The gas density transmitter is electronically compensated. The compensation follows the nonlinear behavior of SF6 gas. The basic principle is the calculation following virial equation. The gas density transmitter picks up the physical variables pressure and temperature of the SF6 gas contained in the device (tank). The current gas density is ascertained from both variables by means of an electronic evaluation system. Thermal induced pressure changes are dynamically compensated and do not affect the output signal.
The gas density transmitter generates a density proportional, standardized signal of 4 ... 20 mA.
Applications
Gas density monitoring of closed SF6 tanks
For outdoor installation in SF6 gas-insulated switchgear
Special Features
Measuring ranges from 0 ... 10 to 0 ... 80 g/litre
Output signal 4 ... 20 mA, 2-wire
Temperature compensated and hermetically sealed, therefore no influence temperature, by atmospheric pressure fluctuation or differences in altitude
Wetted parts and case made of stainless steel, fully welded
Ingress protection IP 67, field case, excellent long-term stability, high EMI performance