The 1200 unit is an adjustable version of the 1100 flow sensor. The 1200 in line flow switch offers the same accuracy and ruggedness of the 1100 model with an additional field adjustable set point. The switch in this unit is silicone potted in a factory replaceable capsule to permit a very high vibration resistance as well as keeping it repairable in the event of failure. This model has a true globe-shaped one-piece cast body that yields a lower pressure drop and minimises turbulence while keeping the pressure capabilities very high.
The unit operates with liquid flowing through the housing. When the flow is below the “set point” the liquid flows around the shuttle, as the flow rate increases the magnet-equipped shuttle starts to lift up compressing the spring until the flow rate reaches the set point where the magnet actuates a hermetically sealed reed switch inside the stem. Flow above the set point passes by the shuttle without any issues until the flow rate begins to decrease where the spring begins to push the shuttle back down to resting position until the magnet extends far enough away from the switch causing it to de-actuate. Flow rates below the set point do not affect the unit and do not cause it to actuate. Adjusting the vane permits an amount of substance to bypass the piston entirely, this effectively raises the set point.
- Coolant systems
- HVAC equipment
- Pump & bearing protection devices