Accutire MS-4350B Setpoint Tire Gauge

I agree with the other reviewers who said this product needs an o-ring. I found it very difficult to get it to seal on the tire valve stem, but with the o-ring it works perfectly. (Why they don't manufacture it that way I don't know). But by getting an inexpensive o-ring from Ace Hardware you have a product that is outstanding. Another reviewer said the size o-ring he bought was 1/4 x 1/8 x 1/16. However I found this size was too small and didn't fit. I had to get 5/16 x 3/16 x 1/16, and it's a perfect fit. And with tax it cost me a mere .18 cents. An easy modification well worth it.

I bought an O-ring at Ace Hardware [stk no.35774B] and this ring fits perfectly into the inside of the sensor. Around the hole which makes contact with the metal tire stem. Walla ! the leak problem has stopped and one gets a very tight fit onto the stem curing the problem.

The exact size of the this rubber O-ring 1/4 x 1/8 x 1/16. [#60 O-ring]

at Ace Hardware. So one does not even need to cut or glue this thing to make it work. Give it a try! Cure the problem for sure. The part cost me

.74 cents.

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The Accutire "Setpoint Tire Gauge," model MS-4350B from "MSI Sensors" (aka "MS-4350: Digital Set Point Programmable..." from "Measurement Specialties"), UPC 1550710566, has seven nice features. First, it's easy to hold. The bottom of the larger-than-usual body is rubberized, and the shape allows you to firmly press it onto a tire valve stem with a thumb. Second, there is an LED light activated by a big round button on the back. Third, the screen is backlit and the numbers are large. Fourth, there is no need to turn it on/off. Instead, you can push the nozzle onto the valve, and it displays the measurement; about 15 seconds later, it turns itself off. Fifth, it beeps when an accurate reading is taken. Sixth, the two CR2032 lithium batteries will presumably last a long time, and can be replaced if they wear out. Finally, if you keep forgetting how much air is needed, you can program separate front & rear target pressures.

UNFORTUNATELY, it's hard to obtain a solid seal on valves. It's the same problem noted here and in reviews of "Accutire MS-4000B Deluxe Backlit Lithium Digital Tire Gauge" on Amazon.com. One September 24, 2004, review there by "Crazy Dude" says "because you're pressing plastic (the gauge) against metal (the tire air stem), you must hold it perfectly flush or air will escape, making a reading difficult to get."

So to improve my gauge I more-or-less followed the instructions of "Crazy Dude," which were: "I used '3M Scotch linerless rubber splicing tape.' The thickness is important. I used .03 in. (.761mm). I wouldn't go any thicker. ... All you need to do is cut it to the diameter of the inside of the gauge's mouth, then cut out a small hole for the air hole."

Since my home has no rubber tape, I took a wide pink rubber band (from a bunch of broccoli) about 0.75mm thick. I cut a gasket about 7.5mm diameter with a 3mm hole and glued it in place. Now it works like a charm. If you have the time to make this modification, buy it from Amazon.com!

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The progammable features are nice, but I should have listened to the other reviews. Those folks that said this gauge doesn't make a good seal with the tire were right on the money. The first time I tried it I let at least 5-6 psi out of the tire. After playing with it for about 20min, I still could only get a good seal after letting about 2-3 seconds of air out of the tire. This thing stinks and I would not recommend it to anyone.

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I can't believe that so many people rate this thing so highly. And I also can't believe that more people don't complain about how non-user friendly it is!

For one thing, you should be able to turn it on and use it, not have to go through several screens just to check your tire pressure! After you program it, when you turn it on the display should immediately come on to the part where you can check either the front or back tire pressure, without having to go through several screens just to get to the one you need.

Moreover, I'm surprised that Charles T. Walsh was the only reviewer who wrote "What's worse is that when it beeps (to tell you that you have a good reading) if you don't immediately remove it, I mean a flash fast muscle twitch reaction, it resets itself and erases the reading it just took." How true, Charles! The thing resets itself so quickly (forcing you to go through the cumbersome task of once again going through several screens just to get to the one to read your tire pressure) that after trying it several times, I also gave up and just used my good old manual standby.

O'well. Different strokes for different folks, I guess!

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