878x Hybrid gas density monitor with switching contacts and current output

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Main features

    • Exact switching output at all temperatures
    • Fully temperature compensated by design
    • No contact bouncing
    • Continuous density measurement
    • Long term drift free sensor output signal
    • Maintenance free indoor and outdoor use
About

Swiss based Trafag offers precise, reliable and maintenance-free instruments, developed for density monitoring of SF6 and alternative gases. Measurement is based on the gas density reference principle or the patented quartz tuning fork technology. Hybrid monitors combine both principles in one instrument. Thus offering the most reliable solution on the market by directly measuring the gas density.

Technical Data

More Information
Product code 878x
Designation Hybrid gas density monitor with switching contacts and current output
Measuring range

max. 0 ... 60 kg/m3
max. 0 ... 1250 kPa abs. @ 20°C

Measuring principle
  • Monitor: Absolute pressure reference gas measuring system
  • Sensor: Oscillating quartz
Designation of application Density monitoring and measurement in insulating and quenching gas
Output signal
  • Monitor: Floating change-over contact (SPDT)
  • Sensor: 4 ... 20mA, 6.5 ... 20mA
Ambient temperature -40°C ... +80°C
Applications

Medium voltage technology
SF6 and variety of alternative mixed gases

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