PSR Series Tee Mounted Paddle Flow Switch -1/2" Brass with SPDT Reed Contact Switch

When you need a flow switch that is inexpensive, yet durable and simple but reliable, the KOBOLD paddle type PSR Flow switch will be effective. The paddle is located at one end of a balance arm. The arm is in immediate contact with a pre-stress leaf spring. A permanent magnet is located on the other end of the arm. This magnet actuates a reed contact which is positioned within a moveable housing outside of the flow. The reed contact then switches on or off depending on the position of the magnet and housing. The status of the switch may then be used to electrically control the fluid flow. The reed switch can be set to either normally open or normally closed. This paddle switch is effective as an external boiler switch. Many instant hot water boilers have switches that can get blocked easily. The PSR is an idea fix that will be durable and long lasting.