How to Read a Car Tire Pressure Gauge?
2 Answers
To correctly use a tire pressure gauge, the center line of the pressure measurement port should form an angle of 90°-180° with the axis of the gauge body. The scale is a rectangular prism, with a range of 0.07Wpa-0.4Wpa. Before reading, gently tap the instrument's casing or glass surface with your finger to eliminate friction in the transmission mechanism. When observing, ensure the pointer overlaps with the mirrored pointer. The value indicated by the pointer at this moment is the pressure reading, accurate to one decimal place. Also, read the temperature value on the pressure gauge, precise to one decimal place. Align and press the measurement end slot of the pressure gauge firmly against the tire's valve stem. At this point, the tire pressure gauge's pointer will deflect, and the indicated value is the inflation pressure of the tire. Alternatively, the gauge's indicator rod may be pushed out by the air pressure, displaying the inflation pressure of the tire. The higher the internal tire pressure, the more the pointer will deflect.
I remember when I first started driving, I was completely clueless about tire pressure gauges, but now that I'm familiar with them, it seems pretty simple. Just screw the gauge's air nozzle directly onto the tire’s valve stem, making sure it’s tight to avoid leaks. Most gauges have a needle that will jump to a certain number—that’s your tire pressure reading, usually in PSI or BAR. I mostly use PSI, and the recommended range (like 30 to 35 PSI) can usually be found on the label by the car door or in the owner’s manual. If the needle is unstable, there might be a leak or the gauge could be faulty. I check mine every two weeks—it saves fuel and prevents blowouts, making driving much safer. Sometimes, seasonal temperature changes can affect tire pressure, so it’s always good to check.
