The liquid filling dampens vibration, mechanical shock, and pressure pulsations for easier readings. It protects against corrosion, moisture, and atmospheric icing while lubricating moving parts to significantly reduce wear.

How to choose the right scale range?

The user must ensure that the appropriate pressure gauge has been selected in terms of scale range and design. The scale range is optimally selected when the operating pressure lies in the middle third of the scale range.

Where are liquid filled pressure gauge used?

Examples include Pressure washers and sprayers; Paint spray equipment; Compressors; Irrigation equipment; Hydraulic systems; Hydraulic hand tools

Why doesn't the gauge return to zero?

Release system pressure first. After shipping or temperature changes, case pressure may not balance, so the pointer may not return to zero. Briefly remove or loosen the top plug to equalize pressure, then reseal it. Never remove under pressure.

Why isn't the gauge fully filled with liquid? Are bubbles normal?

Normal. Liquid expands and contracts with temperature. A 100% fill could raise internal pressure when hot, causing lens bulging, leaks, or inaccurate readings. Gauges are usually filled to about 85%, leaving a small buffer. Slight bubbles are normal.

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SENCTRL 30 inHg Vacuum Silicone Oil Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Air Conditioning Manifolds, HVAC, Air Pump Vacuum Test

Product ID: 546259039

Details

Brand
senctrl
Item weight
0.17 Kilograms
Material
Stainless
Number of Items
1
Thread type
1/4" NPT Male

💧IP67 waterproof rating prevents fogging

🌡️Silicone oil liquid-filled for -40~140℉ freeze resistance

🛠️304 Stainless Steel corrosion-resistant case

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Description

🔧 Master your vacuum game with precision and durability!

SEAMLESS INTEGRATION - Standard 1/4" NPT lower mount fits effortlessly with air conditioning manifolds, pumps, and vacuum test setups
ALL SEASON RELIABILITY - Operates flawlessly from freezing cold to scorching heat (-40 to 140℉), perfect for outdoor HVAC jobs
VIBRATION PROOF LIQUID FILL - Silicone oil dampens pointer flutter for stable, reliable readings even in pulsating environments
RUGGED STAINLESS STEEL BUILD - Durable 304 stainless steel case and brass wetted parts resist corrosion for long-lasting use
PRECISION DUAL SCALE READINGS - Accurate vacuum measurement with ±3% tolerance across inHg and kPa scales

This 2.5" dial vacuum gauge features a corrosion-resistant stainless steel case and brass wetted parts, filled with silicone oil to prevent pointer flutter and withstand temperatures from -40 to 140℉. It offers dual-scale pressure readings (-30 to 0 inHg and -100 to 0 kPa) with ±3% accuracy, an IP67 waterproof rating to avoid fogging, and a 1/4" NPT lower mount for seamless HVAC and air pump vacuum testing.

Specifications

ASIN	B0BCYMT1RT
Brand Name	senctrl
Customer Reviews	4.5 4.5 out of 5 stars (214)
Included Components	Vacuum Gauge
Item Weight	0.17 Kilograms
Manufacturer	senctrl
Material Type	Stainless Steel Brass
Number of Items	1
Number of Packs	1
Part Number	Y.6TSL04
Thread Style	1/4" NPT Male
Unit Count	1 Count

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$40.56

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In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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TrustScore 4.5 | 7,300+ reviews

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