard. If you want to dial in your grows, the Apogee meter will optimise and maximise the potential of your lights. Forget about watts (the input), it is actually the \u003cem\u003eoutput\u003c\/em\u003e that should be measured - this is PPFD (photon synthetic flux density) is the true measure of light that plants need.\u003c\/p\u003e\n\u003cp\u003eThe sensor is designed to measure the scientifically recognised photosynthetically active range of 400-700 nm.\u003c\/p\u003e\n\u003cp\u003eCheck out our \u003ca href=\"https:\/\/www.thehydrobros.com\/post\/led-buyer-guide-part-2-forget-about-watts\" target=\"_blank\" rel=\"noopener noreferrer\"\u003earticle here\u003c\/a\u003e for more info Apogee is led by Crop Physiology Professor (uber plant scientist), Bruce Bugbee (google him!). Apogee leads the field, set the standard, and create these instruments used by scientists the world over.\u003c\/p\u003e\n\u003cp\u003eThe Apogee quantum meters(AKA par meter) are the industry standard and tool of choice for professionals and scientists all over the world. Accurately measuring PPFD from all light sources. The MQ500 is a hand-held meter, attached via cable, that displays and stores measurements.  The wand extends so you can get to those harder to reach places in your grow room.\u003c\/p\u003e\n\u003cp\u003eWith this tool, you can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room. The meter has a sample and log mode and will record an integrated daily total in mol m-2 d-1.\u003c\/p\u003e\n\u003cp\u003eSample mode will record up to 99 manual measurements. Log mode will power the meter on\/off to make a measurement every 30 seconds. Every 30 minutes the meter will average the sixty 30 second measurements and record the averaged value to memory.\u003c\/p\u003e\n\u003cp\u003eThe meter can store up to 99 averages, once full it will start to overwrite the oldest measurement with new ones. A Daily Light Integral will be recorded from the 48 averaged measurements (making a 24 hr period). Sample and log measurements can be reviewed on the LCD display or by downloading the data to a computer, however, the integrated daily total can only be viewed by downloading the data to a computer.\u003c\/p\u003e\n\u003cp\u003eDownloading data to a computer requires the AC-100 communication cable (a standard USB cable will not work) and ApogeeAMS software. NOT INCLUDED\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Without Protective Case","offer_id":40421099438264,"sku":"4981","price":575.0,"currency_code":"GBP","in_stock":true},{"title":"With Protective Case +£35","offer_id":40421099405496,"sku":"4980","price":765.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-mq-500-par-meter-29226514710712.png?v=1780147885"},{"product_id":"apogee-aa-100-protective-carry-case","title":"Apogee AA-100 Protective Carry Case","description":"\u003cp\u003eProtect your equipment!\u003c\/p\u003e\n\u003cp\u003eProtective carrying case designed to transport and store Apogee meters, sensors, and accessories. This case will fit a meter and the telescopic lance no problem.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWeight:2 lbs\u003c\/li\u003e\n\u003cli\u003eWidth: 10.5\"\u003c\/li\u003e\n\u003cli\u003eHeight: 6.5\"\u003c\/li\u003e\n\u003cli\u003eDepth: 3\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"APOGEE","offers":[{"title":"Default Title","offer_id":42147258237143,"sku":"5640","price":35.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-aa-100-protective-carry-case-36278825713879.jpg?v=1780156354"},{"product_id":"apogee-mq-510-par-meter","title":"Apogee MQ-510 PAR Meter + Wand","description":"\u003cp\u003eFor those underwater biologists, this Apogee meter is exactly like the MQ-500, but can be used underwater.  \u003c\/p\u003e\n\u003cp\u003eComes as standard with the extension wand to attach the sensor, and also an option of a protective case (with foam lining).\u003c\/p\u003e\n\u003cp\u003eThe MQ-510 quantum meter is designed for underwater PAR measurements and already applies the sensor's immersion effect correction factor to the meter readings through firmware. The meter provides excellent measurements under all light sources, including LEDs. The meter consists of a waterproof quantum sensor attached via waterproof cable to a handheld meter. The waterproof sensor incorporates a blue-enhanced silicon photodiode and custom optical filters with a rugged, anodized aluminum body with acrylic diffuser. The underwater quantum sensor is typically used in saltwater aquariums where corals are grown.