Leak Testing Solution with High-Resolution Pressure Measurement: GP-6210 in Practice

Leak testing plays a critical role in modern industrial quality control. Whether in automotive components, hydraulic systems, or sealed assemblies, even the smallest leakage can lead to performance degradation, safety risks, or product failure.

A key challenge in leak detection is not generating pressure—but accurately detecting extremely small pressure changes over time. This is where high-resolution pressure measurement becomes essential.

The GP-6210 High Accuracy Pressure Transmitter provides an effective and reliable solution for such applications.

The following video demonstrates the sensitivity of the GP-6210 in a real test scenario.

The Challenge of Detecting Micro-Leakage

In a typical pressure decay leak test:

1. A test object is pressurized to a defined level
2. The pressure source is isolated
3. The pressure drop over time is monitored

For high-quality products, leakage rates are often extremely small. As a result:

• Pressure decay may be only a few Pascals
• Detection requires both high resolution and excellent stability
• Environmental factors (temperature, noise) can affect results

Traditional transmitters often struggle to distinguish real leakage from signal noise under these conditions.

Solution Concept: High-Resolution Pressure Monitoring

The GP-6210 addresses these challenges through a combination of:

• Ultra-high resolution (up to 3.3 ppm of full scale)
• High accuracy (up to ±0.03% FS)
• Fast response and stable signal processing

In practical testing scenarios, the transmitter is capable of reliably detecting pressure drops as small as 1–2 Pa, even when operating at higher pressure levels such as 700 kPa.

This capability significantly improves the sensitivity and repeatability of leak detection systems.

Typical System Configuration

A standard leak testing setup using the GP-6210 may include:

• Pressure source (pneumatic or hydraulic)
• Test chamber or device under test (DUT)
• Isolation valve
• GP-6210 pressure transmitter
• Data acquisition or control system (PLC / PC)

Testing Process:

• Pressurize the DUT to target pressure
• Isolate the pressure source
• Continuously monitor pressure using GP-6210
• Analyze pressure decay over time

Thanks to its high sampling rate and fast response time, the GP-6210 provides real-time pressure data suitable for automated evaluation.

Key Advantages in Leak Testing Applications

1. Detection of Extremely Small Pressure Changes

With a resolution of up to 3.3 ppm, the GP-6210 can capture minimal pressure variations that are critical in high-precision leak testing.

2. High Measurement Stability

Digital temperature compensation and advanced signal processing reduce drift and noise, ensuring consistent and repeatable results.

3. Flexible Output Options

• RS485 (Modbus RTU) for high-resolution digital data
• 4–20 mA output for standard industrial integration

This allows easy connection to both laboratory systems and industrial automation platforms.

4. Fast Response for Dynamic Monitoring

• Response time: <10 ms
• Sampling rate: >30 Hz

These characteristics enable accurate tracking of pressure changes in real time.

5. Robust Industrial Design

• Stainless steel housing
• Media-isolated sensor
• IP65 / IP68 protection

Suitable for demanding industrial environments and long-term operation.

Application Scenarios

This solution is particularly effective in:

• Automotive component leak testing
• Valve and fitting sealing verification
• Hydraulic and pneumatic system testing
• Laboratory precision leak analysis
• Production line quality control

In all these applications, the ability to detect micro-leakage quickly and reliably leads to improved product quality and reduced rejection rates.

Practical Insight: From Measurement to Decision

Leak testing is not only about measuring pressure—it is about making reliable decisions based on small signal changes.

By providing stable, high-resolution data, the GP-6210 helps engineers:

• Reduce false positives and false negatives
• Improve test repeatability
• Shorten testing cycles
• Increase confidence in quality control processes

Conclusion

As leak testing requirements become more stringent, traditional measurement approaches may no longer be sufficient. High-resolution pressure monitoring offers a more reliable path forward.

The GP-6210 High Accuracy Pressure Transmitter provides a practical and efficient solution, combining precision, stability, and industrial robustness in a single device.

For applications where even a few Pascals matter, it delivers the performance needed to ensure accurate and dependable leak detection.

For more information about leak testing solutions or integration support, please contact us.

Additionally, if you are interested in pressure transmitters with higher accuracy, you may want to consider our series of silicon resonant pressure transmitters:

GP-1100 Atmosphere Pressure Sensor

PID-4100 Dynamic-Static Pressure Sensor