The Trafag density sensor type 8775 has been specially constructed for the surveillance of insulation gas.
The constant resonance frequency of a vacuum crystal oscillator is compared to the resonance frequency of an identical quartz located in the measurement gas. The difference is proportional to the density of the measuring gas.
In addition, the gas density sensor includes a temperature sensor. The current pressure and the pressure at 20 ° C is calculated from the values measured density and temperature.
All four parameters can be read via the RS485 / Modbus interface.
The Trafag gas density sensor 8775 was specifically designed for monitoring insulation gases.
The constant resonant frequency of a quartz oscillator under vacuum is compared with the resonant frequency of an identical quartz sample gas. The difference is proportional to the density of the sample gas.
In addition to the gas density sensor temperature sensor. The non compensated pressure and the pressure at 20 ° C are calculated from the measured values of the density and the temperature.