Does it give psi or psig? The gauge face shows the unit in psi (also see product details), while the temp-pressure mapping appears to be F-psig.

PSIG only. When disconnected the gauges read zero. The P-T chart for R-134a is fairly accurate to within around 3 degrees F, as far as I can tell, which means it is definitely PSIG/TempF.

Is this fahrenheit? i do not want celsius? the pictures show f but the third bullet point on the description says celsius? what is the truth?

These have Fahrenheit scale on them.

Under what circumstances should the pins (as shown in D, similar to tire valve pins) be unscrewed from the ends of hoses using the red tool?

I would say these are extra valve cores in case one goes bad

Are these low loss fittings?

If you buy this product, you will get: 1pc 3-way HAVC freon gauge (1/4" male), 3pc hoses (1/4" female), 2pc quick couplers (1/4" male), 1pc ACME adapter (1/4" Male to 1/2" Female), and 1pc can tap (piercing-style) (1/4" male). They are of good quality. If you need any further assistance, please feel free to contact our customer support. We will offer assistance in a timely manner.

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OMT 3-Way AC Gauges for R134a R12 R22 R502 Refrigerant, 5ft Hoses

Product ID: 124255794

Details

Brand
Orion Motor
Item Weight
1.6 Kilograms
Item dimensions L x W x H
8.27 x 7.48 x
Material
Aluminum Brass
Thread Type
1/4-28 Npt

⚙️Solid brass build with 1.6% calibration accuracy

🛠️3-way gauge with 2.6" hybrid antishock dials

🔴🔵🟡Color-coded 5ft hoses rated for 600 psi daily use

$175.21

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Description

❄️ Master Your AC Game with Precision & Power!

COLOR CODED EFFICIENCY - Blue, red, and yellow hoses simplify diagnostics and charging with reinforced 4-layer PVC strength.
BUILT TO LAST PERFORM - Solid brass, ABS, and rubber construction with moisture indicator and 1-year warranty for peace of mind.
READY FOR ANY REFRIGERANT - Compatible with R134a, R12, R22, and R502 for versatile HVAC and automotive AC servicing.
PRECISION MEETS DURABILITY - Hybrid oil-filled core + dry dial gauges ensure shock resistance and winter-ready accuracy.
PRO GRADE ACCESSORIES INCLUDED - Quick couplers, 29° trap adapter, and self-sealing can taps for seamless, professional repairs.

The OMT 3-Way AC Gauge Set is a professional-grade automotive and HVAC tool featuring hybrid antishock 2.6" gauges, durable solid brass construction, and color-coded 5ft hoses rated for up to 600 psi. Compatible with multiple refrigerants (R134a, R12, R22, R502), it includes quick couplers, a 29° adapter, and self-sealing can taps, making it ideal for precise pressure measurement, evacuation, and coolant recharge. Designed for longevity and accuracy with a 1.6% calibration tolerance and moisture indicator, this kit is trusted by pros and DIYers alike.

Specifications

ASIN	B07JLQTK9C
Best Sellers Rank	#10,746 in Automotive ( See Top 100 in Automotive ) #5 in Air Conditioning Diagnostic Equipment
Brand	Orion Motor Tech
Brand Name	Orion Motor Tech
Customer Reviews	4.3 out of 5 stars 2,145 Reviews
Included Components	1 x 3-Way Gauge, 3 x Hoses, 2 x Quick Couplers, 1 x 29° Adapter, 2 x Can Tap
Item Dimensions	8.27 x 7.48 x 3.54 inches
Item Highlight	Includes R134a Couplers Self-Sealing Piercing Can Taps 29° Adapter; Solid Brass Build; Ideal for Auto Freon Recharge Item Highlight Includes R134a Couplers Self-Sealing Piercing Can Taps 29° Adapter; Solid Brass Build; Ideal for Auto Freon Recharge See more
Item Weight	1.6 kg
Item dimensions L x W x H	8.27 x 7.48 x 3.54 inches
Manufacturer	Orion Motor Tech
Material	Aluminum, Brass, PVC
Material Type	Aluminum, Brass, PVC
Model	OMTDMG201901
Number of Items	1
Number of Packs	1
Part Number	OMTDMG201901
Thread Style	1/4-28 Npt
Unit Count	1 Count
Warranty Description	1 year

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$175.21

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ecuador.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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