Electrical Contact Pressure Gauge, also known as Pressure Gauge with Switche, or Switch Pressure Gauge , is a pressure measuring instrument widely used in industrial automation control, with both pressure display and electrical signal output functions. It can monitor system pressure in real time and trigger a switch signal when the pressure reaches the set threshold to achieve automatic alarm or control. This article will introduce the working principle, application scenarios, selection points and maintenance recommendations of the electrical contact pressure gauge in detail to help you better select and use the device.
electrical contact pressure gauge
What is the working principle of the electrical contact pressure gauge?
The core structure of the electrical contact pressure gauge includes:
Spring tube pressure sensing mechanism: sensing pressure changes through elastic deformation.
Pointer and setting pointer (contact): The main pointer indicates the current pressure, and the setting pointer is used to adjust the upper and lower limit trigger values.
Electrical contact switch: When the pressure reaches the set value, the pointer contacts the contact, connects or disconnects the circuit, and outputs a switch signal.
This design not only enables it to intuitively display pressure, but also to link PLC, relays or alarm systems to achieve automatic control.
What are the main application scenarios of electric contact pressure gauges?
Electric contact pressure gauges are widely used in the following industries:
Industrial automation: air compressors, hydraulic systems, boiler pressure monitoring.
Water treatment: water pump control, pipeline pressure protection.
Petrochemical: storage tank pressure monitoring, explosion-proof environment safety control.
Fire protection system: gas fire extinguishing device, fire pump pressure management.
How to choose a suitable electric contact pressure gauge?
The following key factors should be considered when purchasing:
Range: Ensure that the working pressure is covered, generally choose 1.5~2 times the range.
Accuracy level: Common 1.6 and 2.5 levels, high-precision requirements can choose 0.5 levels.
Contact type: single contact (upper/lower limit alarm) or double contact (upper and lower limit control).
Explosion-proof requirements: Explosion-proof electric contact pressure gauges (Ex d/IIC) are required for flammable and explosive environments.
Shock resistance: Shock-resistant type should be selected for occasions with large vibration (such as compressors).
Installation and maintenance recommendations for electric contact pressure gauges:
Correct installation: Avoid strong vibration and high temperature environment, and install vertically to ensure accurate readings.
Regular calibration: Check every 6 to 12 months to prevent contact oxidation or mechanical wear.
Contact protection: It is recommended to connect an external intermediate relay when the current load is high to extend the service life.
Frequently Asked Questions (FAQ) about electric contact pressure gauges
Q1: What is the difference between electric contact pressure gauges and ordinary pressure gauges?
A1: Ordinary pressure gauges only display pressure, while electric contact pressure gauges can output switch signals for automatic control.
Q2: What should I do if the contacts are easily burned out?
A2: You can choose a magnetic-assisted electric contact pressure gauge (magnetic auxiliary contact) to reduce arc damage, or connect an external relay to reduce the load current.
Q3: How to adjust the upper and lower limit setting values?
A3: Adjust through the setting knob on the dial, and some models support external adjustment mechanisms.
Electric contact pressure gauge is an indispensable instrument in industrial automation, suitable for pressure monitoring, alarm and automatic control scenarios. Our company specializes in providing various types of industrial pressure gauges. If you need to know more detailed product specifications or technical parameters, please consult us!
Hangzhou Yucheng Science & Technology Co., Ltd
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