SQ-110-SS Apogee Quantum self-supplied Sensor (Calibrated for Sun light measurements)

e 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-110) 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.

- Power Supply: Self-powered
- Sensitivity: 0.2 mV per µmol mˉ² sˉ¹
- Calibration Factor: 5 µmol mˉ² sˉ¹ per mV (reciprocal of sensitivity)
- Calibration Uncertainty: ± 5%
- Calibrated Output Range: 0 to 800 mV
- Measurement Repeatability: Less than 0.5%
- Non-stability (Long-term Drift): Less than 2% per year
- Non-linearity: Less than 1% (up to 4000 µmol mˉ² sˉ¹)
- Response Time: Less than 1 ms
- Field of View: 180˚
- Spectral Range: 410 nm to 655 nm (wavelengths where response is greater than 50% of maximum)
- Spectral Selectivity: Less than 10% from 469 to 655 nm
- Directional (Cosine) Response: ± 5% at 75˚ zenith angle
- Temperature Response: 0.06 ± 0.06% per C
- Operating Environment: -40 to 70 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