AUTOOL AS506 Brake Fluid Boiling Point Tester
US$72.00
- Heated Boiling-Point Test
- DOT3 / DOT4 / DOT5.1
- Normal + 14-Brand Modes
- About 16 Seconds
- Heated Boiling-Point Test: Heat a prepared brake-fluid sample and report its boiling point for comparison with the applicable service reference.
- DOT3 / DOT4 / DOT5.1: Select a test mode for DOT3, DOT4, or DOT5.1 brake fluid.
- Normal + 14-Brand Modes: Choose a general fluid-type test or one of 14 supported brand references.
- About 16 Seconds: Follow live temperature and progress on the OLED during the approximately 16-second test cycle.
- Reusable Test Hardware: Run repeated sample tests without disposable test strips, using an external 12 V battery supply.
- Heated Boiling-Point Test: Heat a prepared brake-fluid sample and report its boiling point for comparison with the applicable service reference.
- DOT3 / DOT4 / DOT5.1: Select a test mode for DOT3, DOT4, or DOT5.1 brake fluid.
- Normal + 14-Brand Modes: Choose a general fluid-type test or one of 14 supported brand references.
- About 16 Seconds: Follow live temperature and progress on the OLED during the approximately 16-second test cycle.
- Reusable Test Hardware: Run repeated sample tests without disposable test strips, using an external 12 V battery supply.
- 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 AS506 · Heated Brake Fluid Boiling Point Tester
Measure a Prepared Sample’s Boiling Point
Measure the boiling point of a prepared brake-fluid sample for comparison with the applicable service reference. AS506 supports DOT3, DOT4, and DOT5.1 modes plus general or 14-brand reference paths, showing live temperature and progress during the approximately 16-second heated test. Reusable hardware avoids disposable test strips.
- DOT 3 / 4 / 5.1 Test Modes
- Prepared-Sample Boiling Point
- General / 14-Brand References
- About 16-Second Heated Test
- External 12 V Power
Key Features
Heated Sample Test with Fluid Modes
Dual Mode Selection
Use Normal Mode for general brake fluid type selection or Brand Mode when you want to reference one of the supported common brake fluid brands.
16-Second Fast Detection
Press and hold the S button for about 16 seconds. The tester displays live fluid temperature and completes the result after the progress bar finishes.
Boiling Point Measurement
AS506 quickly obtains the minimum boiling point of brake fluid and provides official dry and wet boiling point values for reference.
Wide Brake Fluid Coverage
Select only the DOT3, DOT4 or DOT5.1 operating mode specified for the current procedure.
Clear OLED Interface
The screen prompts mode selection, brake fluid type, voltage, test status, live temperature, and final test result for easier operation.
No Consumable Test Sticks
The tester does not require consumable test sticks for routine testing, helping reduce repeated testing costs when maintained correctly.
Reverse Polarity Protection
Battery polarity reverse protection helps reduce risk during 12V battery connection, but users should still connect red to positive and black to negative.
12V Battery Connection
The tester uses an external 12V battery supply for brake fluid boiling point measurement.
Boiling-Point Reference Values
Reference boiling points: DOT3 — dry 205°C / 401°F, wet 140°C / 284°F; DOT4 / DOT4+ — dry 230°C / 446°F, wet 155°C / 311°F; DOT5 — dry 260°C / 500°F, wet 180°C / 356°F; DOT5.1 — dry 270°C / 518°F, wet 190°C / 374°F. DOT5 is a reference value only; selectable operating modes are DOT3, DOT4 and DOT5.1.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Prepare, Heat, Read and Clean
Collect Brake Fluid
Use the injection sampler to suck up brake fluid and fill the beaker. Keep the sample above the 40ml scale and not more than 50ml.
Connect 12V Battery Power
Connect the red clamp to battery positive and the black clamp to battery negative. The tester powers on automatically after correct connection.
Select Mode And Fluid Type
Select Normal Mode or Brand Mode, then choose the brand and brake fluid type such as DOT3, DOT4 or DOT5.1.
Immerse The Test Stick
Put the test stick into the beaker and make sure the sampling hole is immersed in the brake fluid. Bleed air bubbles from the test head cavity before testing.
Press And Hold S For 16s
After entering the ready interface, press and hold the S button for about 16 seconds. Wait until the progress bar is complete to obtain the result.
Sample-Based Testing
Collect a brake fluid sample, connect the tester to a 12V battery and immerse the test rod before starting the test. Follow the operation instructions for handling the heated sample.
Safe Use
Control Sample Type, Heat and Handling
Supported Brake Fluid Types
Operating selections: DOT3, DOT4 and DOT5.1. Match the mode to the fluid and procedure before heating the sample.
