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 PT502
Product Overview
The AUTOOL PT502 is a digital vacuum pressure gauge designed for automotive negative-pressure diagnosis. With a measurement range of -101kPa to 0kPa and ±1%FS accuracy, it helps technicians measure vacuum pressure in key systems such as the engine intake manifold, crankcase, EGR / exhaust valve, exhaust system, turbocharger vacuum line, and A/C ventilation system. By monitoring pressure data, PT502 helps locate engine sealing problems, pipeline leaks, system blockages, and concealed vacuum-related faults more efficiently.
-101–0kPa±1%FS12V Vehicle PowerNegative Pressure Only
DC 10–14VPower Supply
<35mAWorking Current
-10°C–60°CWorking Temp
3 YearsWarranty
Click to enlarge
Key Features
Key Features
PT502 combines a high-precision pressure sensor, smart temperature compensation, direct vehicle power, and reverse polarity protection for reliable vacuum-pressure diagnosis in automotive repair work.
High-Precision Sensor
The built-in high-precision pressure sensor quickly captures pressure changes and provides real-time measurement results across the -101kPa to 0kPa working range with ±1%FS accuracy.
Smart Temperature Compensation
The built-in temperature sensor monitors ambient temperature changes and automatically corrects measurement deviations, improving stability in -10°C to 60°C environments.
Direct Vehicle Power Supply
PT502 connects directly to the vehicle’s 12V power supply, providing worry-free power for continuous diagnosis without a separate internal battery.
Reverse Polarity Protection
If the positive and negative terminals are connected incorrectly, reverse polarity protection automatically cuts off current to help safeguard the gauge and vehicle battery.
Vacuum Fault Diagnosis
Pressure data helps identify sealing issues, pipeline leak points, system blockages, and hidden vacuum faults in multiple automotive systems.
Three-Year Warranty
For eligible non-human damage cases, AUTOOL provides 3-year warranty support and long-term maintenance assistance.
Click to enlargeClick to enlargeClick to enlargeClick to enlarge
Click to enlarge
Applications
Applications
Use PT502 for negative-pressure diagnosis in key automotive systems where vacuum data helps reveal leaks, blockage, sealing failure, or abnormal pressure behavior.
Intake Manifold
Check intake manifold vacuum conditions during engine diagnosis.
Brake Pump / Brake Booster
Assist vacuum-related checks around brake assistance systems.
Exhaust Pipe
Support exhaust-system vacuum-related fault inspection.
Exhaust Valve / EGR Valve
Help diagnose valve-related vacuum pressure abnormalities.
Crankcase
Measure crankcase ventilation vacuum for hidden fault diagnosis.
Gas Pipeline / Vacuum Hose
Locate pipeline leak points, sealing problems, and blockage symptoms.
A/C Ventilation System
Assist ventilation-system vacuum checks where negative pressure measurement is required.
Specifications
PT502 Specifications
Confirm the measurement range, accuracy, voltage, current, temperature range, cable length, and negative-pressure-only limitation before use.
Measurement
Product
AUTOOL PT502 Vacuum Pressure Gauge
Pressure Type
Negative pressure only
Pressure Measurement
-101kPa to 0kPa
Accuracy
±1%FS
Measurement Unit
kPa
Power And Environment
Operating Voltage
DC 10V–14V
Operating Current
<35mA
Operating Temperature
-10°C to 60°C
Power Supply
Direct vehicle power supply
Protection
Reverse polarity protection
Cable And Size
Main Cable Length
1.5m
Probe / Hose Length
0.4m
Body Size Reference
102mm × 48mm
Support
3-year warranty for eligible non-human damage cases
Click to enlarge
Measurement
ProductAUTOOL PT502 Vacuum Pressure Gauge
Pressure TypeNegative pressure only
Pressure Measurement-101kPa to 0kPa
Accuracy±1%FS
Measurement UnitkPa
Power And Environment
Operating VoltageDC 10V–14V
Operating Current<35mA
Operating Temperature-10°C to 60°C
Power SupplyDirect vehicle power supply
ProtectionReverse polarity protection
Cable And Size
Main Cable Length1.5m
Probe / Hose Length0.4m
Body Size Reference102mm × 48mm
Support3-year warranty for eligible non-human damage cases
Before You Order And Use
Before You Order And Use
PT502 is a negative-pressure-only diagnostic gauge. Review the zeroing and pressure-use limitations before testing.
