SenTec

SEM220B LCD temperature and humidity transmitter

SEM220B LCD temperature and humidity transmitter with liquid crystal display, real-time display temperature and humidity, RS485 signal output, communication distance up to 2000 meters (measured), probe inside and outside optional.

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

Items

Parameter

DC power supply (default)10~30V DC
Maximum power consumptionRS485:0.4W, Analog: 1.2W
Precision Ahumidity±2% RH (5% RH~95% RH, 25°C)
temperature±0.4°C (25°C)
Precision B (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≤4s (1m/s wind speed)
temperature≤15s (1m/s wind speed)
Probe operating temperature-40~+80°C (Built-in probe, External hardcover probe)
Probe operating humidity0%RH-100%RH
Signal outputRS485 output,4mA~20mA,0~5V/0~10V
Communication protocolModbus-RTU communication protocol
Temperature display resolution0.1 ° C
Humidity display resolution0.1% RH
Temperature and humidity refresh time1S
Transmitter circuit operating temperature and humidity-40°C~+60°C, 0%RH~80%RH
Parameter settingsModify directly via software settings or buttons

Documents

Take the next step

Get a Quote

Request a quote from us based on your specific requirements

To be a Distributor

If you want to distribute sentec brand in your local area, you can contact us for more.

Installation & Maintain

A group of  professional engineer is here to help your sensor installation & maintenance.