AUTOOL PT520 Dual-Port Differential Pressure Gauge
US$70.00
- Dual-Port Differential Test
- -100–200 kPa Range
- 29-Set Data Storage
- Ten Pressure Units
- Dual-Port Differential Test: Use two pressure inputs for positive, negative, and differential pressure measurements.
- -100–200 kPa Range: Measure across -100 to 200 kPa with ±0.3% FS accuracy.
- 29-Set Data Storage: Lock, zero, and review up to 29 stored pressure records.
- Ten Pressure Units: Switch among kPa, hPa, Torr, mbar, inHg, mmHg, inH2O, mmH2O, psi, and kg/cm².
- Seven Adapter Sizes: Connect the handheld meter to varied test ports with seven pressure-adapter sizes.
- Dual-Port Differential Test: Use two pressure inputs for positive, negative, and differential pressure measurements.
- -100–200 kPa Range: Measure across -100 to 200 kPa with ±0.3% FS accuracy.
- 29-Set Data Storage: Lock, zero, and review up to 29 stored pressure records.
- Ten Pressure Units: Switch among kPa, hPa, Torr, mbar, inHg, mmHg, inH2O, mmH2O, psi, and kg/cm².
- Seven Adapter Sizes: Connect the handheld meter to varied test ports with seven pressure-adapter sizes.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
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.
Service Workflow
Connect Both Ports and Compare Conditions
Choose the Test Path
Confirm the system, medium, expected range and required operating condition before selecting an adapter.
Connect Safely
Depressurize when required and install the correctly rated fitting, hose and sensor without forcing threads.
Set the Condition
Start or operate the system only as the vehicle procedure directs and watch for leaks at every connection.
Capture the Reading
Record the value, unit and operating condition; repeat the observation when the procedure calls for a comparison or decay period.
Depressurize and Confirm
Return the system to a safe state, remove the adapter, restore the connection and confirm the next diagnostic step against the vehicle specification.
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.
Model Comparison
Choose the Right Pressure Test Kit
Model Guide
Choose one or more models. PT520 is selected by default.
| Product Model | PT503 | PT520 | PT530 | PT660 |
|---|---|---|---|---|
| Pressure Measurement & Display | ||||
| Display Screen | 1.8-inch | 2.8-inch | 2.8-inch | 3-inch |
| Pressure Range | -101~200Kpa | -100~200Kpa | -100~300Kpa | 0–210 bar |
| Measurement Accuracy | ±0.5%Fs | ±0.3%FS | ±0.25%FS | ±1%FS |
| Resolution | 0.1kPa | 1hpa, 0.1Kpa | 1hpa, 0.1Kpa | 0.1bar |
| Backlit Display Screen | ✓ | ✓ | ✓ | ✓ |
| Dual-Channel Pressure Testing | Simultaneously Measure the Pressure at Two Different Locations | Simultaneously Measure the Pressure at Two Different Locations | Simultaneously Measure the Pressure at Two Different Locations | Two brake positions/calipers via L/R channels |
| Multi-Parameter Display | Positive Pressure Value Negative Pressure Value | Positive Pressure Value Negative Pressure Value | Positive Pressure Value Negative Pressure Value | Left/right real-time pressure, minimum, maximum, and front/rear pressure difference |
| Pressure Units | psi inHg Kpa mbar bar mmHg | Kpa hPa Torr mbar inHg mmHg inH2O mmH2O psi kg/cm2 | Kpa hPa Torr mbar inHg mmHg inH2O mmH2O psi kg/cm2 | psi / bar / kg/cm² |
| Data Controls & Equipment | ||||
| Data Storage | × | 29 Sets | 29 Sets | Locks the current reading; check the current specification for multi-record storage. |
| Button Light Design | × | × | ✓ | ✓ |
| Magnetic Design on the Back | × | × | ✓ | ✓ |
| Flashlight Function | × | ✓ | ✓ | ✓ |
| Data Lock/Clear/Record | Data Lock | ✓ | ✓ | ✓ |
| Connections & Applications | ||||
| Accessory Connectors | 7 Types | 7 Types | 7 Types | Check the selected package contents for included adapter types and quantities. |
| Equipped Toolbox | × | × | ✓ | ✓ |
| Applicable Scenarios | Intake Manifold Brake Booster Crankcase (Non-corrosive Oil, Water, Air, Natural Gas) | Intake Manifold Brake Booster Crankcase (Non-corrosive Oil, Water, Air, Natural Gas) | Intake Manifold Brake Booster Crankcase (Non-corrosive Oil, Water, Air, Natural Gas) | Internal brake-system fluid pressure; two-position/caliper comparison |
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.
Gregary Eliot ✓ Verified Purchase –
If you want to know whether or not there's restriction in your HVAC ducts, your…
If you want to know whether or not there’s restriction in your HVAC ducts, your furnace filter isn’t right for the system; is closing vents to a room creating issues that will damage your HVAC or you aren’t sure whether you need to add makeup air supply to your exhaust fan, this is the tool you’ll need to figure that out. The manometer reads differences in air pressure between separate points in your HVAC system or the difference between ambient air pressure and another source of air pressure. Generally speaking, if the difference between two points in your HVAC system is greater than .5 inches of water column, you may have a restriction that could cause premature wear of the components and indicate problems with your HVAC. This manometer comes with a small selection of adapters, very brief instructions in the manual and several different lengths and types of hoses. The included long hose is sufficient for most purposes, and the meter has a clear backlit display that is easy to read. it is easy to zero the meter and it will take a sample over time to allow you to take measurements as you cycle through different system functions. It can switch between several units of measure, and appears to be well made with large buttons that are easy to push even while wearing gloves. It does not appear to be safe to use in explosive or flammable environments, and I would not attempt to use it in the presence of flammable vapors or gases. It doesn’t come with batteries or a carrying case, but given the quality of case that these things seem to come with, you’re better off buying something better made for your purposes. All in all, it appears to be a solid meter for the price.
Cedric Antonia ✓ Verified Purchase –
I love the build quality on this and how crisp the display is.
I love the build quality on this and how crisp the display is. The included accessories also cover most of the bases for hooking up to pretty much anything I could hope to measure with this. I compared readings against a cheaper digital manometer I picked up used somewhere and they seem to be agreeing pretty closely. Response time is good, and the data logging feature is a welcome bonus if I want to try to record some sort of system response down the line.
For the super nerdy among us I found there are some serial communication pads exposed though the battery compartment.
Overall a very capable tool!
Kyle Spiga ✓ Verified Purchase –
Great tool for the workshop!
I really like that it supports multiple measurement units (Kpa, psi, inHg, etc.), which makes it very flexible to use. I’ve tested it on the intake manifold vacuum, brake booster pressure, and even crankcase pressure without any issues. The included adapters fit different pipe sizes perfectly, so it’s ready for a wide range of automotive applications. Definitely a must-have for anyone working on cars.