\u003cstrong\u003e Note: The handheld meter is not waterproof, only the sensor. cable and the A320 telescopic lance (this lance is different to that included with other models) are waterproof.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/MQ-510-spec-sheet.pdf?v=1643413656\"\u003eSpecification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/MQ-510-manual.pdf?v=1643413656\"\u003eMQ-510 Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eComes with the option of a 5\" x 8\" x 1\" zippered neoprene pouch for safely storing Apogee meters, microCache devices, and sensors and is water-resistant. The extendable wand is included for you to attach the sensor to.\u003c\/p\u003e\n\u003cp\u003eModelled against the MQ500 Apogee's flagship and industry's standard. The Apogee meter will optimise and maximise the potential of your lights. Forget about watts (the input), it is actually the \u003cem\u003eoutput\u003c\/em\u003e that should be measured - this is PPFD (photon synthetic flux density) is the true measure of light that plants need.\u003c\/p\u003e\n\u003cp\u003eThe sensor is designed to measure the scientifically recognised photosynthetically active range of 400-700 nm.\u003c\/p\u003e\n\u003cp\u003eThe Apogee quantum meters(AKA par meter) are the industry standard and tool of choice for professionals and scientists all over the world. Accurately measuring PPFD from all light sources. The MQ500 is a hand-held meter, attached via cable, that displays and stores measurements.  The wand extends so you can get to those harder to reach places in your grow room.\u003c\/p\u003e\n\u003cp\u003eThe MQ-510 performs exactly the same underwater as the MQ-500, but the MQ-510 simply multiplies the PAR reading by 1.32 to account for the immersion effect. The MQ-510 is a full-spectrum quantum sensor (SQ\/MQ-500 Series) with a spectral range of 389 to 692 nm ± 5 nm, which can be seen in the graph below. This improved spectral response of this meter increases the accuracy of LED measurements compared to our original models.\u003c\/p\u003e\n\u003cp\u003eSample mode will record up to 99 manual measurements. Log mode will power the meter on\/off to make a measurement every 30 seconds. Every 30 minutes the meter will average the sixty 30 second measurements and record the averaged value to memory.\u003c\/p\u003e\n\u003cp\u003eThe meter can store up to 99 averages, once full it will start to overwrite the oldest measurement with new ones. A Daily Light Integral will be recorded from the 48 averaged measurements (making a 24 hr period). Sample and log measurements can be reviewed on the LCD display or by downloading the data to a computer, however, the integrated daily total can only be viewed by downloading the data to a computer.\u003c\/p\u003e\n\u003cp\u003eDownloading data to a computer requires the AC-100 communication cable (a standard USB cable will not work) and ApogeeAMS software. NOT INCLUDED\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Without Protective Case","offer_id":42347623874775,"sku":"5809","price":750.0,"currency_code":"GBP","in_stock":true},{"title":"With Protective Case + £35","offer_id":42347623907543,"sku":"5810","price":785.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-mq-510-par-meter-36539894333655.png?v=1780156433"},{"product_id":"apogee-dli-500-par-meter","title":"Apogee DLI-500 PAR Meter","description":"\u003cp\u003eMEASURES BOTH PPFD AND DLI!\u003c\/p\u003e\n\u003cp\u003eKnow your PPFD! The Apogee quantum meters (AKA par meter) are the industry standard and tool of choice for professionals and scientists all over the world. Accurately measuring PPFD from all light sources.  For those looking to dial in their grows, you need a good quality par meter...and Apogee is the king of meters and the choice of all the professionals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the DLI-500?\u003c\/strong\u003e A handheld all-in-one sensor and meter that captures PPFD within the full photosynthetic 400-700 nm range under all light sources. Gives both a spot reading and the Daylight Integral (DLI). \u003cstrong\u003e \u003c\/strong\u003eThe ¼-20 threaded on the bottom can be used used to secure the meter in place and ensure consistent measurements. The mount also allows the use of the most commercially available camera mounts, tripods, and various stakes. The DLI meter comes with a yellow soil stake for easy, immediate deployment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between PAR and ePAR?