How to choose the pressure type thermometer

Pressure type thermometer is a closed system, composed of bulb, capillary and spring element, the temperature inside the package as working medium, when measuring temperature, insert the bulb of the measured medium, affected by the medium temperature, temperature package internal working medium volume or pressure changes, the capillary pass this change to elastic component, components elastic deformation, displacement of the free end, with the aid of transmission mechanism, drive the pointer on the dial indicates the degree of temperature values. Has a simple structure, high mechanical strength, the structure of the oil filled pressure type thermometer can shock. Pressure type thermometer at the time of temperature measurement can be connected to the computer, now can be connected to the computer pressure type thermometer is more popular. Visible parts of the pressure type temperature time of choose and buy, want to have no obvious flaw, scratch or damage; Thermometer glass should maintain a transparent light, without oil. Pressure type thermometer calibration table card, logo and color to printing content must be complete and clear. Installation, the size of the thermal components, pointer, pan, cover, connector, connecting pipe material and size and accessories should be accorded with the requirements of the drawings or the choose and buy. Pointers can't paint tumor, burr; Joint thread must not have crack, collapse, ground bald and sliding tooth phenomenon; Connecting pipe should be orderly winding and strapping; The end of the temperature sensing element without welding pits; The attachment parts intact. Pressure type thermometer must be set the appropriate bubble bag or plastic bag, and put the corresponding outer. To give an accurate and precision, in the process of the pointer should be smooth, no jump needle, needle card phenomenon. Is the most important benefits of pressure type thermometer can achieve the goal of remote display temperature measurement. And does not need power supply, stable and reliable security, explosion-proof performance is good, is commonly used in the production of industrial instrumentation.