AUTOOL AS509 Automotive Coolant Boiling Point Tester
US$79.00
- Coolant Boiling-Point Test
- Ethylene / Propylene Glycol + Water
- Normal + 23-Brand Modes
- 20–40 Second Results
- Coolant Boiling-Point Test: Measure the boiling point of a prepared coolant sample for comparison with the applicable service reference.
- Ethylene / Propylene Glycol + Water: Test ethylene glycol, propylene glycol, or water coolant using the external 12 V supply.
- Normal + 23-Brand Modes: Choose general testing or compare the result with built-in references for 23 coolant brands.
- 20–40 Second Results: View the test result in approximately 20–40 seconds.
- 1.6-Inch OLED: Read results on the self-illuminating OLED in bright or dim service areas.
- Coolant Boiling-Point Test: Measure the boiling point of a prepared coolant sample for comparison with the applicable service reference.
- Ethylene / Propylene Glycol + Water: Test ethylene glycol, propylene glycol, or water coolant using the external 12 V supply.
- Normal + 23-Brand Modes: Choose general testing or compare the result with built-in references for 23 coolant brands.
- 20–40 Second Results: View the test result in approximately 20–40 seconds.
- 1.6-Inch OLED: Read results on the self-illuminating OLED in bright or dim service areas.
- 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 AS509 · Coolant Boiling-Point Tester
Check Coolant Boiling Point Against the Right Reference
Measure the boiling point of a prepared coolant sample and compare it with the applicable service reference. AS509 supports ethylene glycol, propylene glycol, and water coolants, with a general mode or built-in references for 23 listed brands. The OLED shows the result in approximately 20–40 seconds.
- Prepared-Sample Boiling Point
- Ethylene / Propylene Glycol / Water
- General / 23-Brand References
- About 20–40-Second Test
- External 12 V Power
Key Features
Coolant Boiling Point Tester with Normal and Brand Modes
High-Sensitivity Sensor
With temperature measurement accuracy of ±3%, AS509 tests coolant sample boiling point and tracks temperature changes during coolant condition checks.
Dual Mode Selection
Normal Mode supports daily general tests across vehicle models and coolant types. Brand Mode uses built-in brand data to perform reference-based testing for more accurate judgment.
Supports 23 Coolant Brands
Brand Mode covers 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, and TOYOTA.
Built-In Reference Values
Compare the measured boiling point with the selected built-in reference after confirming the coolant identity.
1.6-Inch HD OLED Display
The self-illuminating OLED screen makes test results clear and intuitive, helping users read the result in bright light, dim workshops, or night-time conditions.
Dual Safety Protection
Built-in reverse polarity protection and overheat protection help reduce operational errors, connection mistakes, and overheating risks during testing.
Coolant Type Coverage
AS509 tests ethylene glycol, propylene glycol and water coolant types using an external 12V battery supply.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Connect, Sample, Heat and Compare
Draw Coolant Sample
Use the sampler to draw 50ml of coolant from the vehicle reservoir, then inject the sample into the beaker.
Connect 12V Power
Connect the AS509 to a 12V battery, turn on the tester, and select the coolant type or Brand Mode according to your test target.
Insert Test Rod
Place the test rod into the beaker and make sure the sampling hole is fully submerged in the coolant sample.
Start Test
Hold the “S” button, wait for the progress bar to complete, then read the boiling point result on the OLED display.
Clamp-Powered Sample Test
Connect the power clamps to a 12V battery and immerse the test rod in the coolant sample. Use the screen and buttons to select the test mode and start measurement.
Safe Use
Control Coolant Type, Heat and Sample Handling
Use the Boiling-Point Result
Use the listed coolant type, sample method and temperature conditions. The open-sample boiling result is not the protection temperature of a pressurized cooling system and does not report freeze point, pH or inhibitor reserve.
Model Comparison
Choose the Right Fluid Test Method
Model Guide
Choose one or more models. AS509 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 AS509 User Manual
Open the PDF manual for AUTOOL AS509 coolant type selection, sensor testing, built-in reference values, result interpretation, dual safety protection and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL AS509 Coolant Boiling Point Tester
- Carrying CaseProtective storage case
- Sampling ToolsBeaker, syringe, and tube
- ItemPower 12V battery clamps and power cable
- DocumentationUser manual
- PackageRetail box
Buyer Questions
Fluid Fit, Method and Result Questions
What Coolant Types Can AS509 Test?
AS509 is compatible with Ethylene Glycol, Propylene Glycol, and Water coolant types. It is designed to measure coolant boiling point and provide one input for the applicable coolant and vehicle service decision.
What Is The Difference Between Normal Mode And Brand Mode?
Normal Mode is for daily general testing and can directly measure the actual boiling point of coolant across vehicle models and coolant types. Brand Mode uses built-in data for 23 popular coolant brands and compares results with brand reference values for more accurate judgment.
How Much Coolant Sample Is Needed?
Use a sampler to draw 50ml of coolant from the vehicle reservoir, then inject it into the beaker for testing.
Does AS509 Need A 12V Battery?
Yes. AS509 uses 12V external battery power through power clamps. Its operating voltage range is 10-14V.
What Brands Are Supported In Brand Mode?
Brand Mode supports 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, and TOYOTA.
What Does The Boiling Point Reference Value Mean?
After confirming coolant identity, compare the measured boiling point with the built-in reference and the vehicle service criteria to plan the next step.
How Long Does One Test Take?
The AS509 testing time is approximately 20-40 seconds, depending on the test condition and coolant sample.
What Safety Protection Does AS509 Include?
AS509 includes reverse polarity protection and overheat protection to reduce operational error and overheating risks during coolant boiling point testing.
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