How To Choose a Suitable Pneumatic Pressure Gauge?

In pneumatic systems, pneumatic pressure gauges are a key measuring tool that monitors and displays the air pressure in the system to ensure that the equipment operates within a safe and stable pressure range. Choosing a suitable pneumatic pressure gauge can not only improve the reliability of the system, but also prevent equipment failures caused by overpressure or underpressure. So, how to choose a suitable pneumatic pressure gauge? This article will explain from five aspects: pressure range, accuracy, dial size, connection method and use environment.

1. Determine the pressure range

When selecting a pneumatic pressure gauge, the pressure range (upper limit of measurement) is the primary consideration. Generally speaking, the range of the pressure gauge should be 1.5-2 times the system working pressure to avoid the influence of pressure fluctuations on the measurement accuracy. For example, if the normal working pressure of the pneumatic system is 6 bar, it is recommended to choose a pressure gauge with a range of 0-10 bar.

2. Choose the appropriate accuracy level

The accuracy of a pressure gauge is usually expressed in percentages, such as 1.6%, 2.5%, etc., indicating its full-scale error. For example, for a pressure gauge with an accuracy of 1.6%, if the range is 10 bar, the maximum error is ±0.16 bar.

Ordinary pneumatic equipment: 2.5% accuracy can meet the needs.

Precision pneumatic control system: It is recommended to choose a pressure gauge with a higher accuracy of 1.6% or 1.0%.

3. Choose the right dial size

The dial size of pneumatic pressure gauges is usually 40mm, 50mm, 63mm, 100mm, etc. The larger the size, the clearer the reading. Please refer to the following suggestions when choosing:

Limited installation space or portable equipment: You can choose a small dial of 40mm or 50mm.

Industrial equipment or long-distance observation: It is recommended to use a large dial of 63mm or 100mm for easy reading.

4. Choose the right connection method

The interface of the pneumatic pressure gauge usually has a threaded connection (common specifications are G1/8, G1/4, NPT1/8, NPT1/4). When choosing, make sure that the interface specifications match the equipment. In addition, there are two installation positions:

Radial installation (Radial): suitable for horizontally installed equipment.

Axial installation (Back Mount): suitable for vertical installation scenarios.

5. Consider the use environment

Different working environments have different requirements for the material and protection performance of the pressure gauge:

Ordinary factory environment: You can choose a standard stainless steel or copper alloy pressure gauge.

High temperature, high humidity or corrosive environment: It is recommended to choose a full stainless steel material, or a pressure gauge with an anti-corrosion coating to improve durability.

Vibration environment: It is recommended to use a pressure gauge with oil filling (glycerin or silicone oil) to reduce pointer jitter and improve reading stability.

Hazardous environment (such as flammable gas area): Explosion-proof pressure gauge should be selected.

Summary

The key to choosing a suitable pneumatic pressure gauge is to match the pressure range, accuracy, dial size, connection method and use environment. The right pressure gauge can not only improve system stability, but also effectively reduce equipment failures. If you are selecting a pressure gauge for a pneumatic system, you may wish to follow the above guidelines to ensure that you choose a product that meets your needs and ensure the safe and efficient operation of the equipment!