How to repair and maintain the pressure gauge? 

Pressure gauge is an instrument used to measure the pressure in pipes, containers and other equipment. Its service life is generally long under normal working environment, but long-term use or improper maintenance may lead to the damage or performance degradation of pressure gauge. Therefore, regular maintenance is very important. The following will introduce some common maintenance methods of pressure gauges.

First, the appearance inspection

1. Check the appearance of the pressure gauge for obvious damage or deformation.

2. Check whether the scale on the dial is clearly visible and whether the pointer indicates accurately.

3. Check whether the case and cover glass are intact and whether the bracelet is fastened.

Second, the pressure gauge calibration

1. First, the calibrated standard pressure gauge and the detected pressure gauge are used for reading verification at the same time, and the reading difference between them under different pressures is recorded.

2. If the reading difference exceeds the allowable error range, further adjustment and verification are needed.

Third， Inspection of valves and seals

1. Check whether the valve at the joint of pressure gauge and pipeline is normal, and whether there is leakage or looseness.

2. Check whether the seal of the pressure gauge is in good condition, and replace it in time if it is worn or aged.

3. If it is found that the seal is poor or the valve is abnormal, it should be properly repaired or replaced.

Fourth, cleaning and dust removal

1. Regularly clean the pressure gauge shell, which can be wiped with clean cloth or cleaned with detergent.

2. When cleaning the pressure gauge, be careful not to wet the inside, so as not to affect the normal use.

V. Anti-corrosion treatment

1. Pressure gauges are often used for pipeline installation of corrosive media, so it is necessary to regularly check whether the anticorrosion layer of pressure gauges is damaged or falls off.

2. If necessary, anti-corrosion treatment should be carried out in time to prolong the service life of the pressure gauge.

Six, temperature compensation

1. The accuracy of the pressure gauge will be affected by temperature, so temperature compensation is needed when the ambient temperature is high or changes greatly.

2. There are many methods of temperature compensation, such as replacing sensors adapted to high temperature or low temperature environment.

Seven, PVC special protection

1. For pressure gauges working in special environment, such as containers of corrosive gas or liquid, PVC plastic jacket can be used for special protection.

2. PVC plastic has good acid and alkali resistance and corrosion resistance, which can effectively protect the pressure gauge.

What is the difference between a pressure gauge and a pressure sensor? Do you know that?/You know what?

Pressure gauge and pressure sensor are two different methods to measure pressure. Although they are all tools for measuring pressure, they have different working principles and application scenarios. In this paper, we will discuss the difference between pressure gauge and pressure sensor in detail.

1. Working principle

Pressure gauge is a mechanical instrument, which measures the pressure by measuring the mechanical deformation of the external force of the object. The pressure gauge measures by including elastic elements (such as springs, diaphragms or bellows), and its working principle is based on Hooke's law: an object is elastically deformed under the action of external force. When the external force acts on the elastic element, the element will deform and cause the pointer of the pressure indicator to deflect, so that the pressure of the measured object can be displayed.

The pressure sensor is measured in the form of variable resistance or capacitance. When the measured object is under pressure, the sensitive parts (such as resistors or capacitors) in the sensor will change slightly, which will lead to the change of the electrical output signal. The sensor determines the pressure of the measured object by measuring the change of the electrical output signal.

2. Application scenarios

Because the pressure gauge is mechanical, it is more suitable for applications that need to obtain pressure information quickly and simply. For example, in factories, workshops, laboratories, construction sites and other places, such as the detection, adjustment, calibration, quality control and so on. Pressure gauges usually output information in mechanical form and need to be calibrated and adjusted frequently to ensure accuracy.

In contrast, pressure sensors are more commonly used in complex, high-precision and low-noise application scenarios, such as medical treatment, automatic control in production process, measurement in robots, drones and other fields. Sensors can usually provide digital output and self-calibration functions to obtain higher accuracy and reliability.

3. Accuracy and measuring range

Pressure sensors usually provide higher measurement accuracy and wider measurement range. The sensor has high resolution (hundreds to thousands) and high precision (usually a few percent of the total). This makes them very useful when it is necessary to measure pressure with high accuracy.

In contrast, the pressure gauge has a large measuring range (nearly 10 times that of the sensor) and a low measuring accuracy (usually only a few percent of the order of magnitude). However, because their working principle is not too complicated, they are usually more robust and economical than sensors.

4. Installation and use

Pressure gauges are usually easier to install and use than pressure sensors. Because they are mechanical devices, they do not need external power supply or interface, and can be directly plugged into the interface of measuring equipment or the measured object. On the contrary, pressure sensors usually need special interfaces and signal processing circuits to convert electrical signals into readable measurement results.

5. Cost

Ultimately, cost is one of the key differences between evaluating pressure gauges and pressure sensors. Pressure sensors have high technical and manufacturing costs, which are usually higher than pressure gauges, and usually require special signal processors. Therefore, for most application scenarios, the pressure gauge is more practical, economical and easy to use.

Link-B2B is a professional supplier listing service platform which will provide high quality and trustworthy supplier list to international buyers. If you are looking for 

pressure gauges suppliers, feel free to visit Link-B2B.com and send a request.