Temperature Alarm 12VDC GSM 3G 4G RTU Metal for Solar Power Station Meteorological Observatory Library 4GL-V US Plug Item Type: Temperature Alarm Material: Metal Power Consumption: Standby: 20mA at 12V; Maximum power consumption: 150mA at 12V GSM/3G/4G: GSM Frequency: 850/900/1800/1900MHz (default) SIM Interface Supports 3V SIM cards External Antenna: SMA antenna interface, 50 ohms Support Protocol: for Modbus RTU Over TCP protocol, for Modbus TCP protocol Built in Battery: 3.7V/900mAh lithium batteryx1 (built in), can work for 8 hours Operating Temperature Range: -10°C~60°C Operating Humidity Range: Relative humidity 95% (non-condensing) Device Size: Approx. 70 x 88 x 30cm / 27.6 x 34.6 x 11.8in(LxWxH) Typical Application Sites: Base station transceiving, for ATM monitoring, power station monitoring, pump station monitoring and other remote data acquisition and monitoring fields; Unattended computer room monitoring, power room monitoring, machine room dynamic environment monitoring; Remote data collection and monitoring of solar power stations and intelligent charging piles; Water level, water pressure, flow, flow rate and other parameters collection; Wind speed, wind power, rainfall, temperature and other parameters of the meteorological observatory collection; Data collection of oil level, oil temperature, oil pressure, etc.; Intelligent agricultural temperature and humidity data collection and monitoring; Intelligent breeding temperature and humidity data collection and monitoring; Data collection and monitoring of temperature and humidity in warehousing and libraries; Data collection and monitoring of meteorological station information; Temperature monitoring of cold storage, fruit and vegetable storage room, industrial computer room, substation cabinet, etc.; Other occasions where temperature and humidity, PM2.5 value, and carbon dioxide distribution need to be monitored;