\u003c\/strong\u003e PAR stands for Photosynthetic Active Radiation, which is the range defined back in the 1970s accepted as the range within the colour spectrum of light that plants use to photosynthesise. Fast forward to today, and studies have shown that far reds actually contribute to the rate of photosynthesis. Thus, the traditional range of 400-700, and technically then, we're under measuring the PPFDs that plants use to photosynthesis when measuring traditional 400-700nm. However, 400-700 is the scientific standard and is used by all light manufacturers when they provide PPFD readings.  Won't be long though that they move to the ePAR range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is DLI?\u003c\/strong\u003e DLI refers to the total amount of PAR or extended PAR (ePAR) during a 24-hour period, expressed in units of moles per square meter per day (mol m-2 d-1). To translate that to English(!), DLI is a measure of the TOTAL amount of light the plants are getting in a 24hr period, as opposed to the single spot PPFD reading. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between DLI-500 and the MQ500?\u003c\/strong\u003e The DLI-500 can capture the DLI data that can be downloaded via a normal simple USB-C cable.  The form factor: The\u003ca href=\"https:\/\/www.thehydrobros.com\/products\/apogee-mq-500-par-meter\"\u003e MQ-500\u003c\/a\u003e has a separate meter and sensor which can get into harder to reach areas, whereas the DLI-500 is all-in-one, whilst giving the same precise scientific accuracy as the MQ-500, which comes in cheaper as there are fewer components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it used? \u003c\/strong\u003eYou can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room.  Plants don't care how many watts you throw in your light..it's the quantity (number of umoles) and the quality (spectrum) output of the light that matters. Growers looking to dial it in, should be looking at the PPFD of their light relative to the number of watts (and of course the cost of the light).\u003c\/p\u003e\n\u003cp\u003eIn summary, Forget about watts (the input), it is actually the \u003cem\u003eoutput\u003c\/em\u003e that should be measured - this is PPFD (photon synthetic flux density) is the true measure of light that plants need.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's in the box? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDLI-500\u003c\/li\u003e\n\u003cli\u003eCarry case\u003c\/li\u003e\n\u003cli\u003eMini mounting stake\u003c\/li\u003e\n\u003cli\u003eQuick Start Guide\u003c\/li\u003e\n\u003cli\u003e2 x AA Batteries\u003c\/li\u003e\n\u003cli\u003eUSB-C Cable\u003c\/li\u003e\n\u003cli\u003eMini screwdriver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/DLI-400-500-600-Manual.pdf?v=1644338943\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eApogee DLI-500 Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/DLI-400-500-600-spec-sheet.pdf?v=1644338943\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eApogee DLI-500 Technical Specs\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eWith this tool, you can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room.  Plants don't care how many watts you throw in your light..it's the quantity (number of umoles) and the quality (spectrum) output of the light that matters. Growers looking to dial it in should be looking at the PPFD of their light relative to the number of watts (and of course the cost of the light).\u003c\/p\u003e\n\u003cp\u003eCheck out our \u003ca href=\"https:\/\/www.thehydrobros.com\/post\/led-buyer-guide-part-2-forget-about-watts\" target=\"_blank\" rel=\"noopener noreferrer\"\u003earticle here\u003c\/a\u003e for more info Apogee is led by Crop Physiology Professor (uber plant scientist), Bruce Bugbee (google him!). Apogee leads the field, set the standard, and create these instruments used by scientists the world over.\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Default Title","offer_id":42386133156055,"sku":"5919","price":630.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-dli-500-par-meter-36602025967831.png?v=1780156458"},{"product_id":"apogee-dli-600-par-meter","title":"Apogee DLI-600 PAR Meter","description":"\u003cp\u003eMEASURES BOTH PPFD AND DLI!..