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GE Sensing and Inspection has collaborated with RTP to develop an Atex-approved static dissipative compound for the exterior housing of the DPE 104-IS gauge.

Requirements for the DPE 104-IS, a microprocessor-controlled digital pressure gauge, included ESD protection, good impact strength and colourability for brand identification.

RTP recommended using a Permastat Plus 2500 Series static dissipative PC/ABS compound pre-coloured bright yellow for the gauge’s exterior housing.

Dr Joel Bell, product development engineer at RTP, said: ‘PC/ABS alloys exhibit excellent impact strength and their easy processability provides a smooth surface finish.

‘Permastat Plus materials meet Atex Directive and IECEx Scheme static dissipation requirements with a surface resistivity of 10E7 to 10E8 ohm.’ All Permastat grades from RTP provide permanent static protection at all humidity levels.

Their all-polymeric chemistry allows them to be fully coloured.

Jim Henke, global product manager at GE, said: ‘Using the RTP compound allowed our gauge to comply with the Atex standards for equipment used in potentially explosive environments.’ GE Sensing and Inspection’s DPI 104-IS is a simple-to-use digital pressure gauge with a large, easy-to-read display.

It can be used for process monitoring and testing and calibration applications.

It can monitor processes for mediums such as gasses (air, nitrogen or propane) or liquids (LNG, heating oil or machine oil).

In process applications, the gauge is typically mounted directly to a pipeline or storage vessel.

When used for testing and calibration, the pressure gauge is used as a portable device in conjunction with a hand pump to calibrate dial or mechanical gauges and pressure switches.

The DPI 104-IS is available in pressure ranges up to 20,000psi (1,400bar).

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