Trafag pressure transmitters are are suited to most requirements in very many of the harshest application areas. Apart from mature amplifier electronics – in the very latest products, equipped with ASIC – the technology of the associated pressure sensor is also of focal importance.
Trafag pressure transmitters are are suited to most requirements in very many of the harshest application areas. Apart from mature amplifier electronics – in the very latest products, equipped with ASIC – the technology of the associated pressure sensor is also of focal importance.
Special demands are placed particularly on signal processing by pressure transmitters.
Advantages in comparison with conventional electronics:
- Long-term drift <0.1percent FS.
- Comprehensive compensation possibilities via three-dimensional sets of characteristic curves
- Temperature range -40 to125°C.
- Supports all prevalent sensor technologies (thin-film, thick-film, piezo-resistive).
- Three independent input channels (pressure, temperature and one further digital auxiliary parameter).
- Signals of only just a few mV can be processed without problem (ie free of drift).
- The rectified output signals are available as pulse-width or pulse-density signals.
Using sputtering and CVD technologies, pressure sensitive thin film layers are deposited on the backside of a stainless steel membrane. The steel membrane is then welded to the pressure connection of a pressure transmitter to form a measuring cavity entirely made of stainless steel and free of O-ring. The complete assembly produces a very long-term stable signal and is highly temperature resistant. This offers:
- Excellent long-term stability.
- High temperature-resistance.
- Completely weld-sealed sensor system made of stainless steel alloys.
- No additional materials (eg O-rings) which could limit compatibility with certain sample media.
- Withstands very high overpressures.
- For gauge pressure ranges of 0–400mbar up to 0–2000bar.
Trafag AG is based in Männedorf, Switzerland. www.trafag.com
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