Glassware Thermometer Adapter

A thermometer adapter is used to create a vacuum-tight, adjustable seal around a thermometer when it needs to be inserted into a distillation head or a flask.

For metal thermometer probes submerged in an aggressive acid, we recommend using a Pocket Thermometer Adapter instead. Even "acid-resistant" stainless steel probes will eventually pit or degrade when submerged in hot, aggressive acids.

The adapter comes in three parts: a glass body with a ground joint (e.g. 14/23 or 19/26), a plastic screw cap, and a silicone or rubber ring (grommet).

How to assemble it:

• Slide the plastic cap onto the thermometer, followed by the rubber ring.
• Push the thermometer through the top of the glass adapter body, and slide it up or down until the bulb sits exactly where you need it, usually just below the side-arm of a distillation head, to measure vapour temperature accurately.
• Screw the plastic cap onto the threaded top of the glass adapter. As you tighten it, the cap compresses the rubber ring against the thermometer to create a leak-proof, vacuum-tight seal.
• Insert the ground glass joint of the adapter into your labware, such as a still head. A thin layer of vacuum grease on the ground joint helps stop it seizing or leaking under vacuum.

A few safety notes: don't over-tighten the cap, just enough to stop the thermometer sliding is enough, since over-tightening can snap the thermometer or crack the glass threads. If the thermometer is hard to slide through the rubber ring, use a drop of glycerin or water as a lubricant rather than forcing it. Make sure the adapter's joint size (e.g. 14/23) matches the socket on your glassware before you start.

Specifications

• Material: Clear 3.3 borosilicate glass
• Joint Size: select from drop down
• "O"-ring: GL14 open top compression cap and O-ring included
• Brand: OMSONS
• Product of India