Dial type vs. Pen type tire gauge

[red_one]

yespo.
but it's true. within their useful range, those springs have a linear relation with pressure.
what i do, is to mark the pressures that i use. never mind the others. and to make sure the dial cover doesn't move, i glue the edges.

i measure the "correct" tire pressure with an accurate gauge. then i use my dial gauge. whatever mark my needle points to, i write the "correct pressure".

Good tip. Just make sure the gauge is precise, i.e. it gives the same result even when you measure multiple times. Then you can mark the spot you need.

[red_one]

Accuracy vs Precision

Accuracy is how close a measured value is to the actual (true) value.
Precision is how close the measured values are to each other.



Examples:



Low Accuracy, High Precision



High Accuracy, Low Precision



High Accuracy, High Precision

[red_one]

Here's my new tire pressure gauge. No time to test yet so I will just give my first impression of the Stetho-Gauge.

Build quality is good and feels solid. There is a serial number sticker on the gauge body. Each unit has a different serial number so no fakes here. Sticker says "International Patents Pending. Made in Taiwan."

The face of the gauge is very clear and easy to read. On the left side, there is a crest and the word "Hafner" underneath. I could only assume that it uses parts from "Hafner" (Philipp Hafner GmbH & Co. KG), a high-precision parts and equipment manufacturer in Germany.

The unit comes with a plastic storage case. There is a sticker with "How To Use" instructions at the back of the case. The packaging mentioned "ANSI Grade B Accuracy" and "Shock Resistant" among other features. There is instructions and illustrations at the back of the packaging.

[andrewnathaniel]

magkano ang stetho gauge bro?

Yung sa uncle ko, stetho gauge, early 2000's pa nya yun. Until now, okay pa din, medyo hindi na nga lang accurate. Sa kalumaan na lang din siguro, around 10years na siguro yung tire gauge nya na yun. Ang estimate ko 30-32 psi yung gulong, sa casa ko pa pina-Inflate, halos 5 hours din kame sa casa so nung ininflate yung tire, malamang cold na.Ssa tire gauge ko (Elevo brand) 22 psi, sa kanyang gauge (Stetho) 26 psi.

[kotiko]

Just a reminder guys, whenever you have a tire vulcanized always drop by a nearby gas station to check the tire pressure afterwards.

Every time I have a tire vulcanized whether at a reputable shop or the ones by the street, they always end up overinflating the tire even if they "ask" you what tire pressure you want after they do the initial fill up to re-check the puncture/s. Whenever I drop by a gas station tire guage afterwards, I always find the tires overinflated, usually around 40psi.

Anyway, I use a dial type. Buy the ones made of metal, the ones made of plastic that's worth less than P100 gets busted easily. I still do have one that's plastic. There's 1-2psi difference vs. the digital ones in gas stations but at least you get an idea if you're getting underinflated.

[andrewnathaniel]

Una ko nabili made of plastic. Binalik ko sa Handyman at niReplace ng made of metal. Ang hirap gamitin nung plastic type. Lagi sumisingaw ang hangin, while yung metal type, isang salpak lang kuha na agad ang tire pressure.

Ask ko lang, kung sakaling galing ka sa byahe then dropped ka sa gas station para mag-inflate ng tire then set mo halimbawa is 32 psi. Sa cold tire kaya eh 32 psi pa rin ang reading o less than?

[dr. d]

hafner has authorized a taiwanese firm to manufacture their precision instruments in part or in whole?
i'm asking because i know not the answer.

oops... i quick-googled, and it appears hafner tire gauges are a taiwanese product and do not appear to be related to any german or european...