Normal Mode
Use Normal Mode when you want to select the brake fluid type directly, such as DOT3, DOT4 or DOT5.1.
Brand Mode
Use Brand Mode when testing by built-in brand reference. Select the brand and corresponding brake fluid type before testing.
14 Brand References
Brand Mode covers ATE, TRW, BOSCH, MOBIL, TOTAL, FUCHS, MOTUL, DELPHI, KUNLUN, FERODO, BREMBO, TEXTAR, MONARCH, and CHANGCHENG.
Use 12V Battery Power
Clamp the tester to a 12V vehicle battery. The working voltage is 12V, with a minimum of 10V. Do not reverse the positive and negative clamps or short-circuit with the vehicle.
Use Enough Brake Fluid
Fill the beaker with more than 40ml and not more than 50ml of brake fluid. Do not test without enough fluid, because empty boiling may damage the test stick.
Wear Eye Protection
Wear goggles and avoid splashing brake fluid into your eyes. Follow the brake fluid manufacturer’s safety data sheet and the vehicle service manual.
Avoid Burns After Testing
The test stick and fluid become hot after the boiling point test. Do not touch them directly after testing.
Do Not Reuse Tested Fluid
Do not pour tested brake fluid back into the reservoir. The fluid structure has been changed by boiling, and reuse may affect driving safety.
Brake Fluid Only
AS506 is designed for brake fluid detection. Do not use it for other liquids or non-automotive purposes.
Clean After Testing
After the brake fluid test, empty the brake fluid and fill about 50ml of water to test and clean residual brake fluid from the test stick.
Long-Term Storage
If the tester is not used for a long time, detect with water so residual corrosive brake fluid can be removed from the test stick, then let the heating stick dry at room temperature.
Quick Calibration Check
Fill the beaker with water and check whether the boiling point reads around 100°C / 212°F ±3%. For stricter calibration, return the unit to the factory for retesting and calibration.
Use the Sample Result
Use the specified sample volume and supported fluid mode, then clean the heated probe as directed. Compare the measured sample result with the applicable service criteria.
Trained Operators Only
Use the tester only by professional technicians or trained service personnel, and keep it away from children and untrained users.
Model Comparison
Choose the Right Fluid Test Method
Model Guide
Choose one or more models. AS506 is selected by default.
| Product name | AS501 Brake Fluid Tester | AS502 Brake Fluid Tester | AS503 Engine Oil Quality Tester | AS505 Transmission Fluid Tester | AS506 Brake Fluid Boiling Point Tester | AS507 Power Steering Fluid Tester | AS509 Coolant Boiling Point Tester |
|---|---|---|---|---|---|---|---|
| Test Method & Application | |||||||
| Detection Technology | Pressure Boost Detection Technology | Water-content screening; no hydraulic pressure generation or measurement | Optical Probe Technology | Optical Probe Technology | Sample Heating Technology | Optical Probe Technology | Sample Heating Technology |
| Operating Principle | Brake Fluid (Water Content) | Brake Fluid (Water Content) | Engine Oil (Transmittance) | Transmission Fluid(Transmittance) | Brake Fluid (Boiling Point) | Steering Fluid (Transmittance) | Coolant |
| Test Mode Selection | Normal Mode | Normal Mode/Expert Mode | Gasoline Engine/Diesel Engine | Automotive Transmission Fluid | Normal Mode/Brand Mode | Automotive Steering Gear | Normal Mode/Brand Mode |
| Boiling Point Reference Value | × | × | × | × | ✓ | × | ✓ |
| Normal Mode | 6 Types ENV-4、ENV-6 DOT3、DOT4、DOT5、DOT5.1 | 3 Types DOT3、DOT4、DOT5.1 | × | × | DOT3, DOT4 and DOT5.1 (procedure-confirmed selections) | × | 23 Coolant Brands For ACDELCO、BASF、BOSCH、CASTROL、ENGINE_ICE、EVANS、FORD、HONDA、JOHN_DEERE、KUNLUN、MOBIL、MOPAR、NISSAN、OMTECH、PEAK、PRESTONE、RECOCHEM、SHELL、SKI-DOO、ZEREX、STAR_BRITE、TOTAL、TOYOTA |
| Measurement & Response | |||||||
| Temperature Unit Switching | × | × | ℃/℉ | ℃/℉ | ℃/℉ | ℃/℉ | ℃/℉ |
| Temperature Measurement Range | × | × | 0-85℃ 0-185℉ | 0-85℃ 0-185℉ | 0-320℃ 0-608℉ | 0-85℃ 0-185℉ | Diluted Coolant Boiling Point Range： 100°C~120°C(212°F~248°F) Original Manufacturer Coolant Boiling Point Reference Range 106°C~191°C(221°F~376°F) |
| Test Duration | 10s Response | 10s Response | 10s Response | 10s Response | 16s Response | 10s Response | 20~40s Response |
