This Lochinvar sensor is a critical component designed to monitor and regulate temperature in various heating systems. It is specifically engineered to be positioned at the lower part of the system, hence its designation as a 'lower sensor'. The device operates by detecting temperature changes, which it then communicates to the system's control unit. This information is used to adjust the heating output accordingly, ensuring optimal performance and energy efficiency. The Lochinvar lower sensor is compatible with a range of Lochinvar models, making it a versatile replacement or upgrade part. Its robust construction ensures durability and reliable operation under typical operating conditions.