Pressure Gauge Readings Common Errors | Natrade

Pressure Gauge Readings Common Errors | Natrade

Understanding and Avoiding Faulty Pressure Gauge Readings in Malaysian Systems

Whether you’re managing steam boilers, water pumps, compressed air, or chemical systems, an accurate pressure gauge is vital to system safety and performance. But not all pressure readings are reliable—especially in environments where gauges are exposed to vibration, temperature swings, corrosion, or poor calibration.

In Malaysia’s humid and often demanding industrial conditions, pressure gauge errors can lead to false alarms, missed critical warnings, equipment strain, or even regulatory violations. That’s why understanding the common sources of pressure gauge reading errors is essential for plant operators, engineers, and maintenance teams.

This article explores the most frequent pressure gauge problems, what causes them, and how Natrade helps industries across Malaysia select and maintain accurate gauges.

Mechanical and Installation-Based Errors

1. Incorrect Gauge Selection for the Application

Not all pressure gauges are created equal. Using the wrong gauge for your system can result in:

  • Excessive wear on internal components

  • Inaccurate readings due to overrange pressure

  • Material failure in corrosive or high-temperature environments

For example, using a brass-case gauge in a chlorine line or selecting a 0–100 bar gauge for a 10-bar system compromises accuracy and lifespan. Natrade offers guidance on choosing range, material, and connection type suited to Malaysian process conditions.

2. Vibration-Induced Pointer Fluctuations

In high-vibration environments—such as near compressors, pumps, or heavy machinery—standard gauges can become unreliable. The pointer may:

  • Bounce excessively

  • Fail to return to zero

  • Cause internal mechanism wear

This leads to inconsistent or unreadable data. To avoid this, glycerin-filled or silicone-dampened pressure gauges should be used to absorb vibration and stabilise the pointer.

3. Poor Mounting and Orientation

Mounting a pressure gauge incorrectly—such as on an angle, with excessive pipe stress, or without proper support—can skew readings over time.

Common mistakes in Malaysia’s industrial settings include:

  • Mounting without snubbers in pulsating systems

  • Using gauges in positions that collect condensate

  • Overtightening gauge threads, which can distort the Bourdon tube

Correct orientation, use of siphons for steam, and flexible connectors in vibrating installations help improve long-term gauge accuracy.

Environmental and System-Induced Errors

1. Temperature Effects on Gauge Accuracy

In Malaysia’s tropical climate, ambient temperatures in outdoor installations can exceed 40°C. Combined with hot process media like steam or oil, this can cause:

  • Bourdon tube expansion or contraction

     

  • Case warping and condensation

     

  • Pointer drift due to internal pressure build-up

     

For high-temperature applications, use temperature-compensated or remote-sensing gauges. Install cooling elements such as siphon loops or capillaries where needed.

2. Pressure Pulsation and Water Hammer Effects

Frequent fluctuations in pressure—caused by reciprocating pumps, valve slamming, or fluid hammer—can cause:

  • Needle oscillation and reading instability

  • Mechanical wear on gear movement

  • Calibration drift

This is particularly common in boiler houses, irrigation pumping stations, and food processing plants. Pulsation dampeners or liquid-filled gauges reduce the effect of these shocks and prolong gauge life.

3. Clogging or Blockage at the Sensing Point

In slurry lines, dusty pneumatic lines, or viscous liquid systems, the inlet to the pressure gauge may become blocked, causing:

  • Zero or frozen readings

  • Delayed pointer response

  • False confidence in system status

To prevent this, use chemical seals, diaphragm seals, or isolators with flush ports. Natrade offers complete assemblies with flange or threaded connections for easy maintenance.

Integration with Smart and Automated Systems

A misbehaving pressure gauge can cause confusion—but how do you know if it’s the gauge or the system?

Field signs of faulty gauges include:

  • A pointer that sticks at a value even when the system is off

  • A zero offset when the process is depressurised

  • A gauge that fluctuates while the system runs steadily

  • Discrepancy between digital and analogue readings

Simple diagnostics include comparing readings with a reference test gauge, using a pressure calibrator pump, or switching the gauge between identical systems to see if the issue persists.

At Natrade, we also offer portable test kits and pressure calibration services for plant teams needing routine verification.

Frequently Asked Questions (FAQ)

1. How often should I calibrate my pressure gauges?

Calibration is recommended every 6–12 months, depending on the criticality of the application. More frequent checks are advised in regulated industries.

2. Can a liquid-filled gauge be used in high-temperature environments?

Yes, but only if the fill fluid is rated for the temperature. Use silicone for higher temperatures, and install siphons for steam or hot gases.

3. What is the typical lifespan of a pressure gauge?

In non-corrosive, steady-pressure systems, a gauge can last 5–10 years. In harsher conditions, lifespan may drop to 1–3 years without proper selection.

4. Why does my pressure gauge needle shake or bounce?

This is caused by pressure pulsation or vibration. Use a dampened movement gauge or install a snubber or pulsation damper.

5. Does Natrade supply pressure gauges with SIRIM or ISO certification?

Yes. We supply industrial gauges certified for ISO 9001, SIRIM, and CE standards, with documentation for audits and regulatory inspections.

Conclusion

Accurate pressure gauge readings are crucial for maintaining safety, efficiency, and compliance in Malaysia’s diverse industrial sectors. From water utilities and HVAC to chemical plants and manufacturing floors, avoiding common gauge errors can prevent equipment damage, downtime, and costly misjudgements.

At Natrade, we provide a comprehensive range of industrial pressure gauges—dry or liquid-filled, panel-mounted or remote-sensing—along with accessories like snubbers, seals, and siphons. Our expert team helps you select the right gauge, install it correctly, and maintain accuracy over time.

To request a product catalogue, schedule a consultation, or learn more about our pressure measurement solutions, we invite you to register your interest today through Natrade’s official platform.