Model GDS-MV

Gas Density Switch

Selected documents
Sales contact

WIKA Instruments Namibia (Pty.) Ltd.

+26 4 61238811
+26 4 61233403


  • Gas density monitoring of closed SF6 tanks
  • For medium voltage switchgear
  • For the use in ring main units

Special Features

  • Density switch with reference chamber and gas compensation. Without influence of altitude and atmospheric pressure change; no recalibration necessary


Working ranges
Permissible filling pressure (tank pressure) at +20 °C: 5 bar abs.

Permissible temperature ranges
Ambient: -20 … +60 °C (gas phase)
Storage: -40 … +80 °C

Alarm contacts / Contact rating
1 or 2 micro switches to make or break, switching points according to customer’s requirement and secured
Contact rating: 5 A / 250 V AC, 50 Hz

Switching distance
Between 2 contacts:  ≥ 50 mbar
Switching hysteresis: typically 50 mbar

Switching accuracy of reference contact
at 20° C:              ≤ ±40 mbar
at -20 … +60 °C: ≤ ±60 mbar

High-voltage test
2 kV, 50 Hz, 1s (wiring versus case)

Electrical connection
Standard: open-ended cable, length 0.3 m

Process connection
Stainless steel, bottom, G 1/4 B (male), 14 mm flats

Pressure element
Capsule spring, stainless steel, welded
Gas tight:      leakage rate ≤ 1 · 10-8 mbar · l / s
Test method: spectrometry of helium mass

Gas Density Switch
  • Gas Density Switch
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