SQ-100X-SS: Original Quantum Sensor

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.

Specifications

Power Supply: Self-powered

Sensitivity: 0.1 mV per µmol mˉ² sˉ¹

Calibration Factor: 10 µmol mˉ² sˉ¹ per mV (reciprocal of sensitivity)

Calibration Uncertainty: ± 5 %

Calibrated Output Range: 0 to 250 mV

Measurement Repeatability: Less than 0.5 %

Non-stability (Long-term Drift): Less than 2 % per year

Non-linearity: Less than 1 % (up to 2500 µmol mˉ² sˉ¹ )

Response Time: Less than 1 ms

Field of View: 180˚

Spectral Range: 370 to 650 nm (wavelengths where response is greater than 50 % of maximum)

Directional (Cosine) Response: ± 5 % at 75˚ zenith angle

Temperature Response: -0.04 % per C

Operating Environment: -10 to 60 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m

Dimensions: 24 mm diameter, 33 mm height

Mass: 90 g (with 5 m of lead wire)

Cable: 5 m of shielded, twisted-pair wire with TPR jacket (high water resistance, high UV stability, flexibility in cold conditions)

Warranty: 4 years against defects in materials and workmanship

Manufactured: Assembled in the USA