Thermocouple and RTD junction box is used to fix the terminal base and as a connector device, it plays a role in protecting the temperature sensing element from the erosion of the external atmosphere and making the external wire and the binding post in good contact, according to the measured temperature object and the site environmental conditions and requirements, in addition to the ordinary type junction box, also designed splash-proof type, waterproof type and plugging type junction box. If we assemble various types of junction boxes into thermocouples and RTD products, these products are accordingly splash-proof, waterproof and pluggable thermocouples and RTDs.
Unlike other types of instrumentation (e.g., display meters, regulators, etc.), thermocouples and RTDs are usually installed on field equipment, which generally has harsh environmental conditions.
In the past, junction boxes that were not uniformly designed not only had few varieties, but also had many disadvantages: for example, poor sealing performance, and screws on the lid and lid were easy to fall off (especially the screws for aerial work fell out and could not be found at all). In terms of standardization, wearing parts cannot be interchanged, such as screws, covers, terminal blocks, outlet hole bolts and sealing rings, etc., are not uniform and cannot be replaced. All of the above has brought great difficulties to the user unit.
The junction box of thermocouple and thermal resistance products of unified design, according to the opinions and requirements of the user unit, and the shortcomings of the above-mentioned existence have been overcome and improved, and the following four kinds of junction boxes have been designed, and these four kinds of junction boxes, in addition to not affecting the interchangeable dimensions are not stipulated, and the dimensions of other parts and components interchange have been uniformly stipulated.