Negative Pressure Only
PT502 only supports negative pressure / vacuum pressure measurement. Do not use it for positive pressure testing.
Do Not Power On Under Pressure
Do not turn on the vacuum pressure gauge while pressure is already applied. Powering on under pressure may affect zeroing and measurement accuracy.
Connect 12V Power Correctly
Connect the clamps correctly to the vehicle DC 10V–14V power supply. Reverse polarity protection helps protect the device, but correct connection is still required.
Confirm The Target System
Before testing, confirm that the target system is a vacuum / negative pressure system and that PT502’s -101kPa to 0kPa range is suitable.
Manual And Downloads
Manual And Downloads
Download the PT502 manual for setup, 12V power connection, negative pressure measurement, zeroing notes, and safe-use instructions.
Click to enlarge
AUTOOL PT502 Manual EN-DE
Open the PDF manual for PT502 connection, measurement, and safe-use guidance.
Contact AUTOOL Store before ordering if you need help confirming the manual version, setup steps, compatibility, accessories, safe-use notes, or after-sales support for this product.
Compare related AUTOOL pressure testing tools before choosing the right gauge for vacuum pressure, differential pressure, brake pressure, oil pressure, or cylinder pressure diagnosis.
SALE
Select options
This product has multiple variants. The options may be chosen on the product page
Select options
This product has multiple variants. The options may be chosen on the product page
Click to enlarge
What Is In The Box
What Is In The Box
Review the package image to confirm the PT502 gauge, power connection, pressure interface, packaging, and manual before ordering.
Main UnitAUTOOL PT502 Vacuum Pressure Gauge
Power ClampsVehicle battery clamp power cable
Pressure InterfaceVacuum pressure measurement probe / interface shown in the package image
PackagingProduct box shown in the package image
DocumentationPT502 user manual shown in the package image
Questions And Answers
These answers cover negative-pressure-only use, measurement range, power-on precautions, applications, 12V power, reverse polarity protection, accuracy, and temperature compensation.
No. PT502 only supports negative pressure / vacuum pressure measurement. Do not use it for positive pressure testing.
PT502 measures vacuum pressure from -101kPa to 0kPa.
Powering on while pressure is already applied may affect zeroing and cause inaccurate measurement results. Power on the gauge before applying vacuum pressure.
PT502 can be used for vacuum-related diagnosis in the intake manifold, crankcase, EGR / exhaust valve, exhaust pipe, gas pipeline, turbocharger vacuum line, and A/C ventilation system.
PT502 connects directly to the vehicle DC 10V–14V power supply using the battery clamps.
Yes. PT502 has reverse polarity protection that cuts off current when the positive and negative terminals are connected incorrectly.
The measurement accuracy is ±1%FS across the working range.
Yes. PT502 has a built-in temperature sensor and smart temperature compensation to reduce measurement deviation caused by ambient temperature changes.
Warranty And Contact
Warranty And Contact
For PT502 product support, application confirmation, manual requests, negative-pressure-only confirmation, measurement accuracy, zeroing support, power clamp connection, or reverse polarity protection questions, contact AUTOOL Store directly.
Pre-Sales And Product Support
Use support if you need help confirming whether PT502 is suitable for your vacuum-pressure test scenario, whether your target system is negative pressure, how to connect DC 10V–14V power, or how to avoid power-on-under-pressure measurement issues.
3-year warranty for eligible non-human damage cases
Click to enlarge
Click to enlarge
Click to enlarge
Click to enlarge
Click to enlarge
Click to enlarge
Click to enlarge
Click to enlarge
Click to enlarge
No reviews yetBe the first to share your experience with this product.