\u003c\/p\u003e\n\u003cp\u003eKnow your PPFD! The Apogee quantum meters (AKA par meter) are the industry standard and tool of choice for professionals and scientists all over the world. Accurately measuring PPFD from all light sources.  For those looking to dial in their grows, you need a good quality par meter...and Apogee is the king of meters and the choice of all the professionals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the DLI-600?\u003c\/strong\u003e A handheld all-in-one sensor and meter that captures PPFD beyond the classic full photosynthetic range (400-700 nm) with the emerging 400 - 750nm (aka ePAR) under all light sources. Gives both a spot reading and the Daylight Integral (DLI). \u003cstrong\u003e \u003c\/strong\u003eThe ¼-20 threaded on the bottom can be used used to secure the meter in place and ensure consistent measurements. The mount also allows the use of most commercially available camera mounts, tripods, and various stakes. The DLI meter comes with a yellow soil stake for easy, immediate deployment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between PAR and ePAR?\u003c\/strong\u003e PAR stands for Photosynthetic Active Radiation, which is the range defined back in the 1970s accepted as the range within the colour spectrum of light that plants use to photosynthesise. Fast forward to today, and studies have shown that \u003cem\u003efar reds actually contribute to the rate of photosynthesis\u003c\/em\u003e. Thus, the traditional range of 400-700, and technically then, we're under measuring the PPFDs that plants use to photosynthesis when measuring traditional 400-700nm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is DLI?\u003c\/strong\u003e DLI refers to the total amount of PAR or extended PAR (ePAR) during a 24-hour period, expressed in units of moles per square meter per day (mol m-2 d-1). To translate that to English(!), DLI is a measure of the TOTAL amount of light the plants are getting in a 24hr period, as opposed to the single spot PPFD reading. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between DLI-600 and the MQ610?\u003c\/strong\u003e The DLI-600 can capture the DLI data that can be downloaded via a normal simple USB-C cable.  The form factor: The \u003ca href=\"https:\/\/www.thehydrobros.com\/products\/apogee-mq-610-epar-meter?variant=40421104844984\"\u003eMQ-610\u003c\/a\u003e has a separate meter and sensor which can get into harder to reach areas, whereas the DLI-600 is all-in-one, whilst giving the same precise scientific accuracy as the MQ-610, which comes in cheaper as there are fewer components.  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it used? \u003c\/strong\u003eYou can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room.  Plants don't care how many watts you throw in your light..it's the quantity (number of umoles) and the quality (spectrum) output of the light that matters. Growers looking to dial it in, should be looking at the PPFD of their light relative to the number of watts (and of course the cost of the light).\u003c\/p\u003e\n\u003cp\u003eIn summary, Forget about watts (the input), it is actually the \u003cem\u003eoutput\u003c\/em\u003e that should be measured - this is PPFD (photon synthetic flux density) is the true measure of light that plants need.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's in the box? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDLI-600\u003c\/li\u003e\n\u003cli\u003eCarry case\u003c\/li\u003e\n\u003cli\u003eMini mounting stake\u003c\/li\u003e\n\u003cli\u003eQuick Start Guide\u003c\/li\u003e\n\u003cli\u003e2 x AA Batteries\u003c\/li\u003e\n\u003cli\u003eUSB-C Cable\u003c\/li\u003e\n\u003cli\u003eMini screwdriver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/DLI-400-500-600-Manual.pdf?v=1644338943\" target=\"_blank\"\u003eApogee DLI-600 Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/files\/DLI-400-500-600-spec-sheet.pdf?v=1644338943\" target=\"_blank\"\u003eApogee DLI-600 Technical Specs\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eWith this tool, you can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room.  Plants don't care how many watts you throw in your light..it's the quantity (number of umoles) and the quality (spectrum) output of the light that matters. Growers looking to dial it in should be looking at the PPFD of their light relative to the number of watts (and of course the cost of the light).