Introduction to Sensor
The SU-221-SS Digital UV-A Sensor delivers accurate UV-A radiation measurements (300–400 nm) with SDI-12 digital communication for seamless integration with data loggers and controllers. Its rugged design, marine-grade IP68 stainless steel connector, and high-quality cable ensure reliable long-term performance in outdoor, laboratory, and horticultural applications while allowing easy maintenance and recalibration.
Specifications
Specifications
| Parameter | Specification |
|---|---|
| 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 m⁻² |
| 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 Cable) | 140 g |
| Cable | 5 m shielded, twisted-pair wire with TPR jacket (high water resistance, high UV stability, flexibility in cold conditions), pre-tinned pigtail lead wires, and stainless steel (316) M8 connector |
| Warranty | 4 years against defects in materials and workmanship |
| Manufacturing | Assembled in the USA |
Features
Applications
Environmental Studies
Agricultural Research
Laboratory Research
Solar UV Monitoring
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