AUTOOL Manometer Gas Pressure Tester, Digital Manometer HVAC, 6 Units Differential Dual Port Pressure Gauge -101 to 200Kpa, Data Zeroing with Backlight LCD Display

Great tool. My husband uses it all the time. Good quality.

This Autool digital manometer / differential pressure gauge has a range of -14.6 to 29.0 PSI. It is powered with two included AA batteries and comes with two 16" silicone rubber tubes and one that's 39" as well as a wide variety of fittings for measurements. Note: This manometer DOES NOT have a low enough range to measure differential pressure across home furnace filters - you will get a zero differential pressure value even though the gauge is working properly. Pros: The product description on Amazon is accurate and useful. Similar to other Autool products, this gauge is well constructed. The LCD digital readout is clear, backlit, and easy to read. There is a wide variety of included fittings for various measurements. I compared readings to a calibrated digital manometer and a not as accurate Bourdon gauge. The readings are as expected. Cons: The packaging is minimal - the kit does not include a case or pouch to protect the instrument and carry the accessories. Minus one star. Overall: This Autool digital manometer is a well made product and a good value if the pressure range fit your needs. Recommended!

I am slowly building up an inventory of diagnostic tools to service my two-stroke chainsaws. It seems like it's a question of when and not if when an issue will arise so I ordered this manometer for performing a crankcase leak test. The need has not arisen yet (knock wood) but this tool should be suitable for measuring both the 7-10psi of positive pressure and the -7 to -10 psi of vacuum needed for testing crankshaft seals, the cylinder base gasket and the intake boot. The tool itself appears to be well made with a variety of fittings and connectors, the plastic molded case with rubber grips provides a combination of durability and grippability. The display is backlit but also monochrome and easy to read in any light condition.

This review is for the AUTOOL Manometer Gas Pressure Tester, Digital Manometer HVAC, 6 Units Differential Dual Port Pressure Gauge -101 to 200Kpa, Data Zeroing with Backlight LCD Display, which was selling for $37 at the time of this review - SEE MY NOTE at the end of this review. I haven't had this long so I can't give any long-term evaluation, but I have used it to verify engine vacuum and test boost losses through the system on a couple of custom turbo projects, and so far it is working well. For the money, I am satisfied. The "instructions" were sufficient but not great. People who aren't familiar with using a manometer would probably have some benefit from a suggested uses handout, either in the ad or in the package (or both). NOTE - If you are not familiar with Amazon Vine, it is basically Amazon trading products for honest reviews. NOTE that the items are NOT Free because Vine Members have to pay Income Tax on the value of the item, so the product is discounted but definitely not free, more like 1/3 to 1/2 price. As such, I don't order things that I don't NEED and USE!!! This is an important distinction because it should give you more faith that my reviews are not some fake nonsense boilerplate... I USE WHAT I ORDER, and I don't hold back if something is junk because I still had to pay for it... and this program actually bumped me up to a higher tax bracket in 2025, so it definitely wasn't free!

My particular use for this tool isn't typical at all. I was looking for a way to measure relatively small differential pressures in a benchtop test rig. It's used for testing various solutions for gas flow through a conduit with branches and valving. Turns out this device is in just the right pressure range and has just the right features for my needs. Compared to our old rig, it seems very accurate. It's relatively easy to use. It included a nice selection of fittings and such, but no case to keep everything in. It looks well-made, it functions well, and the price point was quite low for such an instrument. Would do it again.

This seems to be accurate and well calibrated. When I compared the readings to my old analog needle gauge manometer, they were very close. I've trusted that old one for years. Once I get used to this digital manometer, it seems like it will be much easier to use. I don't have to manually calculate unit conversions anymore, it's easy to switch with the push of a button. It gives readings very quickly. The LED display was easy to read in sunlight. I got this for an upcoming HVAC project. We'll be doing the duct work ourselves, but I've already put it to use working on my truck this weekend. It helped me pinpoint a vacuum leak. It's worked well for me so far. It appears to be a good quality tool. It's compact and doesn't take up much space in the drawer of the toolbox I keep my other specialty diagnostic tools in. The included adapters appear adequate for most jobs I'll use it for. It's a great value for the price.

This AUTOOL PT503 digital manometer is a solid, professional-feeling tool for HVAC/gas pressure checks. It measures differential pressure from about -101 to 200 kPa with ±0.5% full-scale accuracy, and you can switch between six units (psi, kPa, mbar, bar, inHg, mmHg), which makes it practical if you work across different specs. A couple features make it genuinely usable in the field: it auto-zeros on startup for atmospheric calibration (so long as you power it on with no pressure applied), has a data hold/lock so you can freeze readings, and the backlit LCD is easy to read in low-light mechanical spaces. It also comes as a complete kit—silicone tubing plus multiple connectors—so you’re not immediately hunting for fittings to make it work with common valves/ports. The listing also notes a 3-year warranty and lifetime technical support, which is reassuring for a diagnostic tool. Pros: Accurate range, 6 unit modes, auto-zero + data hold, backlit screen, includes tubing/connectors Cons: None so far (just remember: don’t power on while pressurized

I’ve only used this once so I haven’t had the chance to really get into all of the features of it but was able to verify the results with a coworkers pressure tester and it was accurate. I also had any to say it looks and feels like it’s well made with quality materials and software which is made easier to use on the decent sized screen with the different features. I picked this up on a whim but as a mechanic I know I’ll use it for multiple things. No matter what it will still come in handy testing vacuum pressures period not just on fuel lines.

Have to re start when it goes off

Gerät im niedrigen Bereich unverwendbar. zu ungenau. Gerät kommt somit retour.

Bought to check pressure in ventilation system but would not register any pressure difference. Returned.