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SU-221 SDI-12 UV-A Sensor

Updated:2025-03-13

Brand: APOGEE
Model: SU-221
Description: The SU-221-SS is a digital UV-A sensor with SDI-12 communication protocol and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers.
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Product Details

SU-221 SDI-12 UV-A Sensor Introduction：

SU-200 Specification Sheet

The SU-221 is a digital UV-A sensor with SDI-12 communication protocol and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The sensor offers a low-cost option for detecting UV radiation from 300 to 400 nm and is calibrated in energy flux units of Watts per square meter. Typical applications include monitoring the filtering ability and stability of various materials, measuring UV-A radiation in outdoor environments and laboratory use, and monitoring UV radiation in horticultural operations environments. Sensor includes IP68 marine-grade stainless-steel cable connector to simplify sensor removal and replacement for maintenance and recalibration.

SU-221 SDI-12 UV-A Sensor Drawing：

SU-221 SDI-12 UV-A Sensor Specifications:

Power Supply	5.5 to 24 V DC
Current Draw	1.4 mA (quiescent), 1.8 mA (active)
Calibration Factor	Custom for each sensor and stored in firmware
Calibration Uncertainty	± 5 %
Measurement Range	0 to 100 W mˉ2
Measurement Repeatability	Less than 0.5 %
Long-term Drift	Less than 2 % per year
Non-linearity	Less than 1 %
Response Time	Less than 0.6 s
Field of View	180?
Spectral Range	305 to 390 nm (wavelengths where response is greater than 10 % of maximum)
Directional (Cosine) Response	± 2 % at 45?; ± 5 % at 75? zenith angle
Temperature Response	Less than 0.1 % per C
Operating Environment	-30 to 85 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
Manufactured	Made in the USA