Flow Sensing. TE's flow switches are suitable for hot and cold potable water due to rugged brass housings and the ability to operate from a small head of water. They are typically mounted in a well-defined channel, directly in the flowing media. Our flow switches are designed for water control, power shower, central heating systems, circulation pump protection, cooling and leak detection. They feature reed switch reliability and are easy to install. Materials include PPE and brass, as well as glass filled PPS for durability and material compatibility.