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Transmitter with Modbus Output - GDT-20

Brand: WIKA Alexander Wiegand SE & Co. KG
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The model GDT-20 transmitter is a multi-sensor system with digital output for the measurement parameters of pressure and temperature. Based on these measured values, the condition-related data can be determined.
Features
  • High-accuracy sensor technology. 
  • MODBUS output protocol via RS-485 interface. 
  • Ingress protection IP 65. 
  • Very good long-term stability and EMC characteristics. 
  • Compact dimensions. 
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The model GDT-20 transmitter is a multi-sensor system with digital output for the measurement parameters of pressure and temperature. Based on these measured values, the condition-related data can be determined.
Features
  • High-accuracy sensor technology. 
  • MODBUS output protocol via RS-485 interface. 
  • Ingress protection IP 65. 
  • Very good long-term stability and EMC characteristics. 
  • Compact dimensions. 
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Specifications

Brand

Measuring Ranges

  • Density: 0 ... 60 g/litre (8.87 bar abs. at 20° C)
  • Pressure reference: Absolute
  • Overpressure limit: up to 30 bar abs
  • Burst Pressure: 52 bar abs.
  • Pressure: 0 ... 16 bar abs.
  • Temperature: -40° to +80° C

Accuracy Data

  • ± 0.06 %, ± 10 mbar (0° to 80° C)
  • Pressure: ± 0.20 %, ± 32 mbar (-40 ... < 0° C)
  • Temperature: ± 1 K
  • Density: ± 0.60 %, ± 0.35 g/litre (-40° to +80° C
  • Specifications only valid for Clean, Gaseous SF6

Long-term Stability at Reference Conditions

  • Pressure: ≤ ± 0.05 % of Span/Year
  • Temperature: ≤ ± 0.10 % of Span/Year

Refresh Rate

  • Pressure: 20 ms
  • Temperature: 20 ms
  • Density: 20 ms

Process Connection

  • Transmission Fluid: Synthetic oil
  • G 1/2 B (Male), Stainless Steel

Case

  • Stainless Steel

Permissible Humidity

  • ≤ 90 % Relative Humidity, Non-Condensing

Ingress Protection

  • IP65, only when plugged in and using mating Connectors with the corresponding ingress Protection

Electrical Safety

  • Protected Against Reverse Polarity, Protected Against Overvoltage

Dimensions

  • Diameter: 48 mm
  • Height: 103 mm

Weight

  • Approximately 0.40 kg
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Applications

  • Permanent monitoring of the relevant gas condition parameters in closed tanks
  • For indoor and outdoor SF6 gas-insulated equipment
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