Campbell Scientific recently replaced the LI190SB Quantum Sensor with the LI190R. Quantum sensors measure photosynthetic photon flux density (PPFD) in both natural and artificial light, and are ideal for growth chambers and greenhouses. Design features of the new sensor include wider drainage slots and deeper channels that prevent water from collecting around the diffusing lens, and a potted cable entry that keeps moisture out of the sensor base. A detachable sensor head allows for replacement and factory recalibration while the wiring remains intact. The LI190R attaches to a tripod or tower using the same leveling fixture and sensor mounts as its predecessor.

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