I have an Intercomp digital gauge that I like. I send it to Intercomp to get check calibration.
Bought the Jaco Digital that seemed to perform best. Haven’t compared it with the others I have, yet.Project Farm tested 23 different tire pressure gauges (2 samples each, for a total of 46 gauges).
The summary chart is at time point 18:45.
I checked the small round US Gauge gauge on a calibration test bench. It was 1 psi low at 35 psi, despite being beat to crap. I chose to not calibrate it, out of fear of making it worse. It's OLD, and while small, it weights more than all my newer gauges, because it's built with really metal. My digital Ashcroft pressure gauge is basically dead on.How can you know your gauge is good? Without a known reference, you really cant. Best would be as other have said, compare it to others. But even then, what if those are also bad.....a bad batch in manufacturing.
Great question.
I recently had an issue with a fuel pressure gauge, which was expensive.
This video is not very accurate. Bourdon tube gauges are rated at a percentage of full scale. Many are a class B (2% of FS from 25% to 75% of FS and 3% of FS for the first and last 25% of FS) or class A (1% of FS from 25% to 75% of FS and 2% of FS for the first and last 25% of FS). Digital gauges are often have a tolerance of a percent of reading or a specific reading ie. +/- 1% of reading or +/- 1 psi (this would be appropriate for a 100 PSI digital pressure gauge. The reason for the numerical tolerance is that to have +/- 1% of reading at 5 psi on that gauge the gauge would have to read out to 5.00 psi, and have that incredible accuracy at the low end of its range. So, if your digital gauge doesn't list it's tolerance as a percentage of FS or a percentage of the reading +/- a specific value or number of digital counts, the manufacturer is not being forthright.Bought the Jaco Digital that seemed to perform best. Haven’t compared it with the others I have, yet.
https://jacosuperiorproducts.com/co...-pressure-gauge-professional-accuracy-100-psi
Proof by performance.This video is not very accurate. Bourdon tube gauges are rated at a percentage of full scale. Many are a class B (2% of FS from 25% to 75% of FS and 3% of FS for the first and last 25% of FS) or class A (1% of FS from 25% to 75% of FS and 2% of FS for the first and last 25% of FS). Digital gauges are often have a tolerance of a percent of reading or a specific reading ie. +/- 1% of reading or +/- 1 psi (this would be appropriate for a 100 PSI digital pressure gauge. The reason for the numerical tolerance is that to have +/- 1% of reading at 5 psi on that gauge the gauge would have to read out to 5.00 psi, and have that incredible accuracy at the low end of its range. So, if your digital gauge doesn't list it's tolerance as a percentage of FS or a percentage of the reading +/- a specific value or number of digital counts, the manufacturer is not being forthright.
ASME B40.1: Accuracy for Pressure Indicating Dial Type, Elastic Element Gauges
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Tonight I checked tire pressure of the '25 KIA Soul LX . The tire pressure gauge is $11.88 at Walmart . Outdoor temperature was 38 .
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Accurate enough . KIA recommends 33 P.S.I. I think I set them to 34 >34.5 .
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Purchased 9/24/23 and gets plenty of use . So battery holding up .
Can replace the battery . The VICTOR in picture above still works great . The new SPORT is 0.1 increments and the old VICTOR is 0.5 increments . Like the newer tire pressure gauge better for readings .I had something like that but was the Slime brand. works great.. then the battery went dead and I reverted to a mechanical gage , so its like everything.. its great but it has a weakness.