Introduction to Sensor
The SE-421-SS Photometric Sensor is a rugged digital lux sensor designed to measure light levels from 0 to 150,000 lux using the SDI-12 communication protocol. Its fully submersible aluminum housing and IP68 marine-grade connector provide reliable performance in demanding environments. It is suitable for offices, sports arenas, hospitals, museums, and other lighting applications.
Specifications
Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Requirement | 5.5 to 24 V DC |
| Current Draw | 1.4 mA (quiescent); 1.8 mA (active) |
| Calibration Uncertainty | ±5% |
| Measurement Range | 0 to 150,000 lux |
| Measurement Repeatability | Less than 0.5% |
| Long-Term Drift (Non-Stability) | Less than 2% per year |
| Non-Linearity | Less than 1% |
| Response Time | Less than 0.6 s |
| Field of View | 180° |
| Spectral Range | CIE 1931 luminous efficiency function |
| Directional (Cosine) Response | ±2% at 45°; ±5% at 75° |
| Temperature Response | Less than 0.1% per °C |
| Operating Environment | −40 to 70 °C; 0 to 100% relative humidity |
| Dimensions | 30.5 mm diameter × 37 mm height |
| Mass | 140 g (with 5 m cable) |
| Cable | 5 m shielded, twisted-pair wire; TPR jacket; pigtail lead wires; stainless-steel (316) M8 connector |
| Warranty | 4 years against defects in materials and workmanship |
| Manufactured | Assembled in the USA |
Features
Applications