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Accurate pressure and vacuum readings are crucial for a wide range of industrial and scientific applications. Whether monitoring system performance, ensuring safety, or conducting precise experiments, the right gauge prevents costly errors and potential hazards. Selecting a gauge that matches your specific needs guarantees reliable data and efficient operation.
INDUSTRIAL PRESSURE GAUGE: Get your machine functioning at peak performance! Made of brass wetted parts for measuring non-corrosive liquid & gas pressure. Great for pumps, compressors, hydraulic presses, machinery, pneumatic equipment, motors & more.
IP65 CERTIFIED: The glycerin-filled circular dial is enclosed in a corrosion-resistant 304 stainless steel case & is IP65 certified for protection against solids, dust, or liquids. This pressure & vacuum gauge is built to last & reliable for years to...
DUAL SCALE GAUGE: This pressure & vacuum gauge features a dual-scale gauge of 30" Hg-0-30 psi/kPa & can be installed anywhere in the circuit to measure pressure at any point. With a durable polycarbonate lens for maximum clarity, providing accurate...
ACCURATE RESULT: Accuracy is + or - 2.5% of full-scale value for 1.5" (40 mm) & 2" (50 mm) gauges & + or - 1.5% of full-scale value for 2.5" (63 mm) & 4" (100 mm) gauge. While the lower mount has 1/8", 1/4" or 1/2" NPT process connection with a restricted...
PRODUCT DETAILS: Variation: PFQ Stainless Steel Liquid Filled Gauge. Dial Size: 2.5" (63mm). Case: 304 Stainless Steel Case. Material: Bronze & Brass internals. Accuracy: + or - 1.5%. Perfect fit with no leaks & is easy to read.
Brass and Stainless Steel wetted parts for measuring non-corrosive liquid and gas pressure. Such as water, oil, air pressure test. Compatible with air conditioning line repair, tank, hvac tools, air pump, pipe, tube vacuum test and etc..
Circular dial is enclosed in a 304 stainless steel case for corrosion resistance. Liquid filled inhibits pointer flutter and prevents damage to the internal mechanics from vibration and pulsation.
Freeze Resistant: Silicone oil ensures long-term work in low temperature(-40~140℉/-40~60℃) and suits for most outdoor conditions and seasons.
Measures pressure with dual scale (-30-0 inHg/-100-0 kPa). Display accuracy is + or - 3/2/3% over the entire range of the gauge.
IP67 waterproof prevent condensation inside caused fogging of the window. Offer clear reading.
High Accuracy Vacuum Measurement: Equipped with a professional Pirani vacuum sensor, the ST-VG90 offers fast and accurate readings with a wide range from 99999 to 0.1 Pa (740000 to 0.75 micron), ensuring your HVAC system is moisture-free before...
4 Pressure Units Available: Easily switch between Pa, mBar, mmHg, and Micron to meet international and industry-specific standards. Designed for both technicians and advanced users who need flexibility in the field
Smart Vacuum Alarm Function: Built-in buzzer and visual alert activate once the preset vacuum level is reached, helping prevent over-evacuation or wasted time during system evacuation
Backlit LCD & Power-saving Design: Clear digital LCD screen with optional backlight ensures readability even in low-light environments. Automatic power-off function preserves battery life
Durable and Pump Compatibility: Compact pocket sized design with one key calibration and quick unit switching works with vacuum pumps of 5 CFM or higher for stable and accurate performance
FUEL PUMP - This pressure gauge set can be used to test fuel pump pressure, emission control devices, leaky, stuck open or burnt valves. Clogged muffler, turbo or exhaust system. Helps to locate leaks in the gas line, valve timing, worn out rings and...
CAR VACUUM TESTER - Also can be used for testing engine vacuum lines, brake assist system, carburetor and intake manifold for leaks, vacuum or pressure loss. Set includes a variety of adapters suitable for most vehicles; Intended for carburetor engines...
PRESSURE GAUGE - The gauge has 4 inches diameter large scale, color-coded measurement, rubber surrounded protective and a hook on the top. so it’s easy to read and use. Range of vacuum dials is 0-28in/Hg Vac, 0-70cm/Hg; Range of pressures dials is...
HOSE AND ACCESSORIES - The kit comes with a 2ft/61cm rubber hose (13/64-inch ID and 23/64-inch OD). The max working pressure is 40PSI. Other accessories include (1)conical adapter, (1)plastic connector, (1) 1/4”x18 male to 1/8”-27 female adapter...
