Magnetic assisted electric contact pressure gauge

Magnetic assisted electric contact pressure gaugeBased on the different requirements of operating conditions, various types of products with functions such as shock resistance, corrosion resistance, ammonia use, corrosion resistance, and diaphragm isolation have been developed on the basis of ordinary magnetic assisted contact pressure gauges.

Accuracy level: 1.6 level.
Measurement range: 0-0.1~0-60MPa, -0.1-0, -0.1-2.4MPa.

Magnetic assisted electric contact pressure gauges are widely used in industrial sectors such as petroleum, chemical, metallurgical, power, and machinery, as well as in mechanical and electrical equipment to measure the pressure of various fluid media without explosion hazards.

Usually, instruments are used in conjunction with corresponding electrical components such as relays and frequency converters,

It can achieve the purpose of automatic control and signaling (alarm) of the measured (controlled) pressure system.

Magnetic assisted electric contact pressure gaugestructural principle

The electric contact pressure gauge consists of a measuring system, an indicating system, a magnetic assisted electric contact device, a housing, an adjusting device, and a junction box (plug socket).

The working principle of an electric contact pressure gauge is based on the spring tube in the measurement system, which, under the pressure of the measured medium, causes corresponding elastic deformation and displacement at the end of the spring tube. With the help of a pull rod and the transmission of a gear transmission mechanism, the measured value is gradually indicated on the dial by the indicator on the fixed gear (along with the contact). At the same time, when it comes into contact with the contact point (upper or lower limit) on the set pointer (dynamic breaking or dynamic closing), it causes the circuit in the control system to be disconnected or connected, in order to achieve automatic control and send alarm signals.

Magnetic assisted electric contact pressure gaugeInstallation method:

1. Axial belt front

2. Radial infinity

3. Radial belt front

Electrical parameters of contact points

Working voltage (highest): 380VAC; 220VDC

Maximum working current: 1A

Continuous current; 0.6A

Zui High Power: 30W

Electric contact pressure gauge working temperature: -25 ℃~55 ℃

Upper limit of work pressure: not exceeding 2/3 of the instrument upper limit

The vibration frequency of the working environment shall not exceed 25Hz, and the amplitude shall not exceed 0.5mm

Magnetic assisted electric contact pressure gaugeProduct Category

Considering that this series of instruments not only has the characteristics of novel design, reliable structure, complete variety and specifications, good action stability, and strong adaptability, but also has the advantages of combined measurement and control, simple installation, and low maintenance, it is generally a pressure measurement and control instrument for pressure controllers without indication, switching difference adjustment, and external setting devices.

To meet the different requirements of the tested object (such as shock resistance, corrosion resistance, and explosion resistance), shock resistant electrical contact pressure gauges, corrosion-resistant electrical contact pressure gauges, and explosion-proof electrical contact pressure gauges that meet the requirements can be selected.

The ordinary type is suitable for measuring the pressure of gases and liquids that have no corrosive effect on copper alloys and iron.

The main pressure measuring components and instrument housings of the anti-corrosion type are designed with stainless steel materials, which are suitable for measuring the pressure of gases and liquids with strong corrosiveness.

The shock resistant type ensures no vibration display by filling the body with oil and using liquid damping, making it suitable for measuring places with strong medium pulsation and large environmental vibrations.

Explosion proof type is suitable for hazardous areas with explosive mixtures in the environment

Principles of Electrical Appliances

Taking the control of the compressor motor as an example: when the pressure of the gas storage tank reaches the lower limit, it will automatically start, and when it reaches the upper limit, it will automatically stop.

The control process is as follows: when the pressure reaches (or when the power is turned on) *, the movable contact (common terminal of the power supply) of the electric contact pressure gauge is connected to the lower limit contact, relay J1 is activated and self-locking, its normally open contact is closed to drive J3, and the motor is powered on to operate. When the pressure reaches the upper limit, the movable contact is connected to the upper limit contact, and the relay J2 is activated. Its normally closed contact is disconnected, cutting off the power supply to J1. Its normally open point is disconnected, J3 is released, and the motor stops running. Repeat this process to achieve automatic control.

wetted material

The material of the electric contact pressure gauge is 304 stainless steel or 316 stainless steel.