Accutire MS-4021B Digital Tire Gauge

by Accutire

• Heavy duty construction and rugged design for long lasting use
• Angled head and rubber coated handle for easy gripping
• Large, easy-to-read LCD display
• Equipped with an automatic shut off to prevent deflation
• Accurate to within 0.05 PSI, reading air pressure from 5-150 PSI in 0.5 pound increments

Product Description

Features heavy-duty construction to withstand shifting around in your glove compartment. Designed to last, it has an angled head and rubber coated handle for easy gripping. The LCD display is large and easy to read. If you forget to turn the gauge off, don't worry, it is equipped with automatic shut off. The gauge will read within 0.05 PSI. The lithium battery will never need to be recharged or replaced. This gauge measures air pressure from 5-150 PSI in 0.5-pound increments.

Most Helpful Customer Reviews

585 of 607 people found the following review helpful

5.0 out of 5 stars Please ignore the other 1-star reviews...they didn't know what they were doing...this gauge is perfect! March 11, 2006

By NM02

Please ignore the other two users that gave this gauge only one star because it only read 28.5 psi. I find it amusing, but sad, that they didn't realize that there was a protective sticker on the screen that read 28.5. If you peel off that protective sticker, then you get a nice, bright red backlit number displaying your true tire pressure. This gauge works great! The display is amazingly easy to read, and it is also simple to get a good reading.

Prior to owning this Accutire model, I had a 7 year old Accutire digital gauge that finally broke. WIth that old model, it was much harder to get a reading without air leaking out. With this new model, if you just push the gauge straight into the valve stem, you easily get a solid reading without leaking air. The old model's display wasn't backlit either, and I was truly impressed with the large, bright numbers on this new model. I'd highly recommend getting this gauge, as it has all the functionality you need, at a very reasonable price. I like having accuracy to 0.5 psi, and I never use non-digital gauges unless I have no other choice. I also tested this gauge with back-to-back measurements, and it was accurate every time. You won't regret this purchase...

116 of 120 people found the following review helpful

5.0 out of 5 stars excellent tool! February 22, 2006

By James P. Lammers

Amazon Verified Purchase

This is by far the best tire gauge I've ever had. It lights brightly, easy to see even in sun and always visible at night. Accuracy is high, construction quality is excellent. Highly recommended!

307 of 343 people found the following review helpful

3.0 out of 5 stars Uses lots of batteries. November 2, 2007

By Randy D.

Amazon Verified Purchase

While this product works fine, and is accurate, it uses (3) A76 watch batteries. That's a lot of batteries. and the batteries generally only last about 6 months. I have to pay $2 ea for the batteries. Total $6 each time. That's $12 a year. and the unit only cost $8.
Maybe a unit that uses lithium or other long-lasting batteries would be better.
Next time, i think i will try one of the better, more-expensive units.

74 of 80 people found the following review helpful

1.0 out of 5 stars Accurate but not durable September 19, 2008

By Shaun D

Amazon Verified Purchase

I found the tire gauge readings to be accurate, and initially this meter was easy to use and quick to take a measurement.

However, within 5 months, the plastic part of the gauge that you put onto your tire had deformed to the point that it would no longer take a reading from a tire. I do not work at a mechanical shop, and I have one car and I had taken a reading about once a week for 4-5 months.

I would not recommend this product.

48 of 52 people found the following review helpful

2.0 out of 5 stars Reliable and accurate, but with one fatal flaw November 21, 2008

By Ford Engineer

I've owned two versions of this gauge: An LCD version that I bought 7 or 8 years ago, and the more recent LED type. Aside from the display technology, they looked identical.

They were both accurate and reliable, but they both also had very poor sealing against the tire valve. The rubber ring that seals against the valve is too hard and uneven. You have to line the gauge up very precisely, and press very hard to avoid a burst of air escaping from the tire. If you don't get a good seal, the reading can be off, and a couple of bursts of air is enough to drop a tire by 1 psi. Every time I checked my tires, this happened on at least one or two of them. It's bad enough that I got into the habit of overfilling the tires by a couple of psi so that when this happened I would not end up below the desired pressure.

I finally got tired of it and bought a $26.00 gauge at Sears that seems to be just as accurate and does not have this problem.

113 of 130 people found the following review helpful

5.0 out of 5 stars If your gauge always shows 28.5 PSI... February 2, 2006

By Shane Burnett

...try peeling the protective plastic film off the LCD display. The film is imprinted with a "28.5" to simulate the gauge's display so it looks more attractive when it's on the rack at the store.

22 of 22 people found the following review helpful

5.0 out of 5 stars Easy to use and nearly idiot proof May 17, 2006

By George S.

Amazon Verified Purchase

I bought two of these gauges, one for my air compressor accessory kit and one for my daughter's car. Calibration is extremely easy and the readings are in 0.5 psi increments. No more moving parts and messed up readings. There's no gasket on the stem where it touches the tire valve but that didn't seem to be a drawback at all. You don't even have to wait for the last reading to clear before taking another. Nothing fancy, just practical and handy.

39 of 43 people found the following review helpful

1.0 out of 5 stars broken after <10 uses March 17, 2010

By Rock Beaver

Amazon Verified Purchase

I got this one a year ago and used less than 10 times. It worked OK until now. It is showing "01.0" only, on my car tires, bike tires, whatever. Changing the 3 x 1.5v button batteries did not help. So I opened it and found there is another battery inside, a 3v button one, which I am pretty sure ordinary users will never find out or imagine that it even exists (I also found two big pieces of fallen solders inside, kind of clinging to the 3v batter). So I replaced that battery too. Still, it shows "01.0" only. And then the LED display fell off place while I was taking apart the gauge. So this is the end of it. I am going to have to find another one, for my bike which needs a range up to 110psi. I won't buy AccuTire again. BTW, the AccuTire "sensor" is actually a little touch switch pressed against a circuit board when air pressure is exerted upon and the touch switch can be easily contaminated due to poor seal.