During the start-stop, loading, and unloading of air compressors, transient airflow impacts and pressure pulsations occur inside the gas storage tank. Many companies encounter issues such as frequent sensor value fluctuations and measurement drift caused by long-term impacts. Many procurement personnel wonder: Can the digital pressure sensors used for monitoring the gas storage tank directly withstand the impact of compressed airflow? Combining the Longlv PTL538 ultra-high pressure digital pressure sensor, we will clarify the operating condition adaptation boundaries, protection schemes, and practical operation points.

First, let's clarify the core concept: sensors possess a certain ability to resist conventional pressure fluctuations, but they cannot withstand continuous strong direct airflow or instantaneous high-pressure impacts.

The airflow velocity at the inlet of the gas storage tank is fast, and the gas directly scours the sensing diaphragm. Coupled with the pressure spikes brought by the periodic loading of the air compressor, long-term direct blowing can cause two major problems: the display screen numbers flicker back and forth, and the control system gives false alarms; the continuous impact causes irreversible stress on the sensing diaphragm, which over time leads to zero drift and shortens the service life of the instrument.

1. The inherent advantages of PTL538 digital display pressure sensor in dealing with the working conditions of gas storage tanks

For the compressed air scenario in air compression stations, this digital pressure sensor has undergone corresponding optimization design:

Built-in multi-level digital filtering function

The filtering parameters can be adjusted on-site to smooth out the periodic pressure pulsations of the air compressor, mitigate reading jumps caused by small airflow fluctuations, achieve stable readings on the local display screen, and simultaneously output stable signals to the control system, reducing false triggering of high and low pressure alarms.

Integrated and stable internal structure

The internal components have undergone reinforcement treatment, providing strong resistance to mechanical vibration. They can adapt to the continuous vibration environment of the air compressor room and withstand minor pressure fluctuations under normal operating conditions of the gas storage tank.

Support local display + signal output

A single device combines on-site inspection readings with remote pressure monitoring, and supports setting pressure upper and lower limits, enabling early warnings for overpressure and underpressure of gas storage tanks, thus meeting the safety monitoring needs of air compression stations.

However, it is important to note that the built-in filtering can only handle pressure pulsations and cannot withstand the hard impact brought by high-speed airflow directly scouring the diaphragm. If the pressure tapping location is not reasonable and the high-speed airflow is directly facing the sensing surface, it will still affect the long-term stable operation of the instrument.

II. Protective measures must be taken for the installation of air compressor gas storage tanks (key pitfalls to avoid)

Select the right pressure point to prevent direct airflow

Do not install sensors on the front of the air intake of the gas storage tank or in areas with direct airflow. Priority should be given to selecting the middle position on the side of the tank, avoiding the turbulent inlet area, ensuring smooth gas flow and significantly reducing airflow impact.

Reasonably install buffering and damping accessories

For high-pressure air compressor systems with severe operating conditions and frequent start stop, it is recommended to add damping screws or buffer coils at the front end of the sensor to buffer the instantaneous pressure peak and protect the sensing diaphragm. Small and medium-sized air compressors that run smoothly can be selected according to the on-site situation.

Standardize range selection and reserve pressure margin

When selecting, avoid the range being close to the working pressure, reserve sufficient overload range, resist instantaneous impact pressure, and prevent sudden pressure spikes from damaging sensing elements.

Prepare the gas source properly

Compression contains condensed water, oil stains, and water vapor that impacts the diaphragm with the airflow, which not only exacerbates the impact but also easily causes internal components to become damp. It is recommended to install a small air source filter at the front end.

3、 Summary of Scene Selection

✅  Small and medium-sized air compressors operate smoothly with moderate pressure fluctuations: After selecting the appropriate pressure point, the Longlv PTL538 ultra-high pressure digital pressure sensor can be directly used for monitoring the pressure of the gas storage tank. By adjusting the internal filtering parameters, stable readings can be obtained;

⚠️  Large high-pressure air compressor, frequent loading and unloading, and strong impact of intake airflow: In addition to optimizing the installation position, it is necessary to equip with buffering and damping devices for dual protection to ensure the long-term accuracy of the instrument;

❌  It is strictly prohibited to install directly in positions with turbulent air intake or high-speed airflow. Relying solely on the sensor's own structure to resist continuous airflow impact still poses a risk of drift.

Compared to separately installing ordinary pressure transmitters and local pressure gauges, the PTL538 integrated digital pressure sensor integrates monitoring, local display, and pressure alarm functions, simplifies pipeline installation, and is a commonly used solution for intelligent transformation of air storage tanks in air compression stations. As long as the correct installation method is used, various faults caused by airflow impact can be effectively avoided.