The 3-inch insertion depth is specified to ensure the sensor reaches the optimal point in the airflow path for accurate temperature sensing

Since this is a Type III thermistor

This sweat tee is designed for use with any copper tubing that meets ASTM B88 (plumbing) or ASTM B280 (ACR) standards

or obvious physical signs like bulging or leaking oil from the capacitor casing

meaning it opens at 170

Conbraco 26-105-28 Gauge The 3-inch insertion depth isThe Conbraco 26 105 28 is a professional grade 1 2" Male NPT compression gauge cock designed for reliability in low pressure steam and liquid monitoring systems. Engineered with a polished brass body, this ball valve type 1 2 inch gauge cock provides a secure, leak free connection for industrial boiler sight glasses and instrumentation manifolds. Rated for a maximum working pressure of 125 PSI, it features a durable composite plastic wheel for smooth