and Pennco units

multiple TFB120-SR actuators can be connected in parallel

Durable Construction: Features synthetic fibers and premium materials designed to withstand repeated vacuum cleaning cycles for extended service life

technicians can ensure optimal torque delivery and quiet operation in residential heating applications

Built with a rugged design to withstand demanding mechanical room conditions

Hydrolevel 48-3250-58 Sensor 320788-703 and Pennco unitsAs a seasoned technician, you know that a failed sensor on a Hydrostat 3250 Plus or similar controller can take down a high efficiency boiler system at the worst possible time. The Hydrolevel 48 3250 58 Replacement Sensor is a 4 foot (48 inch) thermistor assembly specifically engineered for Hydrostat boiler controllers. This OEM replacement part is critical for maintaining accurate thermal targeting and active low water cut off (LWCO) functionality.