S2-421-SS SDI-12 PRI Sensor

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The S2-421-SS PRI upward-looking sensor is a unique two-channel digital sensor for measuring 532 nm (Green) and 570 nm (Yellow) with SDI-12 communication protocol. The sensor features a rugged, aluminum housing that is fully-submersible and built to withstand harsh conditions, and 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. Typical applications of PRI sensors include monitoring plant canopies. PRI is often used in studies of canopy photosynthesis and response to stress. 

The analog version of this sensor (S2-121) 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.

 

FOR MORE PRODUCT INFORMATION, CHECK OUT THESE LINKS

 

MORE INFORMATION ON APOGEE PRI SENSORS >> click here

Full Description
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The S2-421-SS PRI upward-looking sensor is a unique two-channel digital sensor for measuring 532 nm (Green) and 570 nm (Yellow) with SDI-12 communication protocol. The sensor features a rugged, aluminum housing that is fully-submersible and built to withstand harsh conditions, and 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. Typical applications of PRI sensors include monitoring plant canopies. PRI is often used in studies of canopy photosynthesis and response to stress. 

The analog version of this sensor (S2-121) 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.

 

FOR MORE PRODUCT INFORMATION, CHECK OUT THESE LINKS

 

MORE INFORMATION ON APOGEE PRI SENSORS >> click here

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Calibration Factor (recipricol of sensitivity) Custom for each sensor and stored in firmware Calibration Uncertainty ± 5 % Output Range SDI-12 Power Supply 5.5 to 24 V DC Wavelength Ranges Green detector = 532 nm with 10 nm full-width half-maximum; Yellow detector = 570 nm with 10 nm full-width half-maximum Measurement Range 2x full sunlight Measurement Repeatability Less than 1 % Long-term Drift Less than 2 % per year Response Time Less than 0.6 s Field of View 180˚ Directional (Cosine) Response ± 2 % at 45˚; ± 5 % at 75˚ zenith angle Temperature Response Less than 0.1 % per C Housing Anodized aluminum body with acrylic diffuser IP Rating IP68 Operating Environment -40 to 70 C; 0 to 100 % relative humidity Dimensions 30.5 mm diameter, 37 mm height Mass (with 5 m of cable) 140 g Cable 5 m of shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability, flexibility in cold conditions); pigtail lead wires; stainless steel (316), M8 connector Warranty 4 years against defects in materials and workmanship