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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UHARBOUR Glycerin Pressure Gauge 60psi/4bar, 2-1/2" Dial 1/4" NPT Back

UHARBOUR Glycerin Pressure Gauge 60psi/4bar, 2-1/2" Dial 1/4" NPT Back

Product ID: 245510592

Details

Brand
Uharbour
Item Highlight
Low Pressure
Item Weight
0.18 kg
Item dimensions L x W x H
2.7 x 2.7 x
Material
Brass Plastic

💧Glycerin-filled vibration dampening

⏱️60psi/4bar precision range

🛡️Stainless steel corrosion resistance

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Description

🛠️ Measure with Mastery — Don’t Let Pressure Catch You Off Guard!

BUILT TO ENDURE - Durable stainless steel case and brass wetted parts resist corrosion and extend gauge lifespan beyond ordinary models.
COMPACT YET POWERFUL - Compact 2.7" dial with 1/4" NPT rear mount fits seamlessly into your setup without sacrificing performance.
PRECISION YOU CAN TRUST - Professional-grade accuracy compliant with ASME B40.100 standard ensures reliable pressure readings every time.
VIBRATION RESISTANT CLARITY - Glycerin filling smooths out pulsations and vibrations, delivering stable, easy-to-read measurements on a crisp 2-1/2" dual-scale dial.
CONFIDENCE IN EVERY PURCHASE - Backed by friendly customer support and a trusted brand, saving you time and money with every accurate measurement.

The UHARBOUR Glycerin Pressure Gauge offers professional-grade accuracy up to 60psi/4bar, housed in a corrosion-resistant stainless steel case with brass internals. Its glycerin-filled dial reduces vibration effects for stable readings, featuring a clear 2-1/2" dual-scale display. Designed for durability and precision, it’s the go-to gauge for reliable low-pressure measurement in industrial and scientific applications.

Specifications

ASIN	B09T378FD3
Best Sellers Rank	#12,666 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Industrial Pressure Gauges
Brand Name	Uharbour
Customer Reviews	4.1 4.1 out of 5 stars (11)
Item Dimensions	2.7 x 2.7 x 2.2 inches
Item Weight	0.18 kg
Manufacturer	Uharbour
Material Type	Brass, Plastic, Stainless Steel
Model	GDD021
Part Number	GDD021
UPC	613965828185

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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$28.79

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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The delivery time was excellent, and the packaging was secure.

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