working principle:
The sensor adopts the imported SHT11 chip and the imported sensor module ms5540c. The module includes a temperature sensing element, a humidity sensing element, a piezoelectric resistance pressure sensing element and an ADC interface IC. It has a wide range and strong anti-static ability. They are converted into digital Modbus protocol output through the change of environment parameters (see Appendix 1).
TECHNICAL SPECIFICATION
●Measuring range：-40-60℃,0-100%RH,100-1100hPa
●Temperature Resolution：0.01℃
●Accuracy：≦±0.3℃(@25℃,typical)
≦±3%RH(@25℃,20%-80%RH,typical)
●Accuracy of air pressure measurement：Digital output 16 bits;
●Humidity measurement resolution：0.05%RH
●Air pressure measurement resolution ：0.1 hPa
●Working Voltage： 9V～24V(12V)
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