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Wika Gas density monitor, Model GDM-100-TI-D

Gas Density Monitor - GDM-100-TI-D

Brand: WIKA Alexander Wiegand SE & Co. KG
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Gas density is a crucial operating parameter for high-voltage switchgear. If the required gas density is not present, safe operation of the plant cannot be guaranteed.

The gas density measuring instruments from WIKA warn reliably against dangerously low gas quantities, even under extreme environmental conditions. If the gas density drops as a result of a leakage, the switch contacts will switch.

In addition to the traditional gas density monitor, with the model GDM-100-TI-D with Modbus® output, high-precision sensors and evaluation electronics are incorporated.
Features
  • Ideally suited for Smart Grid or modernisation projects. 
  • On-site display with switch contacts and Modbus output. 
  • Modbus delivers measured values for pressure, temperature and gas density. 
  • Compact design with only one process connection. 
  • Precision sensors enable high-accuracy gas density determination. 

Specifications

Brand

Nominal Size

  • 100

Accuracy Specifications

  • ± 2.5 % at ambient Temperature -20 … +60° C and with calibration Pressure in accordance with reference isochor (Reference diagram KALI-Chemie AG, Hannover, prepared by Dr. Döring 1979)

Scale Range

  • Vacuum and overpressure Range with measuring Span of 1.6 ... 16 bar (with an ambient Temperature of 20° C and gaseous phase)

Permissible Ambient Temperature

  • Storage: -40° to 60° C (-40° to 140° F)
  • Operation: -20° to 60° C (-4° to 140° F)

Process Connection

  • Stainless Steel, Spanner flats 22 mm
  • G 1/2 B per EN 837, Lower Mount

Pressure Element

  • Test method: Helium mass spectrometry
  • Gas-tight: leak rate ≤ 1 · 10-8 mbar · l / s
  • Stainless Steel, welded

Movement

  • Bimetal link (Temperature Compensation)
  • Stainless Steel

Dial

  • The scale Range is subdivided into Red, Yellow and Green Ranges
  • Aluminium

Pointer

  • Aluminium, Black

Case

  • Test method: Helium mass spectrometry
  • Gas-tight: leak rate ≤ 1 · 10-5 mbar · l / s
  • Stainless Steel, with gas filling

Permissible Humidity

  • ≤ 90 % Relative Humidity, Non-Condensing

Ingress Protection

  • IP65 per IEC/EN 60529

Weight

  • Approximately 1.4 kg

High Voltage Test 100%

  • 2 kV, 50 Hz, 1 s

  • Gas density monitoring in closed SF6 gas tanks
  • Remote monitoring of the SF6 condition

Documentation

Data Sheet

Operating Instructions

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