The DW20S is a pressure switch manufactured by BIRCHER. With an air wave type design and a pressure range of 3-30 mbar, this switch provides accurate pressure sensing capabilities. Its red color and 3mm ID tube connection ensure easy identification and installation. The BIRCHER PRESSURE SWITCH, AIR WAVE TYPE, 3 - 30 MBAR, NORMALLY OPEN, RED, TUBE WITH 3 MM ID CONNECTION, is a high-quality and efficient solution for pressure monitoring and control applications.