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Industry Information
Electric contact pressure gauge for measuring pressure of fluid medium without explosion danger
2012-2-18 10:55:08

适用于测量对铜合金无腐蚀、无爆炸危险、非结晶的各种液体、气体等介质的压力。 The electric contact pressure gauge is suitable for measuring the pressure of various liquids, gases and other mediums which have no corrosion, no explosion hazard, and are non-crystalline to copper alloys. The meter can be used with the corresponding electrical components to achieve the two-position automatic control and signal (alarm) of the maximum or minimum pressure value set in advance for the pressure system under test.
It consists of a measurement system, an indicating device, a magnetically assisted electrical contact device, a housing, an adjustment device, and a junction box. When the measured pressure acts on the spring tube, the corresponding end of the spring tube produces a corresponding elastic deformation—displacement, which is amplified by the transmission mechanism and then indicated by the indicating device on the dial. At the same time, when the pointer drives the movable contact of the electrical contact device to contact the contact (upper or lower limit) on the set pointer, the control system turns on or off the circuit to achieve the purpose of automatic control and signal alarm.
The electric contact signal pin of the electric contact device is equipped with an adjustable permanent magnetic steel, which can increase the contact suction and speed up the contact action, thereby making the contact reliable, eliminating the arc, and effectively avoiding the instrument due to the working environment vibration or medium. Pressure pulsations cause frequent contact closures. Therefore, the meter has the advantages of reliable operation, long service life, and large contact switch power.
Contact device electrical parameters and control form Contact power Maximum working voltage Maximum working current Control form
30VA (resistive load)
220VDC or 380VA.C1A upper and lower limits, double upper limit, double lower limit


一些维护常识 Some common sense for maintenance of electric contact pressure gauge

1. The maximum current passing through the electrical contact is not allowed to exceed 3A (Ampere), otherwise it is self-sufficient. 2. The pressure gauge should be installed vertically. Avoid collision and vibration during handling and installation. 3. The pressure gauge should be used in places where the ambient temperature is -40 ° C to + 70 ° C and the relative humidity is not more than 85%, and the vibration or the rapid pulsation of the measured medium does not affect reliable contact and accurate readings. 4. After the installation and connection of the pressure gauge's electrical circuit, check it carefully and perform a trial operation. 5. When adjusting the given value of the pressure gauge, it must be carried out with the help of a slotted screwdriver. 6. When measuring the static load, the pressure gauge can be used up to 3/4 of the upper measurement limit, and when measuring the alternating load, it can be used up to 2/3 of the upper measurement limit. For the instantaneous measurement, it can be used up to the upper measurement limit. 7. Isolation devices and buffer devices should be added when measuring mediums with large viscosity and sudden fluctuation pressure. 8. The pressure gauge should be checked frequently (at least once every three months). 9. The pressure gauge should always be kept dry and clean during use and properly maintained.

适用于测量无爆炸危险的流体介质的压力。 Electric contact pressure gauge is suitable for measuring the pressure of fluid medium without explosion danger. Generally, the electrical contact pressure gauge can be used with corresponding electrical devices (such as relays and contactors) to achieve the purpose of automatic control and signalling (alarm) for the pressure system under test (control). Structural principle of electric contact pressure gauge: The electric contact pressure gauge is composed of a measuring system, an indicating device, an electric contact device or a magnetically assisted electric contact device, a housing, an adjustment device and a junction box. The working principle of the electric contact pressure gauge is based on the spring tube in the measurement system under the pressure of the measured medium, forcing the end of the spring tube to have a corresponding elastic deformation-displacement. The pointer (along with the contacts) fixed on the gear shaft indicates the measured value on the dial one by one. At the same time, when the electric contact pressure gauge is in contact with the contact (upper limit or lower limit) on the setting pointer (dynamic break or close), the circuit of the control system can be disconnected or connected to achieve automatic control and The purpose of the letter. Electric contact pressure gauges are divided into two types: direct electric contact pressure gauges and magnetically assisted electric contact pressure gauges. There are two types of on-site installation and flush-mounted installation. Maximum working voltage of electric contact pressure gauge: DC220 or AC380V. Electric contact pressure gauge contact power: 10VA (resistive load), magnetically assisted type is 30VA. The control method of the electric contact pressure gauge is: upper and lower limits, double upper limit, double lower limit. The environmental conditions of the electrical contact pressure gauge are: -40 to 70 ° C, and the relative humidity is not greater than 85%. Temperature environment: When the use temperature deviates from 20 ± 5 ° C, the set point error change is not greater than 0.6% / 10%.