Model GD10-FT

Gas density transmitter

With 4 ... 20 mA density and Pt100 temperature signal

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Applications

  • Gas density monitoring of closed SF6 tanks
  • For indoor and outdoor installation in SF6 gas-insulated switchgear
  • Easily integrate able into a gas management system

Special Features

  • 4 ... 20 mA density and Pt100 temperature readout
  • Includes additional temperature sensor
  • Output: 1 x 4 ... 20 mA, 1 x Pt100
  • Wetted parts made of stainless steel, fully welded
  • High EMI performance, excellent long-term stability

Description

Model GD10-FT features a gas density transmitter with additional Pt100 temperature sensor integrated into a special connection head. It functions fully as a standard GD10 gas density transmitter, however, the dual output allows to compensate individual tank temperature disbalance effects.

The gas density transmitter itself is electrically compensated following the non-linear behavior of SF6 gas according to the virial equation. The gas density transmitter picks up the pressure and temperature of the SF6 gas contained in the 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 (measuring ranges from 0 ... 10 g/liter to 0 ... 80 g/liter).

A recalibration of the zero signal as well as maintenance service are not necessary due to the high long-term stability of the gas density transmitter. As a standard, wetted parts are made of stainless steel.

The hermetically welded measuring cell guarantees high long-term leak tightness. The specific structure of the measuring cell requires absolutely no internal sealing elements so that no leakage occurs through the instrument.

Due to these features the gas density transmitter is also independent of atmospheric pressure fluctuations and variations of the mounting height. The case is rated IP 65.

The EMI properties of the transmitter are tested according accroding to industrial standards (see page 3) and guaranteea safe pick-up of the signal which is especially suited to conditions prevailing in high-voltage switching units..

Gas density transmitter
  • Gas density transmitter
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