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Integrated multi-parameter environmental monitoring sensor measuring CO₂, temperature, humidity, pressure, noise, and light with RS485 ModBus-RTU interface for outdoor and indoor applications.
High-precision photoelectric illuminance transmitter with dual measurement ranges (0 ~ 65535Lux or 0 ~ 200000Lux), RS485 ModBus-RTU interface, aluminum alloy IP65 enclosure for outdoor and industrial applications.
The OHTS1121 is a qualitative rain/snow detection sensor using AC impedance measurement with RS485 ModBus-RTU and relay outputs, featuring IP68 protection and optional heating for harsh outdoor environments.
Technical deep dive into photodiode operation principles, spectral sensitivity, and conversion algorithms used in professional LUX meters like the OHTS1091 for industrial IoT applications.