AUTOOL PT502 · -101–0 kPa Vacuum Gauge
Watch Vacuum Patterns Under Controlled Conditions
Observe negative-pressure patterns on automotive vacuum paths with this automotive vacuum tester and compare readings under controlled operating conditions. PT502 covers -101 to 0 kPa with ±1% FS accuracy, adds temperature compensation for changing workshop conditions, and runs directly from 12 V vehicle power for continuous workshop observation.
- -101 To 0 kPa Vacuum Range
- Stated ±1% FS Accuracy
- -10°C To 60°C Compensation
- Direct 12 V Vehicle Power
- 1.5 m Main Cable
Key Features
Live Negative-Pressure and Temperature Readout
Stated ±1% FS Accuracy
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
Follow the vacuum pattern at the selected connection to identify deviations that need further inspection, comparing readings under the same recorded engine conditions.
Main Cable Length
The main cable is 1.5 m long.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Safe Use
Match the Path, Adapter and Operating State
Vacuum Measurement Range
Vacuum range: -101 to 0 kPa. Choose a positive-pressure gauge for boost 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.
Use the Results to Plan the Next Check
Use PT502 within its -101 to 0 kPa vacuum range and compare the pattern with the vehicle specification and operating condition to guide follow-up inspection.
Specifications
Vacuum Range and Gauge Specifications
| Specification | Value |
|---|---|
| Gauge-pressure range | -101 to 0 kPa |
| Stated accuracy | ±1% FS |
| Power supply | 12 V vehicle connection |
Manual & Support
Find the Manual and Adapter Guidance
AUTOOL PT502 User Manual
Open the PDF manual for AUTOOL PT502 vacuum diagnosis, vehicle-power connection, temperature compensation, pressure readings, reverse-polarity protection, safe hose setup and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL PT502 Vacuum Pressure Gauge
- ItemPower Clamps Vehicle battery clamp power cable
- Pressure InterfaceVacuum pressure measurement probe / interface
- PackagingProduct box
- DocumentationPT502 user manual
Buyer Questions
Pressure Connection and Reading Questions
Can PT502 Measure Positive Pressure?
No. PT502 only supports negative pressure / vacuum pressure measurement. Do not use it for positive pressure testing.
What Is The Measurement Range Of PT502?
PT502 measures vacuum pressure from -101kPa to 0kPa.
Why Should I Not Power On The Gauge Under Pressure?
Powering on while pressure is already applied may affect zeroing and cause inaccurate measurement results. Power on the gauge before applying vacuum pressure.
What Systems Can PT502 Test?
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.
How Is PT502 Powered?
PT502 connects directly to the vehicle DC 10V–14V power supply using the battery clamps.
Does PT502 Have Reverse Polarity Protection?
Yes. PT502 has reverse polarity protection that cuts off current when the positive and negative terminals are connected incorrectly.
What Is The Accuracy Of PT502?
The measurement accuracy is ±1%FS across the working range.
Does PT502 Support Temperature Compensation?
Yes. PT502 has a built-in temperature sensor and smart temperature compensation to reduce measurement deviation caused by ambient temperature changes.
