Kromschroder Gas pressure switch DG10T-21N 84447810

The Kromschroder DG10T-21N is a gas pressure switch with SKU 84447810, designed to monitor gas, air, and biologically produced methane pressures. It has a pressure range of 1–12 mbar, displayed on both inch and mbar scales. The switch features an NPT internal thread, a 1/2 NPT conduit thread, and a supply voltage of 120 V. It is protected to IP54 and includes an adjustment handwheel for setting the switching point.

When selecting a replacement pressure switch of this type, ensure the pressure range, connection thread size, and conduit thread match the existing installation. Verify the supply voltage and protection class are compatible with the system. The switch should be mounted in the correct orientation and the handwheel used to set the desired switching point according to the system requirements.

Common failure modes for this type of pressure switch include diaphragm rupture, contact welding, or loss of calibration. Symptoms may include the burner failing to start, intermittent shutdowns, or the switch not responding to pressure changes. Check for physical damage, verify the setpoint with a manometer, and test electrical continuity across the contacts.