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  1. The MultispeQ Beta PAR Sensor is calibrated to 1% accuracy with a LI-COR LI-190R Quantum Sensor. MultispeQ Beta's TCS34715 "PAR" sensor (w/ Hot Mirror)... https://www.scirp.org/journal/paperinformation.aspx?paperid=88576 MultispeQ Beta, PhotosynQ... https://royalsocietypublishing.org/doi/10.1098/rsos.160592 AMS Document... https://ams.com/documents/20143/36005/ColorSensors_AN000166_1-00.pdf/d1290c78-4ef1-5b88-bff0-8e80c2f92b6b This is a Simple I2C PAR Sensor (ubiquitous TCS34725 Color Sensor) for Arduino or RPi that requires; 1. White Acrylic Diffuser Lens(es) with at most 15% Transparency for 0 - 2225 umol/m2/s (PPFD) range. 2. Remote sensor housing is a 3/4" PVC slip coupling (Electrical) with a hole sized for the cable diameter (repurpose Keyboard cables?) 3. Wiring (4 - Conductor) per standard TCS34725 wiring to Arduinos, using 5V /Vin (for the remote cable sensors). 3. Require Lens, Lux and PPFD (PAR) coefficient factors and Bench "Calibration" with Lux meter or PAR meter, if available. 4. Set up using "Fixed" (same) Parameters... 1x - Gain, 700 ms - ATime, 2.4 ms WTIME for all sensors, no exception. These sensor still require calibration with an actual Calibrated PAR Meter for confirmation, appears to be relatively accurate, but are still a "Work in Progress". The sensors can be connected to any Arduino platform that supports the I2C bus and TCS34725 Color Sensor and works with standard Arduino displays. Design and Build are... https://ledgardener.com/forum/viewtopic.php?p=24962#p24962
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