Lochinvar & A.O. Smith 100208556 Sensor Kit 321894-708 Designed for high-pressure durability and

Designed for high-pressure durability and leak-free performance

always verify your center-to-center pulley distance before installation

Because the Setra 230 uses a single diaphragm to measure the difference between the high and low ports directly

By organizing control circuit wiring in a centralized block

Robust Overpressure Protection: Designed to withstand 2x full-scale proof pressure and 5x full-scale burst pressure

Lochinvar & A.O. Smith 100208556 Sensor Kit 321894-708 Designed for high-pressure durability andThe Lochinvar & A. O. Smith 100208556 Limit Flue Sensor Kit is a critical OEM replacement component engineered for precise monitoring of exhaust temperatures in high efficiency heating systems. This flue limit rated sensor acts as a primary safety mechanism, detecting excessive heat within the venting system to prevent heat exchanger damage and ensure professional grade operational safety. Designed to replace legacy part numbers 100170535 and