SQ-627 340-1040 nm SDI-12 Extended Range PFD Sensor

The SQ-627 Extended Range PFD is a digital sensor with SDI-12 communication protocol. The sensor features a rugged, aluminum housing that is fully-submersible and built to withstand harsh conditions.

  • Product Name:SQ-627 340-1040 nm SDI-12 Extended Range PFD Sensor
  • Item No.:SQ-627
  • Manufacturers:Apogee
  • Country of Origin:USA

The SQ-627 Extended Range PFD is a digital sensor with SDI-12 communication protocol. The sensor features a rugged, aluminum housing that is fully-submersible and built to withstand harsh conditions. The sensor cable includes an IP68 marine-grade stainless-steel cable connector to simplify sensor removal and replacement from permanent installations for maintenance and calibration. Typical applications of Extended Range PFD sensors include incoming PFD measurements over plant canopies in indoor greenhouses or in growth chambers, and reflected or under-canopy (transmitted) PFD measurements in the same environments. Since the detector on this particular Extended Range sensor is sensitive to radiation with wavelengths up to 1100 nm, beyond the range of wavelengths that influence plants, we recommend only using the SQ-627 sensors in indoor grow environments utilizing LED lights.

 

The analog version of this sensor (SQ-620) 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.


Input Voltage:     5.5 to 24 V DC

Current Draw:     1.4 mA (quiescent), 1.8 mA (active)

Calibration Uncertainty:     ± 5 %

Measurement Range:     0 to 4000 µmol mˉ² sˉ¹

Measurement Repeatability:     Less than 0.5 %

Calibrated Output Range:     0 to 200 mV

Long-term Drift:     Less than 2 % per year

Non-linearity:     Less than 1 % (up to 4000 µmol m⁻² s⁻¹)

Response Time:     Less than 1 ms

Field of View:     180˚

Spectral Range:     340 to 1040 ± 5 nm (wavelengths where response is greater than 50 %)

Directional (Cosine) Response:     ± 2 % at 45˚; ± 5 % at 75˚ zenith angle

Azimuth Error:     Less than 0.5 %

Tilt Error:     Less than 0.5 %

Temperature Response:     -0.11 ± 0.04 % per C

Uncertainty in Daily Total:     Less than 5 %

Housing:     Anodized aluminum body with acrylic diffuser

IP Rating:     IP68

Operating Environment:     -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m

Dimensions:     30.5 mm diameter, 37 mm height

Mass (with 5 m of cable):     140 g

Cable:     5 m of two conductor, shielded, twisted-pair wire; TPR jacket; pigtail lead wires; stainless steel (316), M8 connector located 25 cm from sensor head

Warranty:     4 years against defects in materials and workmanship