Product features

The standard ground joint thermometer jacket tube is a kind of standard joint instrument in organic chemical experiments. It is used to connect the glass joint with a general straight laboratory thermometer, which is equivalent to the traditional rubber stopper. It is usually made of glass tube. The outer wall of the lower end is processed into a standard ground joint, such as specifications like 19/26, and can be closely connected with corresponding standard ground joint instruments. The upper end may have a plastic nut fixed by threads, and there is a matching rubber washer set inside, which is used to fix the thermometer. Some thermometer jacket tubes also have ventilation holes in the middle part, which are used to communicate with the atmosphere to ensure operational safety.

The standard ground joint thermometer jacket tube is generally made of borosilicate glass, which has good chemical stability and thermal stability. It can withstand certain temperature changes and chemical corrosion, and is not likely to react with the chemicals in the experiment. Moreover, the material is pure with few impurities, and will not interfere with the experimental results. At the same time, the glass is transparent, which is convenient for observing the reading of the thermometer and the situation during the experiment. Compared with the traditional rubber stopper, the standard ground joint thermometer jacket tube has the characteristics of standardization and normalization. Installing and fixing the thermometer is more convenient and accurate, and it can ensure that the thermometer is vertically inserted, thus improving the accuracy of temperature measurement. In addition, the ground joint connection has good sealing performance, which can effectively prevent gas leakage or liquid volatilization during the experiment, and also avoids the problem of easy aging of the rubber stopper after long-term use.

Product details

We can produce different thermometer jacket tubes as per customer’s requirements.We can also print your logo on the thermometer jacket tubes if the quantity is large,please feel free to contact us online.

Product specifications 

Product applications

(1) Distillation experiment: In the distillation device, a fixed thermometer is connected to the distillation head through a ground joint to accurately measure the steam temperature, determine the boiling point range of the fraction, and monitor the distillation process.

(2) Reflux experiment: In the reflux device, the thermometer is fixed to the ground joint of the reaction vessel through a thermometer sleeve to monitor the reaction temperature in real time and ensure that the reaction is carried out at an appropriate temperature.

(3) Other experiments: In experiments that require precise temperature control, such as melting point determination and organic synthesis reactions, the thermometer can be fixed on the corresponding instrument to ensure accurate temperature measurement and provide reliable temperature data.