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Steam Pressure Transducers

Amplified voltage output transducers for use in applications for measuring pressure of high temperature steam such as sterilizing autoclaves, food processing and power generation.

These voltage signal output pressure transducers include integral cooling features for protecting the transducer electronics from steam temperatures which would otherwise cause damage to standard industrial pressure transducers.

  • DS201P High Range Flush Pressure Gauge, Switch and Sensor
  • DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor
  • DMP331P Hygienic Flush Pressure Transmitter
  • DMK331P Flush Diaphragm Pressure Sensor
  • 35X HTC High Temperature Digital Pressure Sensor (< 300 degC)
  • 35X HTT High Temperature Compensated Pressure Sensor
  • 20 bar absolute steam pressure transducer
  • Vacuum and steamer pressure transducer with -30 inHg to 100 psi range
  • -0.9 to +2.2 bar g Autoclave pressure transducer
  • 180 degC pressure sensor for saturated steam up to 10 bar

Contents

  • Product Help
    • Steam temperature
    • Maximum operating temperature
    • Higher temperature steam protection
    • Checklist for steam pressure transducer requirements

Product Help

Steam temperature

Is steam temperature always the same value?

Under standard atmospheric conditions water turns to a gas and produces steam at a temperature of 100 degC / 212 degF, however this boiling point temperature is dependent on the pressure. As the pressure increases, the point at which water turns to a gas is a higher temperature. For example at a pressure of 10 bar gauge, the temperature at which steam is produced is 184 degC / 363.2 degF.

Maximum operating temperature

What is the highest operating temperature limit of the pressure transducer?

When specifying a pressure transducer for use on steam, it is important to determine the steam temperature by using a published table, online calculator or formula. At higher pressures it will become increasingly difficult to find suitable pressure transducers because many will not have a sufficiently high enough maximum operating temperature.

Higher temperature steam protection

How are pressure transducers protected from steam at higher temperatures?

Many of the pressure transducer technologies that are widely used by manufacturers are not suitable for direct contact with high temperature steam, with typical operating limits from 100 to 125 degC / 212 to 363.2 degF. Therefore it is necessary to add protection components between the pressure transducer and steam to act as a heat sink to cool the media in close proximity to the transducer.

The high temperature protection components vary in mechanical design; some allow the steam to pass through, whilst others will isolate the steam using an oil filled isolation diaphragm seal. The majority of these design concepts rely on providing sufficient surface area of thermally conductive material to make contact with the surrounding cooler ambient air, and a restriction to reduce steam volume or a membrane to block it altogether, to increase the cooling effect.

Checklist for steam pressure transducer requirements

Define your steam pressure transducer requirements using this checklist:

  1. Pressure range?
  2. Voltage output type?
  3. Accuracy?
  4. Electrical connection?
  5. Media type? Steam
  6. Maximum media temperature?
  7. Maximum ambient temperature?
  8. Process connection?

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