EASY STORAGE - Heavy-duty 11”x 5.7”x 2.4”inch (28cm x 14.5cm x 6cm) plastic blow-molded carrying case for easy transportation, safe storage, and quick organization.
Brass and Stainless Steel wetted parts for measuring non-corrosive liquid and gas pressure. Such as water, oil, and air pressure tests. Compatible with air conditioning line repair, tank, HVAC tools, air pump, pipe, tube vacuum test, etc.
The circular dial is enclosed in a 304 stainless steel case for corrosion resistance. Glycerin filled inhibits pointer flutter and prevents damage to the internal mechanics from vibration and pulsation.
Measures pressure with dual scale (-30 inHg-0-30 Psi/-100-200 kPa). Display accuracy is + or - 3/2/3% over the entire range of the gauge.
IP67 waterproof prevents condensation inside causing fogging of the window. Offer clear reading.
PRV-Tex Series: The circular dial is enclosed in a 304 stainless steel case for corrosion resistance. IP67 waterproof reduces condensation inside causing fogging of the window. Offer clear reading and weather resistance.
Brass and Stainless Steel wetted parts for measuring non-corrosive liquid and gas pressure. Such as water, oil pressure test.
Compatible with air conditioning manifolds, HVAC pipe, espresso, hand pump, tire, pneumatic, portable home air compressor, low-pressure systems, mini split vacuum pump kit, vacuum pumps for resin and etc.
Measures pressure with dual scale (-30-0 inHg/-1-0 bar). Display accuracy is + or - 3/2/3% over the entire range of the gauge
Brass wetted parts for measuring non-corrosive liquid and gas pressure
Circular dial is filled with glycerin and enclosed in a stainless steel 304 case for corrosion resistance
Measures pressure with single (psi) or dual scale (psi/kPa)/(psi/bar)/(Hg. vacuum/kPa)/(Hg. vacuum/bar)
Display accuracy is + or - 2.5% of full scale value for the 1.5" (40 mm) and 2" (50 mm) gauges, and + or - 1.5% of full scale value for the 2.5" (63 mm) and 4" (100 mm) gauges
Lower mount or center back male connection with 1/8", 1/4", or 1/2" NPT rate with restricted orifice
Quickly diagnose internal engine problems such as bad rings valves and leaking head gaskets
Pinpoint hard to find problems such as cracked lines
Kit comes complete with adapters for most applications; sturdy blow molded hard case with removable lid keeps contents protected and secure when not in use
Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Pressure & Vacuum Gauges
Gauge Type
Consider whether you need a pressure gauge, a vacuum gauge, or a compound gauge that measures both. Pressure gauges are used for positive pressures, while vacuum gauges measure negative pressures (below atmospheric). Compound gauges offer versatility for systems that operate in both ranges.
Range and Accuracy
Determine the expected operating pressure or vacuum range for your application. Gauges are rated for specific ranges, and choosing one with a range slightly above your maximum expected value is advisable for longevity and accuracy. Also, consider the required accuracy level. Higher accuracy may be necessary for sensitive processes.
Connection Type and Size
Ensure the gauge's connection type and size are compatible with your existing system or fittings. Common connection types include NPT (National Pipe Thread), BSP (British Standard Pipe), and flange connections. The size of the connection (e.g., 1/4", 1/2") is also critical for a proper seal and secure installation.
Frequently Asked Questions
What is the difference between a pressure gauge and a vacuum gauge?
A pressure gauge measures positive pressure, meaning the force exerted by a fluid or gas above atmospheric pressure. A vacuum gauge measures negative pressure, indicating a pressure below atmospheric pressure, often referred to as a vacuum.
How do I choose the right pressure range for my gauge?
Select a gauge with a range that comfortably exceeds your maximum expected operating pressure or vacuum. A good rule of thumb is to choose a gauge whose maximum reading is about 1.5 to 2 times your normal operating pressure to ensure durability and accuracy.
What does accuracy mean for a pressure gauge?
Accuracy refers to how close the gauge's reading is to the true pressure or vacuum. It's typically expressed as a percentage of the full scale. For critical applications, you'll need a gauge with higher accuracy to ensure precise measurements.
Are there different types of connection fittings?
Yes, common connection fittings include NPT, which is standard in North America, and BSP, prevalent in Europe and other regions. Flange connections are also used for larger pipes or higher pressures. Always verify compatibility with your system's fittings.
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