Ace Glass 8648-164 25.4 mm O. D. x 10.2 cm (4") Pressure Tube with Plunger Valve & Thermowell 15 mL #15 Ace-Thred

Rugged, heavy wall tube, similar to listing above, except glass plunger valve has a 5 mm I. D. thermowell for a thermocouple wire or sheathed probe up to 1/8" (3.2 mm) O. D. Closed bottom plunger has a hole inside that when positioned in relation to O-Ring seal, allowing Tube to be opened or closed to the atmosphere (i.e., pull to close, push to open). Step-down extension on upper end of plunger acts as stop in-bushing. Complete item consists of Tube (#15 Ace-Thred), PTFE Bushing with FETFE® O-Ring, and Plunger Valve with Thermowell.