SQ-640-SS Quantum Light Pollution Sensor :
The SQ-640 Quantum Light Pollution Sensor is a self-powered sensor. The sensor features a rugged, aluminium housing that is fully submersible and built to withstand harsh conditions, as well as high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. 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.
Sensors that measure PPFD are often called quantum sensors due to the quantized nature of radiation. A quantum refers to the minimum quantity of radiation, one photon, involved in physical interactions (e.g., absorption by photosynthetic pigments). In other words, one photon is a single quantum of radiation. Sensors that function like traditional quantum sensors but measure a wider range of wavelengths can be thought of as an ‘extended range’ quantum sensor
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 utilising 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 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 micro Cache.
|✅ 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
✅ Measuring extremely dim light that may cause interruptions in plant dark periods
|✅ Accurate, Stable Measurements
✅ High-Quality Cable
✅ Calibration Traceability