\u003c\/p\u003e\n\u003cp\u003eCheck out our \u003ca href=\"https:\/\/www.thehydrobros.com\/post\/led-buyer-guide-part-2-forget-about-watts\" target=\"_blank\"\u003earticle here\u003c\/a\u003e for more info Apogee is led by Crop Physiology Professor (uber plant scientist), Bruce Bugbee (google him!). Apogee leads the field, set the standard, and create these instruments used by scientists the world over.\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Default Title","offer_id":42386193187031,"sku":"5920","price":670.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-dli-600-par-meter-36602127122647.png?v=1780156458"},{"product_id":"apogee-ac-100-communications-cable","title":"Apogee AC-100 Communications Cable","description":"\u003cp\u003eThe AC-100 cable is required to download data recorded in Apogee handheld meters to a computer.\u003c\/p\u003e\n\u003cp\u003eThe cable houses electronics to convert the signal from the meter into a USB signal that a computer recognizes. The ApogeeAMS software (Windows compatible, XP and later; Mac compatible, 10.10 and later) used to interface Apogee meters with a computer is included on a flash drive or can be downloaded \u003ca href=\"https:\/\/www.apogeeinstruments.com\/downloads\/\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Default Title","offer_id":42636759040215,"sku":"6377","price":85.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-ac-100-communications-cable-36932211704023.png?v=1780156559"},{"product_id":"apogee-pq-612-epar-sensor","title":"Apogee PQ-612 ePAR Sensor","description":"\u003cp\u003eForget about watts (the input), it is actually the \u003cem\u003eoutput\u003c\/em\u003e that should be measured - this is PPFD (photon synthetic flux density) is the true measure of light that plants need. Know your PPFD! \u003c\/p\u003e\n\u003cp\u003eThis bundle is for those wanting to use their phone to read, monitor, measure and see PPFD reports within the Extended Photosynthetically Active Radiation (ePAR) sensor (this is between 400-750nm)!\u003c\/p\u003e\n\u003cp\u003eThis kit comes with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSQ-610-SS (ePAR) sensor including a 30 cm cable\u003c\/li\u003e\n\u003cli\u003ea microCache Bluetooth micro-logger\u003c\/li\u003e\n\u003cli\u003ean AA-090 protective Neoprene Case\u003c\/li\u003e\n\u003cli\u003ean extra 2545 microCache battery\u003c\/li\u003e\n\u003cli\u003eand an AM-020 Apogee PVC Sensor Platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe extended 2 meter cable of the SS2 model allows the microCache to be positioned further from the sensor. When paired, these two devices are a powerful tool for monitoring total photon flux intensity with research-grade accuracy for optimal specimen growth. \u003c\/p\u003e\n\u003cp\u003eThe new SQ-610 ePAR was created in 2021 to measure the newly defined 400-750 nm ePAR radiation range that emerging research is showing to be photosynthetically active beyond the traditional 400-700 nm range.\u003c\/p\u003e\n\u003cp\u003eThe new AT-100 microCache (µCache) micro-logger is a rugged, standalone, battery-powered device that can collect over 400,000 data points and connects your sensor to your iOS or Android device via Bluetooth using our free ApogeeConnect app. The app allows you to make real-time measurements, set custom datalogging intervals, monitor and graph daily lights integrals, assure photoperiods, download datasets, and more.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eView Real-time Data\u003c\/li\u003e\n\u003cli\u003eTransmits real-time data to iOS and Android devices using the Apogee Connect app.\u003c\/li\u003e\n\u003cli\u003eRugged Housing\u003c\/li\u003e\n\u003cli\u003eIP67 rated for harsh environments.\u003c\/li\u003e\n\u003cli\u003eDatalogging Mode\u003c\/li\u003e\n\u003cli\u003eStores over 400,000 entries, (9 months of 1-minute data) with programmable sampling and logging intervals.\u003c\/li\u003e\n\u003cli\u003eHigh Resolution Readings\u003c\/li\u003e\n\u003cli\u003eProcessor features a 24 bit analog-to-digital converter.\u003c\/li\u003e\n\u003cli\u003eWarranty and Support\u003c\/li\u003e\n\u003cli\u003eThe µCache is backed by a 4 year warranty and outstanding customer support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Apogee\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Apogee quantum meters (AKA par meter) are the industry standard and tool of choice for professionals and scientists all over the world. Accurately measuring PPFD from all light sources.  