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Dustcollectors and HVAC-installations which are placed in a ATEX-zone, must be equipped with suitable controls and measuring devices. In order to detect the saturation of filtermedia, a pressure differential module is extremely important!
Currently a pressure differential module is introduced which is to be applied in zone 22 (dust). The pressure drop over the filter is measured and several signals are generated: start/ stop cleaningfunction and alarm. The actual value is read out locally and by means of 4-20mA analog signal.

Specifications pressure differential module HE 5421:

- To be used in zone 22
- Measuring range: 0...25/30/40/50/70/100mbar
- Outputs: 1 x Analog 0(4)-20 mA/ 1 x Relay – alarm/ 1 x Relay – for cleaning
- Sizes: 122 x 120 x 55 mm (H x W x D)
- Display: 4-digit/ 7-segments
- Media: Air and dry non-agressive gasses
- Pressure connections: G¼” female
- Electrical connection: 230 V AC/ 24 VDC
- Protection class: IP 65

Explosion protection: II 3D T60°C IP65 Zone 22