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Accurate vacuum measurements are crucial for a wide range of industrial and scientific applications, from maintaining sterile environments in laboratories to ensuring optimal performance in manufacturing processes. Selecting the correct vacuum gauge can significantly impact the precision of your work and the reliability of your equipment.
SUPERIOR ACCURACY: Calibrated to strict NIST standards to ensure optimal precision and reliability during evacuation procedures, making it the preferred choice for professionals who demand accuracy.
FLEXIBLE UNIT SELECTION: Easily switch between microns, millibar, torr, and inches/hg with just two buttons, allowing for versatile application and adaptability to different measurement requirements
AUTOMATIC TEMPERATURE COMPENSATION: No manual adjustments are needed as the digital vacuum gauge automatically compensates for varying temperature conditions, delivering consistent readings in any environment
DURABLE AND USER-FRIENDLY: Features a cleanable sensor that withstands up to 400 PSI positive pressure, along with a large, easy to read 5-digit LCD display for enhanced usability and durability
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.
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.
UPGRADED ELITECH TOOLS APP(ioS and Android): An intergraded app, that allows users to manage all Elitech tools such as vacuum pump, digital manifold, vacuum gauge, pressure gauge, refrigerant charging scale on one app, more efficient and more intelligent.
MULTIFUNCTIONAL DESIGN: Settable target, notifications will be sent when readings exceed the predetermined value. The data can be recorded and exported in Excel and PDF format.
INTELLIGENT JUDGEMENT OF H2O STATUS: The vacuum meter automatically judges physical state of H2O by comparing ambinent temperature and water saturation temperature corresponding to the vacuum in the system.
LARGE DISPLAY: Continual digital readout of evacuation process can be viewed easily on the large, full-view LCD screen.
Accurate: The testo 552i vacuum gauge delivers deep-vacuum measurements down to single-digit resolution with an accuracy of ±10 micron + 10% of mv (100-1000 micron). This gives you confidence that evacuation targets are reliably reached and verified
Easy-to-use: The micron gauge features an integrated 45° angle for quick, stress-free installation at any service port, while the robust IP54 housing ensures dependable operation even in demanding HVAC environments
Clever: For wireless vacuum measurement, the testo 552i vacuum gauge automatically connects to testo digital manifolds and operates via a single service port. Saving time, reducing setup complexity, and preventing refrigerant loss
Efficient: The hvac tool enables fast vacuum assessment and displays live measurement data directly on testo digital manifolds and in the testo Smart App, so you can make informed decisions without interrupting your workflow
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...
Achieve highly accurate micron readings by connecting the MG44 directly to the system port; the innovative reversible angled coupler ensures a secure fit and reliable seal even in tight or awkward spaces
With 3 ways to use, Stand Alone, Job Link System App & SMAN Manifold Screen, this micron wireless vacuum gauge is built to make your work easier
Confidently pull and verify deep vacuums with precision measurements from 50 to 2000 microns displayed clearly on the backlit LCD and view by rate, bar graph or rate meter to ensure accuracy
Long battery life (40 hours typical alkaline), wireless range of 1000 feet (305 meters) line of sight and radio frequency of 2.4 GHz
Professional Fuel Pump Pressure & Vacuum Tester Kit: This comprehensive kit is designed for testing fuel delivery pressure to the engine, making it an essential tool for diagnosing worn or defective parts. It is also highly effective in diagnosing various...
User-Friendly Design: Our fuel pump pressure & vacuum tester gauge kit is designed with user convenience in mind. It includes an instruction manual for easy setup and operation. The kit boasts a 4-inch (10.2cm) diameter pressure gauge with color-coded...
Versatile Applications: This vacuum and fuel pump tester gauge kit is incredibly versatile and capable of performing four different tests, including fuel pump pressure, fuel pump vacuum, carburetor intake manifold, and vacuum tests. The kit is capable of...
