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Autool  |  SKU: AS506

Autool AS506 | Brake Fluid Tester

€89,95 incl.
€74,34 excl.

Warranty directly via AsTools

We handle warranty cases ourselves, quickly and without involving the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually assist you immediately. Only in exceptional cases do we still send the product to the supplier.

2 years warranty on all products

All our products come with a 2-year factory warranty. This ensures you long-lasting quality and service.

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The Autool AS506 is a professional brake fluid tester that measures the actual boiling point of brake fluid instead of just estimating the water content. The device heats a fluid sample via the integrated probe and continuously records the temperature until the boiling point is reached. Because moisture in brake fluid directly lowers the boiling point — increasing the risk of vapor lock during intensive braking — this measurement method provides the most reliable indication of the fluid’s actual condition.

The AS506 has two test modes. In normal mode, the device tests nine fluid types: DOT 3, DOT 4, DOT 4+, DOT 4 ESP, DOT 5, DOT 5.1, DOT 5.1 ESP, ENV4, and ENV6. In brand mode, the device directly compares the measurement with factory values of fourteen brake fluid brands, including ATE, TRW, Bosch, Motul, Brembo, Textar, and Ferodo. The result appears within about 16 seconds on the illuminated LCD screen, along with the official dry and wet boiling point values for reference.

ADVANTAGES

✔Measures the actual boiling point (0-320 °C) — more accurate than testers that only measure water content or conductivity.
✔Two test modes: 9 fluid types in normal mode and 14 brake fluid brands in brand mode for direct factory comparison.
✔Test result in about 16 seconds, including official dry and wet boiling point values for reference.
✔Automatic Overheat Protection: heating stops once the temperature reaches about 10 °C above the dry boiling point.

IMPORTANT NOTES

✕Requires an external 12V power source (vehicle battery); the device has no internal battery.
✕For the test, a sample of 40-50 ml brake fluid must be taken from the reservoir; testing cannot be done directly in the vehicle.
✕The probe gets hot during measurement; wear safety goggles and allow the device to cool before storing.

Applications and Features

  • Boiling Point Measurement: Heats the fluid sample via the probe and records the actual boiling point within a measurement range of 0 to 320 °C.
  • Condition assessment: Compares the measured boiling point with international standard values (dry/wet), so it is immediately clear whether the brake fluid needs to be replaced.
  • Brand mode: Matches the measurement with factory values of 14 common brands, including ATE, TRW, Bosch, Mobil, Total, Fuchs, Motul, Delphi, Ferodo, Brembo, and Textar.
  • Maintenance advice: Supports workshops in justifying brake fluid replacement to customers with an objective measurement value instead of an indicator light.

Use in four steps

  1. Take sample: Use the sampler to draw 40-50 ml of brake fluid from the reservoir and pour it into the measuring cup.
  2. Connect and set up: Connect the device to a 12V battery, turn it on, and select the fluid type or brand.
  3. Place probe: Insert the measuring probe into the cup and ensure the measuring opening is fully submerged in the fluid.
  4. Start test: Hold the S button for about 16 seconds; after the progress bar fills, the measured boiling point will appear on the screen.

Package Contents

  • 1x Autool AS506 brake fluid tester with measuring probe
  • 1x Measuring cup
  • 1x Sampler (pipette)
  • 1x Power cable with battery clamps
  • 1x Manual
  • 1x Storage case
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Good to know: Brake fluid is hygroscopic and continuously absorbs moisture from the air. A new DOT 4 fluid has a boiling point of about 230 °C, but with 3-4% moisture it already drops toward the wet boiling point of 155 °C. Therefore, test at every major maintenance — and clean the probe immediately after use to prevent measurement errors in the next test.

Technical specifications

Specification Description
Product brand Autool
Product model AS506
Tester type Brake fluid boiling point tester
Measuring principle Heating via measuring probe with continuous temperature recording
Measuring range 0 to 320 °C
Test duration Approximately 16 seconds
Supported fluid types DOT 3, DOT 4, DOT 4+, DOT 4 ESP, DOT 5, DOT 5.1, DOT 5.1 ESP, ENV4, ENV6
Brand mode 14 brands, including ATE, TRW, Bosch, Mobil, Total, Fuchs, Motul, Delphi, Ferodo, Brembo, Textar
Required sample 40-50 ml
Power supply 12V (vehicle battery, via battery clamps)
Display LCD with backlight
Protection Automatic overheating protection (approx. 10 °C above dry boiling point)
Certification CE (EMC 2014/30/EU, RoHS 2011/65/EU)