Apps
Permanently monitor gas status parameters in sealed cans
SF6 gas insulated equipment for indoor and outdoor use

Features
Using high accuracy sensor technology
With RS-485 interface, support MODBUS® output protocol
IP 65 protection level
Long-term stability and EMC characteristics
Compact structure

Description
GDHT-20 transmitter with multi-sensor system with digital output for measuring pressure, temperature and humidity.
Permanent monitoring
In order to avoid system failures and network outages in the switchgear, continuous monitoring of gas density is critical.
The GDHT-20 is equipped with a powerful microprocessor that calculates the current gas density from the measured pressure and temperature values ​​using complex Wiley equations. In addition, this type of transmitter compensates for pressure changes caused by thermal effects so that it does not affect the output value.
In addition, the GDHT-20 transmitter can transmit humidity and dew point information online, enabling monitoring to meet Cigré guidelines and IEC standards.
MODBUS®Fieldbus
This model transmitter has RS-485 interface, support MODBUS® RTU communication protocol. Users can configure and read the output parameters of the meter and its units as needed. In addition, the user can configure the transmitter based on the gas composition being monitored, such as a gas mixture of SF6 and N2 or CF4.
Signal stability
This product has high long-term stability and requires no maintenance and recalibration. In addition, this type of transmitter uses a hermetically sealed weld and a non-sealed measuring unit design to ensure permanent sealing of the measuring unit.
The EMC characteristics of the transmitter fully comply with the requirements of IEC 61000-4 to IEC 61000-4-6, to ensure that the data output is not disturbed.