IFM Electronic SBU323 flow sensor with reverse flow prevention This sensor is offered as a flow monitor with the following features: - **flow monitor**: the ability to monitor the flow of liquids. - **Working voltage**: 10 to 30 V DC (suitable for SELV/PELV). - **PNP output**: sensor output type. - **M12 connection**: standard connector for easy connection. - **Applications**: suitable for machine tools and internal cooling of drills. This device is suitable for applications that need to prevent the return flow of liquids.