Kromschroder Gas pressure switch DG500SG-3 84447491

The Kromschroder DG500SG-3 is a diaphragm pressure switch designed to monitor and control pressure changes in systems. It has an adjusting range of 100–500 mbar and is suitable for media such as NH3, O2, and air. The switch features gold-plated contacts, screw terminals, and a glass fibre reinforced PBT plastic housing with low gas release. It is silicone-free, has a protection class of IP54, and is RoHS compliant pursuant to 2002/95/EC. The medium temperature range is -15 to 80 °C, and the storage temperature range is -40 to 80 °C. The weight is 0.321 kg.

When selecting a pressure switch of this type, ensure the adjusting range, medium compatibility, and electrical connection match the system requirements. The connection thread is M16 x 1.5, and the cable clamping range is 4–10 mm. The switch must be installed with proper sealing and orientation to avoid diaphragm damage. Verify the protection class (IP54) suits the installation environment.

Common failures include diaphragm rupture or leakage, leading to loss of pressure monitoring. Symptoms may include erratic burner operation, failure to detect pressure changes, or safety shutdowns. Check for physical damage, contamination, or incorrect wiring. Test the switch by applying pressure and verifying contact operation.