For those looking to dial in their grows, you need a good quality par meter...and Apogee is the king of meters and the choice of all the professionals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Do I Need This?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe get it, it's not cheap and definitely not a day 1 purchase for a grower just starting out!  However, once you've got the environment dialled in, look into dialling in the output of your lights. Plants don't care how many watts you throw in your light..it's the quantity (number of umoles) and the quality (spectrum) output of the light that matters. Growers looking to dial it in should be looking at the PPFD of their light relative to the number of watts (and of course the cost of the light).\u003c\/p\u003e\n\u003cp\u003eWith this tool, you can accurately measure the PPFD over your plant canopy and ensure you hit that sweet spot of 600-900 PPFD (numbers based on current science literature). PPFD of 1000+ will require the use of supplemental CO2 in your grow room.  \u003c\/p\u003e\n\u003cp\u003eCheck out our \u003ca href=\"https:\/\/www.thehydrobros.com\/post\/led-buyer-guide-part-2-forget-about-watts\" target=\"_blank\" rel=\"noopener noreferrer\"\u003earticle here\u003c\/a\u003e for more info Apogee is led by Crop Physiology Professor (uber plant scientist), Bruce Bugbee (google him!). Apogee leads the field, set the standard, and create these instruments used by scientists the world over.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between PAR and ePAR?\u003c\/strong\u003e PAR stands for Photosynthetic Active Radiation, which is the range defined back in the 1970s accepted as the range within the colour spectrum of light that plants use to photosynthesise. Fast forward to today, and studies have shown that \u003cem\u003efar reds actually contribute to the rate of photosynthesis\u003c\/em\u003e. Thus, the traditional range of 400-700, and technically then, we're under measuring the PPFDs that plants use to photosynthesis when measuring traditional 400-700nm.\u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Default Title","offer_id":43311282651351,"sku":"7155","price":800.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-pq-612-epar-sensor-38006662299863.png?v=1679578850"},{"product_id":"apogee-mq-650-par-meter","title":"Apogee MQ-650 PAR Meter + Wand","description":"\u003cp\u003eThe upgrade to the MQ-500, - this MQ650 reads a wider spectrum of 400 - 750nm\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eComes as standard with the extension wand \u003c\/span\u003eto attach the sensor, and also an option of a protective case (with foam lining).\u003c\/p\u003e\n\u003cp\u003eThe MQ-650 quantum meter is designed for underwater PAR measurements and already applies the sensor's immersion effect correction factor to the meter readings through firmware. The meter provides excellent measurements under all light sources, including LEDs. The meter consists of a waterproof quantum sensor attached via waterproof cable to a handheld meter. The waterproof sensor incorporates a blue-enhanced silicon photodiode and custom optical filters with a rugged, anodized aluminum body with acrylic diffuser. The underwater quantum sensor is typically used in saltwater aquariums where corals are grown.\u003cstrong\u003e Note: The handheld meter is not waterproof, only the sensor. The cable and the A320 telescopic lance are waterproof (this lance is different to that included with other models) \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.apogeeinstruments.com\/content\/MQ-510-spec-sheet.pdf\"\u003eSpecification Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.apogeeinstruments.com\/content\/MQ-650-manual.pdf\"\u003eMQ-650 Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"APOGEE","offers":[{"title":"Without Protective Case","offer_id":43615180914903,"sku":"7570","price":805.0,"currency_code":"GBP","in_stock":false},{"title":"With Protective Case + £35","offer_id":43615180947671,"sku":"7571","price":845.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0561\/9092\/7032\/products\/meters-sensors-apogee-mq-650-par-meter-38742020260055.jpg?v=1679580040"}],"url":"https:\/\/www.thehydrobros.com\/collections\/par-meters-grow-light-meters.oembed","provider":"The Hydro Bros","version":"1.0","type":"link"}