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Industry Information
Explosion-proof electrical contact pressure gauge
2012-3-16 8:37:27

Working performance of explosion-proof electric contact pressure gauge:

的隔爆外壳具有良好的隔爆性能,因此防爆电接点压力表对在正常工作过程中由于火花或电弧的影响,除了能承受壳体内部的爆炸性气体混合物在一旦引起爆炸时产生的爆炸压力外,并能有效地阻止由此产生的热能向外顺利传播,而只能在壳体内部沿着隔爆接合面的微小缝隙处缓慢地向外扩散。 The explosion- proof enclosure of the explosion -proof electrical contact pressure gauge has good explosion-proof performance. Therefore, the explosion-proof electrical contact pressure gauge can not only bear the explosive gas mixture inside the shell in the event of an explosion due to the impact of sparks or arcs in the normal working process. The explosion pressure generated can effectively prevent the thermal energy generated from spreading smoothly outward, and can only slowly spread outwards in the shell along the small gaps of the flameproof joint surface. At this time, the instantaneous temperature transmitted to the outside of the housing has fallen below the ignition temperature of the explosive gas mixture, so it will not cause an explosion. The working principle of the explosion-proof electrical contact pressure gauge is based on the detection element (spring tube in the measurement system). Elastic deformation, which causes the contacts in the electrical contact group to generate corresponding actions (close or open) through mechanical transmission, so that the circuit in the voltage control system can be turned on or off, thereby realizing automatic control of alarms and on-site instructions. purpose.

Main technical indicators of explosion-proof electric contact pressure gauge:

Accuracy level: 1.5

Scale range: 0 ~ 0.16; 0 ~ 0.25; 0 ~ 0.4; 0 ~ 0.6; 0 ~ 1; 0 ~ 1.6; 0 ~ 2.5; 0 ~ 4; 0 ~ 6; 0 ~ 10; 0 ~ 16; 0 ~ 25; 0 to 40; 0 to 60; -0.1 to 0.06; -0.1 to 0.15; -0.1 to 0.3; -0.1 to 0.5; -0.1 to 0.9; -0.1 to 1.5; -0.1 to 2.4MPa

Control mode: the maximum working voltage of the upper and lower limit slow contact switch: DC220V or AC380V;

Contact power: 10VA

Working position: Vertical installation. Environmental conditions: -10 to 50 ° C, relative humidity not greater than 80%, and explosive mixtures should belong to Group IIB T4 or lower. The working vibration and the rapid pulsation of the measured medium should not respond to the reliable operation of the meter contacts. influences.

Temperature influence: The displayed value is not greater than 0.4% / 10 ° C, and the set point is not greater than 0.6% / 10 ° C (the use temperature deviates from 20 ± 5 ° C).

Insulation strength: 50Hz sine AC 2000V for one minute Weight: 6kg


的隔爆外壳具有良好的隔爆性能,因此防爆电接点压力表对在正常工作过程中由于火花或电弧的影响,除了能承受壳体内部的爆炸性气体混合物在一旦引起爆炸时产生的爆炸压力外,并能有效地阻止由此产生的热能向外顺利传播,而只能在壳体内部沿着隔爆接合面的微小缝隙处缓慢地向外扩散。 The explosion- proof enclosure of explosion -proof electrical contact pressure gauges has good explosion-proof performance. Therefore, explosion-proof electrical contact pressure gauges can not The explosion pressure generated can effectively prevent the thermal energy generated from spreading smoothly outward, and can only slowly spread outwards in the shell along the small gaps of the flameproof joint surface. At this time, the instantaneous temperature transmitted to the outside of the housing has fallen below the ignition temperature of the explosive gas mixture, so it will not cause an explosion.

The working principle of the explosion-proof electrical contact pressure gauge is based on the elastic deformation of the detection element (spring tube in the measurement system), and the mechanical contact is used to drive the contacts in the electrical contact group to generate corresponding actions (close or open) to make the control The circuit in the pressure system can be switched on or off, so as to achieve the purpose of automatic control alarm and field indication.


使用、维护与检修: Use, maintenance and repair of explosion-proof electrical contact pressure gauges :

1. The instrument should be installed in the surrounding environment -20 ℃ ~ 40 ℃, the relative temperature is not more than 80%, and the altitude is lower than 2000m. At the installation site, the monthly average temperature is not higher than + 30 ℃. The surface of the meter generates frost, and the temperature of the measured medium is <70 ° C. (If it is used for the measurement of high-temperature medium such as steam, a temperature-resistant and explosion-proof electrical contact pressure gauge should be used). 2. The instrument must be installed vertically, and strive to maintain the same horizontal position as the measuring point, otherwise the additional error caused by the liquid level difference should be taken into account. 3, the electrical circuit of the meter, carefully check and carry out trial operation after connection. 4, the pressure part of the instrument generally uses the upper pressure of 3/4. 5. When adjusting the instrument order (by adjusting the knob, adjust the upper and lower limit pointers to the given value), first adjust the given value of the lower line and then adjust the given value of the upper line. 6. Turn off the power when opening the outlet box or adjusting the given value range.