What is the accuracy of your analogue tire gauges?

Our mechanical tire pressure gauges & inflators are factory calibrated to meet or exceed ANSI B40.1 International Accuracy Standards. 

 

Here are the specifications for gauge accurate to meet ANSI B40.1 Standards:

 

First third of scale = ±3% full scale range

Middle third of scale = ±2% full scale range

Last third of scale = ±3% full scale range

 

For example, on a gauge dial that reads 0-100 PSI:

 

The first third of the scale is 0-32 PSI. In this range the acceptable accuracy is 3% of 100 PSI (which is the full scale range). So between 0-33 PSI, the acceptable margin for error is plus or minus 3 PSI (which is 3% of 100).

 

In the middle third of scale 33-66 PSI, the acceptable margin for error is 2% of 100 - which is plus or minus 2 PSI.

 

On the last third of scale 67-100 PSI - the acceptable margin for error is 3% of 100 - which is plus or minus 3 PSI.

 

That said, we hold our products to very high accuracy standards, and we actually have an acceptable margin of error of only plus or minus 1.5% when our gauges are produced at our manufacturing facility. This means that our gauges will quite often be very precise and exceed the ANSI B40.1 standards.