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SQ-100X-SS Original Quantum Sensor

Make:  Apogee                                            Model:  SQ-100X
✅ It is cost-effective.
✅ An 0riginal quantum sensors work well for broadband radiation sources.
✅ A full-spectrum sensors are good for all light sources, including LEDs.
✅ A self-cleaning.
✅ A cosine-corrected head that is fully-potted for a waterproof design.

The SQ-100X-SS is a self-powered, analog original quantum sensor with a 0 to 250 mV output. The sensor features a rugged, self-cleaning sensor housing design, and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. Typical applications include PPFD (Photosynthetic Photon Flux Density) measurement over plant canopies in outdoor environments, greenhouses, and growth chambers, and reflected or under-canopy (transmitted) PPFD measurements in the same environments. Quantum sensors are also used to measure PAR (Photosynthetically Active Radiation)/PPFD in aquatic environments, including salt water aquariums where corals are grown. Sensor includes IP68 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.

The analog version of this sensor (SQ-100X-SS) comes with the inline cable connector placed 30 cm from the sensor head for either standard use as a long-cable pigtail sensor, or for use with our microCache Bluetooth Micro Logger by unscrewing the connector, discarding the long section of cable and then screwing the sensor to the mating connector on the microCache.





General Specification



90 g


24 mmdiameter, 33 mm height


0.1 mV per μmol m⁻² s⁻¹ , 0 to 250 mV

Operating Temperature

-10 to 60 C; 0 to 100 % relative humidity; can be submerged in water up to 30 m

Temperature Response

-0.04 % per C

Cable Length

5 m of two conductor, shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability, flexibility in cold conditions); pigtail lead wires; stainless steel (316), M8 connector located 25 cm from sensor head.

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