How to install this? it arrived with no instructions, and whne i tried to use it it read less than a perfcet vacuum then would not return to 0.

It can be solved， On the top of the gauge there is a seal plug ， pls open it then close it 。

Dial rests at 20 psi even when plug has been removed. How can I manually recalibrate it?

If you have pulled the rubber plug and it did not go back to 0, that's all you can do apart from bumping it firmly against a rubber surface a couple of times. If that doesn't do it, try raising the pressure close to the maximum limit and releasing it rapidly a couple of times. If that doesn't do, it's trash.

True outdoor durability is limited by plastic lenses. Does this have a glass lens?

It has a lens, not sure if it's glass or plastic. I don't have it with me.

Is there any way to recalibrate the gauge? In case of there being reading error after years of use.

Yes there is, you could pull out and plug back in the silicone plug on the top of the pressure gauge, the pointer will return to zero. Please see the attached video.

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🛠️ Gauge Your Success with Precision & Durability!

BUILT TO ENDURE - Robust stainless steel case and brass internals for unmatched durability and corrosion resistance
SEAMLESS INTEGRATION - Standard 1/4" NPT back connection fits effortlessly into your existing setup
EFFORTLESS MONITORING - Large 2.5-inch dual-scale dial (psi/bar) ensures quick, easy pressure checks at a glance
PRECISION YOU CAN TRUST - Accurate pressure readings up to 50psi with ASME B40.100 compliance
SMOOTH STABLE READINGS - Glycerin filling reduces needle vibration for crystal-clear, reliable measurements

The Uharbour Glycerin Filled Low Pressure Gauge offers professional-grade accuracy up to 50psi, housed in a corrosion-resistant stainless steel case with brass internals. Its glycerin-filled design dampens vibration for stable readings, displayed on a clear 2.5-inch dual-scale dial. Ideal for reliable pressure monitoring of non-corrosive gases and liquids, this gauge combines durability and precision for demanding industrial or professional applications.

€ 75.78

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TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

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Brand	Uharbour
Material	Brass,Material,Plastic,Stainless,Steel
Item dimensions L x W x H	6.9 x 6.9 x 5.6 Centimeters
Screen Size	2.5 Inches
UPC	613965828178
Manufacturer	Uharbour
Country of Origin	USA
Model number	GDD020
Item Weight	191 g
Product Dimensions	6.86 x 6.86 x 5.59 cm; 191 g
Item model number	GDD020
Item Height	2.2 Inches
Item Width	2.7 Inches
Are batteries included?	No

UHARBOUR Glycerin Filled Low Pressure Gauge 50psi/3.5bar, Stainless Steel case, Brass Inside Construction, 2-1/2" dial, 1/4" NPT Back Connection.…

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