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Original factory packaging
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Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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Specification Sheet
The SE-421 Photometric sensor is a digital lux sensor with a range of 0-150000 lux and SDI-12 communication protocol. The sensor features a rugged, aluminum housing that is fully-submersible and is 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 photometric sensors include measuring light levels for human vision in offices, sports arenas, hospitals, museums and more.
| 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 150000 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 (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 |
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