Working Principle and Usage Tips of Tire Pressure Gauge

1. Choosing the Right Pressure Gauge
Choosing the right tire pressure gauge is the first step to ensuring accurate measurements. There are two common types available on the market: digital (electronic) and analog (mechanical). Each type offers different advantages, so consider the following factors when choosing:
Digital pressure gauges: These are generally more accurate, with clear and easy-to-understand readings, making them suitable for users who prioritize accuracy. They often feature LCD screens for intuitive readings. Digital pressure gauges often include built-in sensors for automatic calibration, and some also have additional features such as temperature measurement. However, they require batteries, which may affect the results during use.
Analog pressure gauges: They are simpler and generally require no batteries, making them suitable for users who are less reliant on batteries. They use mechanical internal mechanisms (such as springs, diaphragms, or pistons) to sense pressure and display the pressure value through a pointer. However, their accuracy is relatively low, and they may wear out over time.
When choosing a pressure gauge, consider your need for accuracy, your comfort level with batteries, and your budget.

2. Ensure the tires are cold when measuring pressure

Tire pressure fluctuates with temperature. Especially when the wheels are moving, tires heat up due to friction, which increases the air pressure. Measuring the air pressure when the tires are hot will usually result in an overestimate.
To measure the air pressure when the tires are hot, wait at least three hours after parking (preferably overnight) to allow the tires to cool to room temperature, or measure the pressure when the vehicle has not been driven. This provides the most accurate reading. Tire pressure increases significantly in hot environments, so ensuring that the tires are cold can help avoid errors.

3. Properly Installing the Pressure Gauge
Proper installation of the pressure gauge is crucial. Improper installation can cause the gauge to read incorrect pressure or damage the valve.

Installation Steps:
Analog Pressure Gauge: Firmly align the gauge connector with the valve stem and press down until you hear a popping sound, confirming the gauge is connected. Avoid pressing too hard on the valve stem, as this may damage it. Digital pressure gauges: Ensure the connector and valve are securely connected. Excessive force is generally not required; gentle contact is sufficient. Ensure the gauge connector is fully seated on the valve stem; otherwise, inaccurate readings may occur.

If the gauge is not securely seated, the gauge may leak, resulting in inaccurate readings or even damage to the valve stem.

4. Avoid over-pressing the gauge
When attaching the gauge to the valve stem, maintain steady pressure. Excessive pressure can cause the following problems:

Damage to the gauge: The pressure sensor of some gauges may lose sensitivity due to excessive pressure.

Damage to the valve stem: Excessive pressure can cause the valve stem to lose its seal and even damage the valve components.

Inaccurate readings: Excessive pressure can cause air to leak, resulting in inaccurate readings.

The correct procedure is to gently press the gauge into the valve stem until you hear air leaking and the reading stabilizes. If the gauge is digital, wait until the value is fully displayed; if it is an analog gauge, wait until the needle stabilizes.

5. Keep the barometer clean
After prolonged use, the surface and connectors of a barometer tend to accumulate dust, especially when used outdoors. Dirt, grease, and debris can affect the barometer's accuracy and even damage the internal mechanism.
Cleaning steps:
Gently wipe the surface of the barometer with a clean cloth. Avoid using chemical-based cleaners, as these may corrode the barometer's casing.
Regularly clean the barometer's connectors. Use compressed air to blow away any debris from the connectors.
For digital barometers, avoid allowing liquids to enter the gauge.
When cleaning, be especially careful not to get the barometer's electronics wet to avoid damage.

6. Calibrate the barometer regularly
Over time, a barometer may lose accuracy. Analog barometers, in particular, may experience deviations due to wear and tear of the internal mechanism.
Calibration method:
Calibration frequency: It is recommended to calibrate the barometer every six months to one year, especially if you notice a difference in the barometer's readings. Digital barometers can usually be recalibrated by simply resetting them. How to Calibrate: You can have your tire pressure gauge calibrated by a professional tire repair shop or tire repair shop, or compare your tire pressure gauge to a known accurate gauge to identify discrepancies and make adjustments.

Regularly calibrating your tire pressure gauge ensures long-term accuracy.

7. Know the Correct Tire Pressure

Every vehicle has a recommended tire pressure, which can usually be found in the owner's manual or on a label on the driver's door jamb. Tire pressure is usually stated in psi (pounds per square inch), though some vehicles also list it in kPa (kilopascals).

How to Find the Recommended Pressure:

The owner's manual usually lists the recommended front and rear tire pressures.

Door Label: Most vehicles have a label near the driver's door jamb that lists the recommended front and rear tire pressures.

The correct tire pressure improves driving comfort, reduces fuel consumption, extends tire life, and reduces the risk of blowouts.

8. Avoid excessive or insufficient tire pressure
Low pressure: Low tire pressure increases the tire's contact area with the road, increasing friction and causing rapid tire wear, which can affect fuel consumption and vehicle handling. Low pressure can also cause tire overheating, increasing the risk of a blowout.
High pressure: Excessive pressure reduces the tire's contact area with the road, affecting grip and comfort. High pressure can also increase the risk of center wear and shorten tire life.
Regularly check and ensure the tire pressure is within the manufacturer's recommended range. If you're unsure how to adjust, you can find a pressure gauge at a gas station and adjust the tire pressure by adding or subtracting air.

9. Regularly check the pressure of all tires

Many car owners only check the pressure of their driver's tires, neglecting the spare tire or non-drive wheels. Maintaining consistent pressure in all tires ensures balanced vehicle performance.
Recommendation:
Check the pressure of all tires monthly.
When frequently traveling long distances or carrying heavy loads, be especially careful to check tire pressure to avoid overloading. Checking the spare tire's pressure is equally important, as it may be needed in an emergency.

10. Replace a Damaged Pressure Gauge
If you notice any malfunctions with your pressure gauge, such as abnormal readings, unstable display, inability to return to zero, or mechanical damage, replace it promptly.
Common Problems:
Stuck Pointer: The needle on an analog pressure gauge may become stuck due to an internal mechanism problem, preventing it from accurately displaying the pressure.
Display Problem: The screen on a digital pressure gauge may not display clear numbers due to an electronic malfunction.
Loss of Sensitivity: If a pressure gauge loses sensitivity after prolonged use, it may cause measurement errors.
Replace a damaged pressure gauge promptly to ensure accurate and reliable readings every time you check the pressure.