Kromschroder Indicating pressure gauge KFM250RB100 03200109

The Kromschroder KFM250RB100 is an indicating pressure gauge with a measuring range of 0–250 mbar, designed for visual monitoring of static pressure in gas supply and heating systems. It features a capsule measuring element, a 100 mm dial diameter, and an accuracy class of 1.6 with a permissible deviation of ±0.6%. The gauge has a G 1/2" B connection thread, a stainless steel housing, and is rated IP54. It operates within an ambient temperature range of -20 °C to 60 °C, weighs 453 g, and has dimensions of 140 x 100 x 50 mm. The instrument includes a zero adjustment screw and is suitable for use with natural gas, LPG, or clean dry air; for biogas, a special seal is required.

When selecting a replacement pressure gauge of this type, ensure the measuring range and connection thread match the existing installation. The gauge should be chosen so that the normal working pressure falls near the middle of the scale for optimal accuracy. Verify the thread size (e.g., G 1/2" B) and confirm the gauge is suitable for the intended medium (gas or air). Mount the gauge horizontally as recommended, and inspect the sealing gasket or O-ring during installation to prevent leaks.

Common failures of indicating pressure gauges include a stuck pointer, loss of tightness, or inaccurate readings. These issues can lead to incorrect burner adjustment, resulting in excessive fuel consumption, unstable combustion, or emergency shutdowns. If the gauge shows erratic readings or fails to respond to pressure changes, check for mechanical damage, contamination, or seal degradation.