AUTOOL PT520 · Dual-Port Digital Manometer
Compare Differential Pressure and Save Readings
Compare two pressure inputs for positive, negative, and differential-pressure work. PT520 measures from -100 to 200 kPa, stores up to 29 records, and switches among ten pressure units to match varied service references. Seven adapter sizes help connect the dual-port meter to compatible automotive and workshop test points.
- -100 To 200 kPa Range
- Dual-Input Differential Pressure
- Stated ±0.3% FS Accuracy
- Stores 29 Records
- Ten Pressure Units

Key Features
Dual-Port Differential Pressure, Min/Max and 29 Records
High-Precision Pressure Sensor
The broad -100~200kPa range and ±0.3%FS accuracy help provide responsive readings for automotive and workshop pressure checks.
Positive, Negative And Differential Pressure
Dual pressure input ports allow positive pressure, negative pressure, and differential pressure measurement for more flexible diagnostics.
Data Locking And 29-Set Storage
Lock current readings during testing, zero data when needed, and review up to 29 stored records for later reference.
10 Switchable Units
Switch among kPa, hPa, Torr, mbar, inHg, mmHg, inH2O, mmH2O, psi, and kg/cm². PA unit display is not supported in the current version.
Readable Backlit Display
The HD backlit screen shows battery level, data records, Max/Min values, differential pressure, real-time positive and negative pressure, working time, and unit display.
Workshop-Friendly Details
Anti-slip silicone, side lanyard, illumination light, Type-C interface, data lock button, calibration button, and multiple measurement adapters support convenient field operation.
Seven Adapter Sizes
Seven sizes of pressure adapters support connection to different test ports.
Use Supported Units
PT520 supports kPa, hPa, Torr, mbar, inHg, mmHg, inH2O, mmH2O, psi, and kg/cm². Use one of these units during measurement.
Battery Powered
The meter uses 4 × 1.5V AAA batteries. Check battery level on the screen before long tests or field work.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Safe Use
Protect Both Ports from Wrong Media or Range
Application Confirmation
PT520 is suitable for differential pressure, positive pressure, and negative pressure checks within its rated range. Confirm compatibility before special HVAC, gas, or non-automotive use.
Non-Corrosive Media
Use the tool only with suitable non-corrosive oil, water, air, and natural gas pressure checks under proper conditions.
Pressure Units
PT520 supports kPa and hPa display. Choose another model if direct Pa display is required.
Interpret Differential Pressure Results in Context
Confirm both pressure ports, the permitted medium and the expected positive, negative or differential range before connection. Interpret the difference against the exact system and operating condition.
Specifications
PT520 Specifications
| Pressure Measurement & Display | |
|---|---|
| Display Screen | 2.8-inch |
| Pressure Range | -100~200Kpa |
| Measurement Accuracy | ±0.3%FS |
| Resolution | 1hpa, 0.1Kpa |
| Backlit Display Screen | Yes |
| Dual-Channel Pressure Testing | Simultaneously Measure the Pressure at Two Different Locations |
| Multi-Parameter Display | Positive Pressure ValueNegative Pressure Value |
| Pressure Units | KpahPaTorrmbarinHgmmHginH2OmmH2Opsikg/cm2 |
| Data Controls & Equipment | |
| Data Storage | 29 Sets |
| Flashlight Function | Yes |
| Data Lock/Clear/Record | Yes |
| Connections & Applications | |
| Accessory Connectors | 7 Types |
| Applicable Scenarios | Intake ManifoldBrake BoosterCrankcase(Non-corrosive Oil, Water, Air, Natural Gas) |
Manual & Support
Find the Manual and Adapter Guidance

AUTOOL PT520 User Manual
Open the PDF manual for AUTOOL PT520 positive, negative and differential pressure testing, unit selection, adapter setup, saved readings, safe use and troubleshooting support.

Package Contents
See What Comes in the Box
- Main UnitAUTOOL PT520 digital manometer differential pressure gauge
- HosesTransparent test hoses
- AdaptersMultiple connector adapters for different pipeline diameters
- DocumentationAUTOOL PT520 user manual
- PackagePT520 retail box
Buyer Questions
Pressure Connection and Reading Questions
Does PT520 Support PA Unit Display?
No. PA unit display is no longer supported in the current PT520 version. If your workflow specifically requires direct PA display, confirm with AUTOOL Store before ordering.
What Pressure Units Does PT520 Support?
PT520 supports 10 switchable units: kPa, hPa, Torr, mbar, inHg, mmHg, inH2O, mmH2O, psi, and kg/cm². PA is not included in the current supported unit display.
What Is The Difference Between PT503, PT520 And PT530?
PT503 is the entry option with a 1.8-inch screen, ±0.5%FS accuracy, and no data storage. PT520 upgrades to a 2.8-inch screen, ±0.3%FS accuracy, 29 data sets, backlight, and flashlight. PT530 is the higher option with -100~300kPa range, ±0.25%FS accuracy, 99 data sets, button light, magnetic back design, and equipped toolbox.
What Applications Is PT520 Suitable For?
PT520 is suitable for intake manifold vacuum checks, brake booster pressure checks, crankcase negative pressure checks, exhaust valve negative pressure checks, and other pressure measurements within the rated range. It can be used with non-corrosive oil, water, air, and natural gas under proper conditions.
What Accessories Are Included?
Package contents: PT520 main unit, transparent hoses, multiple connector adapters, retail box, and user manual.
Where Can I Download The PT520 Manual?
You can download the AUTOOL PT520 user manual from the Download section in this Description. The manual covers setup, display information, button functions, unit switching, data records, and pressure calibration reference.
How Long Is The Warranty?
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.





