Triple-walled, quartz, immersion well for use at temperatures as low as –78 °C

The innermost wall is held in place via a stopper and permits a carefully positioned, PTFE water inlet tube to extend below the lamp bottom. Inner tube is removable and may be interchanged with borosilicate glass tubes. One size tube fits both wells. Outer chamber consists of a 89061-250 drilled neoprene stopper, 89061-026 spacer O-Rings, metal water inlet, connecting tube and PTFE tubing.

With a standard taper 60/40 center inner joint. Outer two walls are permanently sealed together and the space between evacuated. This keeps lamp coolant water from warming the reactant and also prevents coolant water from freezing, thus lamp emits correct wavelengths and operates at optimum temperature for longer life