Diaphragm pressure switches with micro switch (silicone-free) for monitoring gas pressures on industrial installations and heating systems, for gas, air and flue gas, also for biogas, DG..H/N with manual reset if the pressure rises above or falls below a switching point, for 24-250 V, with gold contacts also for 5-250 V, enclosure IP 54 (IP 65). EU certified pursuant to the Gas Appliances Regulation and to DIN EN ISO 13849. As special-design pressure switches as defined by VdTÜV Code of Practice "Druck 100/1" (Pressure 100/1), they are suitable for applications in firing installations for steam and hot-water generators in accordance with TRD 604, Para. 3.6.4, as well as class "S" pursuant to EN 1854. The units are certified up to and including PL e in accordance with DIN EN ISO 13849 and up to and including SIL 3 in accordance with DIN EN 61508. The suitability for certain applications can only be evaluated by taking into account the relevant safety-related complete system with regard to the requirements of DIN EN 61508 or DIN EN ISO 13849.
All pressure switches DG..G with gold contacts can be used with an isolating amplifier in Zone 1 and 2 hazardous areas.
The pressure compensation holes of series DG..U, B, H, N, I have a defined ignition protection in terms of the safety measure for enclosed break devices for Group IIA gases and vapours. They can therefore be operated on pipes with Zone 2 explosive atmospheres.