integral sensor

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Quantum Meters: Apogee Instruments Inc.
... ELEC Our basic meter with integral sensor that measures instantaneous Photosynthetic Photon Flux (PPF). Specify calibration for sunlight or electric light. $199 domestic $218 international SENSOR RESPONSE USE UNDER DIFFERENT LIGHT ... and dust, which block light and result in low readings. The Apogee meter with integral sensor uses a domed top to repel water and dust. Accurate cosine response is ...
www.apogee-inst.com