Ex HS 98 Position Switches with Analogue Output for Ex Zones 1 & 21

Phil Black - PII Editor 12/01/2016

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The Ex HS 98 position switch, which the steute business division “Extreme” has demonstrated at the SPS IPC Drives, sets itself apart from all other Ex position switches in the comprehensive steute range due to one very striking feature.

Instead of using conventional “on/off” technology, it emits an analogue signal which corresponds to the position of the actuator or plunger, detected by an integrated Hall sensor.

Depending on the variant chosen, the sensor supplies the output signal in one of the three established standards 0 … 20 mA, 4 … 20 mA or 0 … 10 V.

This feature has been realised within the popular Extreme position switch 98 series, characterised amongst other things by a robust, anti-corrosive, aluminium housing with a stainless steel lid, high protection classes and dimensions fulfilling the DIN EN 50041 standard. Different actuators can be mounted in offset positions 4 x 90o.

This means that the analogue position switch can be integrated flexibly within its surrounding construction, not least because it can also be individually programmed in the factory and thus ideally adapted to suit the application in question.

The explosion-proof 98 HS variant is ATEX/IECEx-approved for use in gas Ex zones 1 and 2, as well as dust Ex zones 21 and 22. Its combination of features makes this robust analogue position switch perfectly suited to applications such as the precise position monitoring of flaps, valves and other control elements installed in explosive environments.