SenTec

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SEM220A Wall-mounted LED display temperature and humidity transmitter

A temperature and humidity sensor is a sensor device equipped with humidity sensitive and thermal elements that can be used to measure temperature and humidity, some with on-site display, and some without on-site display. Temperature and humidity sensors are widely used in various fields of production and life due to their small size and stable performance.

A temperature and humidity sensor is a sensor device equipped with humidity sensitive and thermal elements that can be used to measure temperature and humidity, some with on-site display, and some without on-site display. Temperature and humidity sensors are widely used in various fields of production and life due to their small size and stable performance.

The temperature and humidity sensor mostly uses the temperature and humidity integrated probe as the temperature measuring element, collects the temperature and humidity signals, and processes them through the circuits such as voltage stabilization filtering, operational amplification, nonlinear correction, V/I conversion, constant current and reverse protection. After that, it is converted into a current signal or a voltage signal output that has a linear relationship with temperature and humidity, and can also be output directly through the main control chip such as 485 or 232 interface.

Parameters

RS485 Type

DC power supply (default)10~30V DC
Power consumptionRS485 output0.4W
A precisionhumidity±2% RH (5% RH~95% RH, 25°C)
temperature±0.4°C (25°C)
B precision (default)humidity±3% RH (5% RH~95% RH, 25°C)
temperature±0.5°C (25°C)
Long-term stabilityhumidity≤1%RH/y
temperature≤0.1°C/y
Response timehumidity≤8s (1m/s wind speed)
temperature≤25s (1m/s wind speed)
Signal outputRS485 output (standard Modbus-RTU protocol)
Communication parametersDefault address code is 1, the default baud rate is 4800 (modified by the configuration software)
Protocol frame formatNo parity, 8 data bits, 1 stop bit (N, 8, 1)
Temperature range-40°C~+120°C, default -40°C~+80°C
Humidity range0%RH-100%RH
Transmitter circuit operating temperature and humidity-40°C~+60°C, 0%RH~80%RH

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