SM2181B sensor is RS485 bus type atmospheric pressure and temperature and humidity integrated sensor. It adopts RS485 interface and standard MODBUS-RTU protocol. It can realize multi-point simultaneous monitoring, networking and remote transmission. The utility model is suitable for various places, and is especially suitable for places such as agricultural sheds and urban lighting.
Built in atmospheric pressure sensor is a high-precision, ultra-low pressure sensor. It offers an absolute accuracy of 3 Pa, down from 300 to 110 thousand watts in the measuring range. Atmospheric pressure sensor is a piezoresistive sensor based on EMC robustness, high accuracy, linearity and long-term stability. Can be applied to leisure, sports, weather, medical, health or environmental monitoring.
In order to facilitate engineering networking and industrial applications, this module uses the widely used MODBUS-RTU communication protocol, and supports the two development. The user only needs to use any serial communication software according to our communication protocol to realize the inquiry and establishment of the module data.
Parameter technical index
Pressure range 300... 1100hPa (9000 meters above sea level... -500 meters)
Pressure accuracy 0.06hPa (0.5 meters)
The temperature range is -40 DEG C, ~+123.8 DEG C
The nominal temperature measuring accuracy of the sensor is + 0.5 centigrade
Range of moisture measurement 0~100RH
Humidity measurement accuracy + 4.5%RH @25 DEG C
Maximum allowable error = 7%;
Repeat test + 5%;
The temperature characteristic is + 0.5%/ centigrade
Baud rate 9600
Communication port RS485, device address can be set
The power supply bus is powered by DC6V-24V 1A
Power consumption 2W
Storage temperature -40 - 85
Operating environment: -40 - 85, -40 - +85
Outline size 115 * 96 * 30mm3