The Siemens QBM81-5 is a differential pressure monitor designed to measure pressure differences within a range of 50 to 500 Pa. It operates on an input voltage between 24 and 250 VAC, and supports current loads from 0.01 up to 5 amps (3 amps continuous). The device features a 6.2 mm diameter connecting branch, and is intended to be mounted with the diaphragm in a vertical position, with the pressure connection facing downward. With an IP54 rating, it offers reliable protection against dust and water splashes. This pressure monitor is available through BSP Automation, providing a dependable solution for applications requiring precise pressure measurement and monitoring.