Pressure transmitters play a critical role in industrial applications, ensuring accurate pressure readings for efficient system operation. Over time, factors such as environmental conditions, mechanical wear, and sensor drift can impact their accuracy. Regular maintenance, calibration, and monitoring help maintain performance and extend the lifespan of pressure transmitters. This guide outlines essential practices to keep these instruments functioning reliably.

1. Regular Calibration

Calibration ensures that a pressure transmitter continues to provide precise readings. Industry standards recommend periodic calibration based on operating conditions and usage.

How Often Should You Calibrate?

  • High-precision applications: Every 3–6 months
  • General industrial use: Every 6–12 months
  • Low-risk applications: Annually

Calibration Methods

  • Zero and span calibration – Adjusting the transmitter’s output at known pressure points.
  • Comparison with a reference standard – Using a certified pressure calibrator for validation.
  • On-site vs. laboratory calibration – On-site calibration minimises downtime, while lab calibration provides more controlled conditions.

2. Environmental Considerations

Pressure transmitters can be affected by temperature fluctuations, humidity, and exposure to harsh chemicals. Protecting them from these factors extends their accuracy and operational life.

Best Practices

  • Install transmitters in temperature-controlled environments where possible.
  • Use protective enclosures in areas with high humidity or corrosive chemicals.
  • Regularly inspect for moisture ingress that could impact readings.

3. Mechanical Wear and Sensor Drift

Over time, sensor elements may degrade, leading to accuracy drift. Regular inspections help detect early signs of wear.

Preventative Measures

  • Check for physical damage, corrosion, or loose connections.
  • Monitor output signals for unexpected fluctuations.
  • Replace worn-out sensors before they affect system performance.

4. Electrical and Signal Integrity

A pressure transmitter’s performance is also influenced by its electrical components and signal transmission. Ensuring stable connections and minimising electrical noise can help maintain accuracy.

Key Actions

  • Verify cable integrity and secure all wiring.
  • Use shielded cables to reduce interference in electrically noisy environments.
  • Inspect power supply stability to prevent signal distortions.

5. Routine Performance Monitoring

Tracking performance trends over time can help identify potential issues before they lead to critical failures.

Monitoring Strategies

  • Implement automated data logging to track readings over time.
  • Compare the output with the expected pressure ranges.
  • Conduct periodic benchmark tests using a secondary measurement device.

6. Selecting High-Quality Pressure Transmitters

Choosing a reliable pressure transmitter reduces maintenance frequency and improves long-term accuracy.

Factors to Consider

  • Material selection – Corrosion-resistant materials for demanding environments.
  • Sealing and protection – IP-rated enclosures for harsh conditions.
  • Accuracy specifications – Choosing a transmitter with minimal long-term drift.

Maintaining Long-Term Accuracy

Ensuring long-term accuracy in pressure transmitters requires a combination of calibration, environmental protection, mechanical inspections, and performance monitoring. By following these best practices, businesses can avoid inaccurate readings, reduce downtime, and maintain system efficiency.

For expert guidance on selecting and maintaining pressure transmitters, contact Digicon Solutions. Our team can provide tailored support for industrial applications.