位数的温度&湿度传感器

Introduction CHD 301C1 is temperature & humidit sensor with high reliability and superior stability. With big LED display, people can examine local temperature and humidity Via RS485 / 422 network communication, one PC can load 254 sensors to compose a surveillance system, at most 254×16=4046 pieces sensors can be managed Main features are as follows * RS485 or RS422 Double Bus guarantee the safety of device communication * Big LED display,real time show local temperature and humidity * With button to control backlight, which can automatically turn off after 10 sec delay time * Large temperature range, sensor can be separated with control part * Measurement range can be set. It can set congealing dew resistance function and real time alarm when exceeding. * Strong anti-interference, low power consumption and 3 grade thunderproof protection * Featured with exacurate and stable measuring, high precision and good value for money, etc. Technical Parameters > Dimension: L90 ×W85×H19 mm > Weight: 100g > Color: light blue, milk white, sub-black, etc. > Display: LCD liquid display > Power supply: DC12 24V; backlight current ≤ 20mA, with current limit, thunderproof and reverse polarity protection, conform with anti-explosion requirements; > Communication interface: standard RS485 double bus or RS422 interface > Transmission distance: max. 1200 m > Node capacity: max.30; if there are many devices, use CHD485HUB/ CHD422 HUB to extend > Humidity Pricision: ± 3.0‰ RH > Temperature Pricision: ± 0.4°c > Humidity Range: 5%-95%; > Temperature range: -30°c 70°c