SQ-640 Quantum Light Pollution Sensor

$415.00

The SQ-640 Quantum Light Pollution sensor is a self-powered sensor. 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 Quantum Light Pollution 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 Quantum Light Pollution 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-640 sensors in indoor grow environments utilizing LED lights.

The analog version of this sensor (SQ-640) 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 connecting at the cable junction with our microCache Bluetooth Micro Logger.

 

FOR MORE PRODUCT INFORMATION, CHECK OUT THESE LINKS

 

MORE INFORMATION ON APOGEE QUANTUM LIGHT POLLUTION SENSORS >> click here

 

How is the SQ-640 different from previous Apogee quantum sensors?

The SQ-640 is an extended range photon flux density (PFD) sensor with a spectral range of 340 to 1040 nm ± 5 nm, which can be seen in the graph below. 
SQ-620 Spectral Response
Where is the SQ-640 used?

Many plants are affected by interruptions in dark periods even by extremely dim light. Apogee’s new Quantum Light Pollution Sensor is designed to detect photons from 340-1040 nm that are below the sensitivity level of a typical quantum sensor. Detecting stray photons that disrupt the night, even those from IR security camera lights, is critical in preventing negative effects in plants such as hermaphrodism and stunted growth.
Full Description
Where to Buy

The SQ-640 Quantum Light Pollution sensor is a self-powered sensor. 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 Quantum Light Pollution 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 Quantum Light Pollution 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-640 sensors in indoor grow environments utilizing LED lights.

The analog version of this sensor (SQ-640) 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 connecting at the cable junction with our microCache Bluetooth Micro Logger.

 

FOR MORE PRODUCT INFORMATION, CHECK OUT THESE LINKS

 

MORE INFORMATION ON APOGEE QUANTUM LIGHT POLLUTION SENSORS >> click here

 

How is the SQ-640 different from previous Apogee quantum sensors?

The SQ-640 is an extended range photon flux density (PFD) sensor with a spectral range of 340 to 1040 nm ± 5 nm, which can be seen in the graph below. 
SQ-620 Spectral Response
Where is the SQ-640 used?

Many plants are affected by interruptions in dark periods even by extremely dim light. Apogee’s new Quantum Light Pollution Sensor is designed to detect photons from 340-1040 nm that are below the sensitivity level of a typical quantum sensor. Detecting stray photons that disrupt the night, even those from IR security camera lights, is critical in preventing negative effects in plants such as hermaphrodism and stunted growth.
Current Stock:
Power Supply Self-powered Sensitivity 1 mV per µmol m-2 s-1 Calibration Factor 1 µmol m-2 s-1 per mV Calibration Uncertainty ± 5 % Measurement Range 0 to 200 µmol m-2 s-1 Measurement Repeatability Less than 0.5 % Calibrated Output Range 0 to 200 mV Long-term Drift (Non-stability) 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 nm ± 5 nm (wavelengths where response is greater than 50 %) Directional (Cosine) Response ± 2 % at 45° zenith angle, ± 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 51 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