878x Hybrid Gas Density Monitor with analogue output

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Main features

  • Exact switching following isochore at all temperatures
  • No contact bouncing
  • Independent, galvanically separated circuits
  • Continuous analogue output signal for gas density
  • Long term drift free sensor output signal
About
The hybrid gas density monitor combines self-acting monitoring with high-performance microswitches and continuous density measurement of insulating gases in one device. It covers demanding applications and maintains highest accuracy over a very wide temperature range. Trend analysis helps to detect possible leakages sooner, provides data for preventive maintenance measures and therefore facilitates compliance with greenhouse gas regulations. This precise and maintenance-free hybrid density monitor is reliable in operation over decades for indoor and outdoor applications.

Technical Data

More Information
Product code 878x
Designation Hybrid Gas Density Monitor with analogue output
Measuring range Mechanical monitoring, measuring range absolute: 0...1.1 MPa (0...1100 kPa) Electronic monitoring/sensor, measuring range absolute: 0...0.85MPa SF6 @ 20°C 0...56.1 kg SF6 /m3
Measuring principle Mechanical monitoring: Principle: Reference gas measurement Electronic monitoring: Principle: Oscillating quartz measurement
Designation of application Gas Density Monitor for SF6 and other gases with output signal for continuous monitoring
Output signal Mechanical monitoring: floating change-over contact Electronic monitoring/Sensor: analogue: 6.5...20 mA current loop Output signal 6.5...20 mA current loop 0...0.85MPa absolute SF6 @ 20°C 0...56.1 kg SF6 /m3
Ambient temperature -40°C ... 80°C
Applications

High voltage technology

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