Kromschroder Air pressure switch DL1E-1 84444010

The Kromschroder DL1E-1 air pressure switch, SKU 84444010, is a diaphragm-based pressure switch designed to monitor positive, negative, or differential pressure of non-aggressive gases, air, or flue gases. It has an adjustable pressure range of 0.2 to 1 mbar. The switch features a glass fibre reinforced PBT plastic body with low gas release, a NBR diaphragm, and is silicone-free. It weighs 200 g, with cover screw torque of 50 Ncm and strain relief facility torque of 60 Ncm. Electrical connection is via AMP plugs, and the micro switch complies with EN 61058-1, with safety class II per VDE 0106-1. The product is tested type sample and subject to production surveillance.

When selecting a replacement pressure switch of this type, verify the required pressure range, electrical connection type (e.g., AMP plugs), and mounting configuration. Ensure the switch is suitable for the medium (air, flue gas, non-aggressive gases) and that the pressure type (positive, negative, or differential) matches the application. Check the ambient and medium temperature limits and confirm the switch's safety certifications align with the system requirements.

Common failure modes for diaphragm pressure switches include diaphragm rupture or leakage, leading to loss of pressure sensing and incorrect switching. Symptoms may include burner lockout, failure to start, or erratic operation. Check for physical damage, contamination, or corrosion of the diaphragm and housing, and verify the switch operation by measuring continuity across the micro switch terminals while applying pressure.