Check Coolant Boiling Point Against the Right Reference
The AS509 heats a 50 ml coolant sample and shows its boiling point on an OLED screen, either as a general reading or against built-in references for 23 coolant brands. It is powered from a 12 V vehicle battery through clamps.
- 23 Brand Reference Modes
- 20–40 s Test
- ±3% Temperature Accuracy
- 12 V Battery Powered
Key Features
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Normal and Brand Modes
Normal Mode measures the actual boiling point for everyday checks across vehicles and coolant types; Brand Mode compares the result with built-in brand reference values.
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23 Coolant Brands
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.
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Three Coolant Types
Tests ethylene glycol, propylene glycol and water-based coolant.
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Readable OLED Screen
The self-illuminating display stays clear in bright light, dim workshops or at night.
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Dual Safety Protection
Reverse polarity and overheat protection reduce connection mistakes and overheating risk.
More Specifications
| Sample volume | 50 ml |
|---|---|
| Temperature units | °C / °F |
| Detection method | Sample heating |
What’s in the Box
- AS509 coolant boiling point tester
- Carrying case
- Beakers, syringe and tube
- 12 V battery clamps and power cable
- User manual
- Retail box
How to Use
- Draw a sampleUse the syringe to draw 50 ml of coolant from the reservoir and inject it into the beaker.
- Connect 12 V powerClamp the tester to a 12 V battery, switch on and select the coolant type or Brand Mode.
- Insert the test rodPlace the rod in the beaker with the sampling hole fully submerged.
- Start the testHold the “S” button, wait for the progress bar and read the boiling point on the display.
Coolant selection, reference values and troubleshooting: AS509 user manual (PDF).
Good to Know
Care
- An open-sample boiling point is not the protection temperature of a pressurized cooling system, and the AS509 does not report freeze point, pH or inhibitor reserve.
- Confirm the coolant identity before comparing with a brand reference.
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