High Temperature Pressure Transmitters

High temperature pressure transmitters with a 4-20mA output, tolerant to high temperature applications such as steam, food processing & engine monitoring.

High temperature pressure transmitters are used in applications where the media temperature exceeds the temperature limits of standard pressure transmitters or where it is not possible to fit a stand off pipe, pigtail or other cooling device to reduce the media temperature.

Aerospace component testing hi-temp air pressure sensor for up to 300C with 20 barg range - Conduct accurate aerospace component testing with the DMP 331P pressure sensor. With a 20 bar g range and 300°C temperature capability, it's ideal for testing pneumatic valves, heat exchangers, and sensors under simulated operating conditions.
Diaphragm sealed high temperature pressure transmitter for -1 to 25 kg/cm² - Diaphragm sealed pressure transmitter for measuring over -1 to 25 kg/cm² on liquid with a flush type diaphragm up to a temperature of 190°C.
300 F protected 100 psi pressure transmitter - The IMP is a low cost pressure transmitter which has the option for a built-in process connector extender designed to reduce the temperature.
Seawater solution 60 inH2O hydrostatic pressure sensor for 190degF temperature - Hydrostatic pressure sensor with a measurement range of 0 to 60 inH2O gauge with a 4 to 20 mA output for measuring a seawater solution at a temperature of 190F.
25 psi steam pressure measurement with a transmitter & display - 50 psi range 4-20mA output pressure transmitter for use on 25 psi saturated steam.
Alternative 200 bar melt pressure transmitter with T/C - The current installed sensor has a 200bar pressure, 20mA full scale output, 1/2" 20UNF-2A thread
10 bar g steam pressure transmitter - High temperature pressure transmitter for use with steam pressures up to 10 bar gauge.
16 bar, 200°C steam pressure transmitter and gauge - Combined pressure transmitter and indicator in one package with the option for use with high temperature media such as steam at 200°C
300°C max temperature, 0 to 300 bar, high range pressure sensor - The 35X HTC can measure up to 300 bar (and higher if necessary) on media up to temperatures of 300 degC max.
Measuring steam pressure up to 10bar with analog/digital output - I am looking for an analog & digital type pressure sensor for use on steam temperatures from 0 to 200 degrees Celsius over 0 to 10 bar?
300 degC tolerant pressure transmitter for pressures up to 100 kPa g - High temperature pressure transducer with an output signal of 4 to 20 milliamps for measuring pressure up to 100 kPa.
Autoclave pressure sensor and display with 10 bar range - We are looking for a autoclave pressure sensor and display for connecting to a laboratory steam sterilising autoclave and operates at about 10 bar @160°C

Featured Product Series

Contents

Product Help

Specifying pressure transmitters for high temperature use

Process temperature

What will be the maximum process temperature reached in your application?

The sensor technology utilised in pressure transmitter has an operating temperature range which is adequate for most applications, but there are some which will require additional components to protect the sensor from heat damage.

Cooling mechanism

Typically the design approach is to reduce the temperature in the vicinity of the pressure transmitter by incorporating a mechanical cooling assembly to dissipate the heat.

The cooling assembly maybe filled with oil and separated from the process media by an isolation diaphragm.

Alternatively the cooling assembly can include hollow tubing shaped to increase heat transfer, which causes the process media allowed through, to reduce to a much lower temperature.

The choices of cooling mechanism fall into the following categories:

Add-on cooling adaptor

Add-on compact process media filled cooling adaptor with coiled capillary, hollow discs or fins for increasing surface area to act as heat sink for medium temperature protection.

Integral cooling element

Integral oil-filled isolation diaphragm seal shaped to increase surface area between sensor and isolation diaphragm to increase efficiency of cooling and provide for high temperature protection.

Capillary tube cooling

Integral oil, mercury or other fluid filled capillary with a long length and small diameter for extra cooling in very high temperature processes.

Ambient temperature

What will be the range of temperatures surrounding the pressure transmitter where it is installed?

This is an important consideration when dealing with high temperature processes or surrounding environments.

In applications where the process temperature is high, it is possible to use a pressure transmitter with a built-in cooling mechanism. This cooling mechanism often relies on the conduction and dissipation of heat to the surrounding air around the pressure transmitter. Therefore it is essential the ambient air temperature is lower than the process temperature. Also since the rest of the pressure transmitter connected to the cooling component is not protected from high temperatures, the ambient temperature should be lower than the device operating temperature range. This will ensure an efficient heat sink and protect the electronic components from thermal damage.

When it is not possible to install the pressure transmitter in a lower temperature environment, it is then necessary to use one that is completely protected from high ambient or process temperatures. These types of high temperature pressure transmitters do not need any cooling mechanism, and all components including the sensing technology, conditioning electronics, solder, adhesives, connectors and cables are rated to the maximum operating temperature.

Checklist for high temperature pressure transmitter requirements

Define your high temperature pressure transmitter requirements using this checklist:

Process temperature?
Cooling mechanism?
Ambient temperature?
Pressure range?
Output signal? 4-20mA
Electrical connection?
Process connection?
Process media type?