| Display, Probe & Power | |||||||
| Backlit Display Screen | 1.8-inch | 2.8-inch | 2.8-inch | 2.8-inch | 1.54-inch | 2.8-inch | 1.6-inch |
| Test Cable Length | 26cm | 26cm | 80cm | 80cm | 4cm | 80cm | 130cm |
| Power Supply Voltage | 3V | 6V | 6V | 6V | 12V | 6V | 10-14V |
| Hose Material | Iron Oxide | 304 Stainless Steel | Teflon | Teflon | × | Teflon | × |
Manual & Support
Find the Manual and Fluid-Test Guidance
AUTOOL AS506 User Manual
Open the PDF manual for AUTOOL AS506 brake-fluid mode selection, boiling-point testing, result interpretation, vehicle-battery connection, reverse-polarity protection and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL AS506 brake fluid boiling point tester with power clamps
- Storage CaseProtective carrying case
- ItemBeakers Brake fluid sample beakers with 50ml scale reference
- Sampling ToolsInjection sampler and hose
- DocumentationAUTOOL AS506 user manual
- Retail BoxAUTOOL AS506 product box and accessories
Buyer Questions
Fluid Fit, Method and Result Questions
What Does AUTOOL AS506 Test?
AS506 reports the boiling point of a prepared brake-fluid sample. Compare that value with the applicable fluid and vehicle service criterion as one maintenance input.
Which Brake Fluid Types Does AS506 Support?
Select the procedure-confirmed DOT3, DOT4 or DOT5.1 operating mode before testing.
What Is The Difference Between Normal Mode And Brand Mode?
Normal Mode lets you select the brake fluid type directly. Brand Mode lets you select from built-in brand references including ATE, TRW, BOSCH, MOBIL, TOTAL, FUCHS, MOTUL, DELPHI, KUNLUN, FERODO, BREMBO, TEXTAR, MONARCH, and CHANGCHENG, then choose the matching brake fluid type.
How Much Brake Fluid Should I Use For One Test?
Use the injection sampler to fill the beaker with brake fluid above the 40ml scale and not more than 50ml. Do not test with insufficient liquid, because empty boiling may damage the test stick.
What Power Supply Does AS506 Need?
- Use 12V vehicle battery power.
- The working voltage is 12V and the minimum voltage is 10V.
- Connect the red clamp to battery positive and the black clamp to battery negative.
- Use AS506 only with the supported 12 V power connection.
How Long Does One Detection Take?
After selecting the correct mode and brake fluid type, press and hold the S button for about 16 seconds. Wait for the progress bar to complete, then read the test result on the OLED screen.
Can I Pour Tested Brake Fluid Back Into The Reservoir?
No. Do not pour the tested brake fluid back into the brake fluid reservoir. The sample has been boiled and its structure has changed, which may affect driving safety.
How Should I Clean Or Maintain The Test Stick?
After testing, empty the brake fluid and fill about 50ml of water to clean residual brake fluid from the test stick. If the tester will not be used for a long time, use water to dilute and remove residual brake fluid, then let the heating stick dry at room temperature.
How Can I Check Whether AS506 Needs Calibration?
Fill the beaker with water and test whether the boiling point reads around 100°C / 212°F ±3%. This is only a quick initial diagnosis. If stricter standards are required, the unit must be returned to the factory for retesting and calibration.
How Is AS506 Different From AS501, AS502, AS503, AS505, And AS507?
- AS501 and AS502 focus on brake fluid water content.
- AS503 tests engine oil quality by transmittance.
- AS505 tests transmission fluid by transmittance.
- AS506 tests brake fluid boiling point using flash point heating technology.
- AS507 tests power steering fluid by transmittance.
What Accessories Are Included?
Package contents: AS506 main tester, carrying case, beakers, injection sampler, hose, user manual, and retail box.
How Long Is The Warranty?
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Schneider Heinz ✓ Verified Purchase –
Top!
Top!
sadwa ✓ Verified Purchase –
perfect
Very good product, very accurate in detecting boiling point
Greatly improved my work efficiency
Rupert Carl ✓ Verified Purchase –
Testing the engine coolant boiling point is essential and this brake fluid…
Testing the engine coolant boiling point is essential and this brake fluid tester is easy to use, easy to read and very useful!