Thermal pressure transmitter GDT-20

membraneRS-485Modbus

Permanent monitoring of the relevant gas condition parameters in closed tanks For internal and external SF6-insulated equipment Special Features High-accuracy sensor technology Modbus® output protocol via RS-485 interface Ingress protection IP65 Very good long-term stability and EMC characteristics Compact dimensions Description The model GDT-20 transmitter is a multi-sensor system with digital output for the measurement parameters of pressure and temperature. Based on these measured values, the condition-related data can be determined. Permanent monitoring In order to prevent system failures in switchgear and network outages, the permanent monitoring of the gas density is essential. The GDT-20 transmitter calculates the current gas density from the pressure and temperature using a complex virial equation in the transmitter's powerful microprocessor. Pressure changes resulting from thermal effects will be compensated by this and will not affect the output value. Modbus® field bus The RS-485 interface communicates using the Modbus® RTU protocol. The instrument's output parameters and their units can be configured and read according to requirements. The GDT-20 can be configured later by the customer for each defined SF6 gas mixture with N2 or CF4. Signal stability Due to its high long-term stability, the transmitter is maintenance-free and requires no recalibration. Due to the hermetically sealed weld seam and a measuring cell design without sealing elements, the permanent sealing of the measuring cell is ensured.