CONSTANT PRESSURE AIR OR VOLUME THERMOMETER Constant Pressure Air Or Voltmeter Thermometer – Physics Instrument Complete on wooden stand without mercury with borosilicate glass tube. The apparatus consists of detachable air thermometer bulb of about 40 mm diameter, connected to mercury tube with zero index through a three-way stopcock. Reservoir tube sliding on vertical support rod with clamp along side scale graduated 0 to 500 × 1 v mm. A copper vessel, , surrounds the bulb and is supported on top of a detachable shelf with thermally insulating screen towards the stand. Complete assembly mounted on a polished wooden stand with base in the form of a small tray for mercury. All glass parts of borosilicate glass. Complete with pressure rubber tubing and copper vessel