Comprehensive Package: The kit includes everything you need for thorough testing. It contains 1 vacuum pressure gauge, 1 2-foot (61cm) long rubber hose (13/64-inch ID 23/64-inch OD), 1 brass cone adapter, 1 plastic connector, 1 1/4”x18 male to...
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
[ACCURATE VACUUM MEASUREMENT FROM -30 inHg TO 0 PSI]: Measures vacuum pressure from -30 inHg to 0 PSI with clear PSI and Bar dual scale, providing accurate and easy-to-read measurements for vacuum systems, pumps and industrial equipment.
[2.5" DIAL WITH 1/4" NPT LOWER MOUNT]: Features a 2.5 inch dial and 1/4" MNPT lower mount connection for easy installation on compatible vacuum systems, pumps and equipment.
[GLYCERIN FILLED FOR STABLE READINGS]: The glycerin-filled design helps dampen vibration and pulsation effects, providing more stable readings in demanding working environments.
[DURABLE STAINLESS STEEL CONSTRUCTION]: Built with a stainless steel housing, copper alloy connection, movement and Bourdon tube for reliable performance and durability in demanding environments.
Last update on 2026-10-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Vacuum Gauges
Understanding Vacuum Gauge Types
Mechanical Gauges: These are simple, robust, and often cost-effective. They typically use a Bourdon tube or diaphragm to indicate pressure. Common types include aneroid barometers and diaphragm gauges, suitable for rough vacuum applications where high precision isn't paramount.
Digital Gauges: Offering greater accuracy and easier readability, digital gauges often employ electronic sensors. They can provide numerical readouts and sometimes data logging capabilities. Types include Pirani gauges for medium vacuum and capacitance manometers for high vacuum.
Compound Gauges: These versatile gauges can measure both positive pressure and vacuum, making them useful for systems that operate in both ranges or require monitoring for leaks.
Key Specifications to Consider
Measurement Range: Ensure the gauge covers the entire vacuum range required for your application, from atmospheric pressure down to the lowest achievable vacuum level.
Accuracy and Resolution: Higher accuracy means a more precise reading. Resolution refers to the smallest change in pressure the gauge can detect.
Response Time: For dynamic systems, a gauge with a quick response time is essential to accurately track pressure fluctuations.
Connectivity and Output: Some digital gauges offer analog or digital outputs (e.g., USB, RS-485) for integration with data acquisition systems or control loops.
Installation and Maintenance
Proper installation is critical for accurate readings. Ensure the gauge is connected to the vacuum system without leaks and in the appropriate orientation as recommended by the manufacturer.
Regular calibration is often necessary to maintain accuracy, especially for high-precision applications. Follow manufacturer guidelines for calibration intervals and procedures.
Consider the operating environment. Extreme temperatures, vibration, or corrosive substances can affect gauge performance and lifespan.
Frequently Asked Questions
What is the difference between absolute and gauge pressure?
Absolute pressure is measured relative to a perfect vacuum, while gauge pressure is measured relative to the ambient atmospheric pressure. Vacuum gauges typically measure absolute pressure.
How do I know which vacuum range I need?
The required vacuum range depends on your specific application. Research the typical vacuum levels needed for processes like refrigeration, vacuum packaging, or scientific experiments to determine the appropriate gauge.
Can I use a mechanical gauge for high vacuum applications?
Generally, mechanical gauges are best suited for rough vacuum levels. For high vacuum or ultra-high vacuum applications, electronic gauges like Pirani or capacitance manometers are recommended for their accuracy and wider measurement range.
How often should a vacuum gauge be calibrated?
Calibration frequency depends on the gauge type, its accuracy requirements, and the harshness of the operating environment. For critical applications, annual calibration is a common practice, but consult the manufacturer's recommendations.
What are the common units of vacuum measurement?
Common units include Pascals (Pa), millibar (mbar), Torr, and inches of mercury (inHg). Ensure the gauge you choose displays measurements in units relevant to your application or industry standards.
As an Amazon Associate, we earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change.
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