The HC12840SS is the replacement pressure transducer for Metron fire pump controllers, covering both diesel and electric models. The transducer converts fire-line water pressure into an electrical signal, giving the controller the live reading it uses to decide when the pump must start.
When a transducer drifts or fails, the controller may start the pump at the wrong pressure, cycle erratically, or stop responding to pressure drops entirely — problems that typically surface during routine churn or flow testing. Replacing the sensor restores accurate pressure sensing without touching the controller's logic.
This part fits Metron diesel and electric fire pump controllers that specify P/N HC12840SS; it is not the transducer for Tornatech or GPX-style panels, which we list separately. Unsure about fitment? Call veteran-owned Cybertronic Controls in Hammond, Louisiana at 985-351-5681 before you order.