Choosing the right industrial pressure gauge is essential for reliable readings, long service life, and safe operation. A gauge suitable for clean water may not work well with corrosive chemicals, viscous fluids, high-temperature media, or strong mechanical vibration.

Before selecting a model, consider the process medium, operating temperature, pressure range, required accuracy, wetted materials, connection, and installation environment.

1. Select the Pressure Gauge Based on the Process Medium

The process medium is one of the most important factors in pressure gauge selection. Corrosion, viscosity, suspended particles, and crystallization can damage the sensing element or block the pressure connection.

For corrosive media, do not select a gauge based only on the case material. The process connection, sensing element, diaphragm, and seals must also be compatible with the medium.

For viscous or clogging media, a diaphragm seal can provide a barrier between the process and the gauge mechanism. Confirm that the diaphragm design is suitable for the medium and pressure range.

Recommended product: JIECHUANG Diaphragm Pressure Gauge

2. Consider Process Temperature and Ambient Conditions

Temperature can affect the sensing element, case filling, seals, and measurement stability. Check both the process temperature and the ambient temperature around the gauge.

• High-temperature media: Consider a suitable high-temperature design, cooling or heat-dissipation structure, or a compatible remote diaphragm seal arrangement.

• High vibration or pressure pulsation: A liquid-filled pressure gauge can help stabilize pointer movement and reduce vibration-related wear.

• Outdoor or humid environments: Check the case material and ingress protection rating.

• Corrosive surroundings: Consider a suitable corrosion-resistant case and protective construction.

A liquid-filled gauge is not automatically suitable for every high-temperature application. The fill liquid, temperature limits, seals, and gauge design must match the actual operating conditions.

Recommended product: JIECHUANG High-Temperature Glycerin-Filled Shock-Resistant Pressure Gauge

3. Choose the Correct Pressure Range

The pressure range should cover normal operating pressure while allowing for expected fluctuations and pressure surges.

As a general selection guideline, the normal operating pressure should fall within a suitable portion of the dial scale. Ashcroft references an operating range of approximately 25%–75% of full scale for many applications. For significant pulsation, a more conservative range may be necessary. Always follow the applicable standard and the manufacturer's instructions.

Before ordering, confirm:

• Normal operating pressure.

• Minimum and maximum pressure.

• Pressure spikes and pulsation.

• Gauge pressure, vacuum, or compound pressure requirements.

• Overpressure and cyclic loading conditions.

Avoid selecting a gauge with a range that is too low, as this may expose the sensing element to excessive stress. An unnecessarily high range can also make readings difficult to interpret.

4. Select the Required Accuracy and Dial Size

Accuracy and dial size should match the measurement task and the viewing distance.

Accuracy class: General industrial monitoring may use a standard accuracy class, while testing, calibration, or critical processes may require higher accuracy. Choose according to the process tolerance and applicable requirements.

Dial size: Common sizes include 60 mm, 100 mm, and 150 mm, depending on the product series.

• Choose a larger dial when the gauge must be read from a distance.

• Consider the scale spacing and readability when higher accuracy is required.

• Confirm that the dial range and units match the operating requirements.

A larger dial does not automatically guarantee higher accuracy. Check the specified accuracy class for the selected model.

5. Choose Wetted Materials and Diaphragm Seals

The wetted parts are the components that contact the process medium. Material selection should consider chemical composition, concentration, temperature, and pressure.

For diaphragm pressure gauges, confirm the diaphragm material, flange or process connection, and sealing material. Options may include stainless steel, PTFE, or specialized alloys, depending on the product design.

Important: No single material is suitable for every chemical. Verify the exact medium and operating conditions before confirming the gauge configuration.

Recommended product: JIECHUANG PTFE-Lined Diaphragm Compound Vacuum Pressure Gauge

6. Confirm the Connection and Installation Direction

The process connection must match the equipment connection and available installation space.

Check the following details before ordering:

• Thread standard: For example, M20×1.5, G1/2, or 1/2 NPT. These are different standards and should not be assumed interchangeable.

• Connection position: Bottom connection or back connection.

• Mounting arrangement: Direct mounting, panel mounting, or another supported arrangement.

• Flange or sanitary connection: Confirm the applicable size, standard, and sealing interface.

• Dial visibility: Ensure the gauge can be read and maintained safely after installation.

Incorrect thread selection or unsuitable mounting can cause installation problems, leakage, or poor readability.

7. Check Whether You Need Electrical Contacts or Explosion Protection

A standard mechanical pressure gauge provides local indication. Some models offer additional functions.

Electric contact pressure gauge: Provides local pressure indication and electrical switching when the pointer reaches a preset threshold. It may be used for alarms, interlocks, or control functions when correctly configured.

Explosion-protected gauge: If the installation is in a hazardous area, confirm the required certification, protection method, and installation conditions. Do not assume that an ordinary pressure gauge is suitable for a hazardous area.

Recommended product: JIECHUANG Glycerin-Filled Shock-Resistant Electric Contact Pressure Gauge

Pressure Gauge Selection Checklist

Prepare the following information when requesting a quotation:

• Process medium and whether it is corrosive, viscous, crystallizing, or particle-containing.

• Process and ambient temperatures.

• Pressure range and normal operating pressure.

• Required accuracy class.

• Dial size.

• Case material and wetted-part materials.

• Diaphragm and sealing materials, if applicable.

• Thread, flange, or sanitary connection specification.

• Connection position and mounting type.

• Liquid filling, heat protection, or other environmental requirements.

• Electric contact or hazardous-area requirements.

• Quantity and any special requirements.

Providing these details helps the supplier recommend a suitable configuration and reduces the risk of selecting the wrong gauge.

Explore JIECHUANG Pressure Gauges

JIECHUANG offers pressure gauge options for general industrial measurement, vibration-prone systems, low-pressure gas applications, corrosive media, and specialized process connections.

Browse the JIECHUANG Pressure Gauge product range to compare available designs and configurations.

For assistance with selection, share your process medium, operating temperature, pressure range, connection, and installation conditions with our team.

JIECHUANG — Reliable Instruments, Trusted Partner.