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Water Gas Pressure Gauge Sensor Digital with 4-20mA RS485 Modbus Output and Switches Position Pressure Transmitter HVAC 3051, Find Details and Price about Pressure Gauge Digital with 4-20mA and Switches Water Pressure Sensor with RS485 Modbus Output from Water Gas Pressure Gauge Sensor Digital with 4-20mA RS485 Modbus Output and Switches Position Pressure Transmitter HVAC 3051 - Shanghai Ziasiot Technology Co., Ltd