A method and apparatuses for installing a sensor on an active conduit is disclosed. An adaptor is attached to a corporation stop valve that has been installed onto an active conduit in the closed position. A sensor is positioned at a first position in the adaptor forming a seal between the sensor and adaptor. At the first position the sensor is automatically inhibited from moving further into the adaptor. The corporation stop valve is opened and the sensor is further inserted into the adaptor through the open corporation stop valve and into the active conduit.