{"id":63535,"date":"2026-01-26T10:15:05","date_gmt":"2026-01-26T10:15:05","guid":{"rendered":"https:\/\/shop.autooltech.com\/?post_type=product&p=63535"},"modified":"2026-05-15T06:42:02","modified_gmt":"2026-05-15T13:42:02","slug":"autool-as509-coolant-boiling-pointtester","status":"publish","type":"product","link":"https:\/\/autoolstore.com\/da\/product\/autool-as509-coolant-boiling-pointtester\/","title":{"rendered":"AUTOOL AS509 Coolant Boiling Point Tester"},"content":{"rendered":"
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AUTOOL AS509<\/div>\n

Product Overview<\/h2>\n

The AUTOOL AS509 Automotive Coolant Boiling Point Tester is a handheld vehicle diagnostic device that determines whether coolant replacement is needed by measuring the coolant boiling point. It supports Normal Mode for general testing and Brand Mode for reference-based testing across 23 popular coolant brands, helping technicians quickly compare measured boiling point results with built-in manufacturer reference values.<\/p>\n

\n Coolant Boiling Point<\/span>\n Normal \/ Brand Mode<\/span>\n 23 Coolant Brands<\/span>\n 12V Power<\/span>\n <\/div>\n
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\u00b13%<\/span>Accuracy<\/span><\/div>\n
20-40s<\/span>Testing Time<\/span><\/div>\n
10-14V<\/span>Operating Voltage<\/span><\/div>\n
3 Years<\/span>Warranty<\/span><\/div>\n <\/div>\n <\/div>\n
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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n
\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n <\/div>\n <\/div>\n <\/section>\n\n
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Key Features<\/div>\n

Key Features<\/h2>\n

AS509 combines a high-sensitivity sensor, dual test modes, 23 coolant brand data, OLED display, built-in reference values, and dual safety protection to help users judge coolant condition more confidently.<\/p>\n <\/div>\n

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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n

High-Sensitivity Sensor<\/h3>\n

With temperature measurement accuracy of \u00b13%, AS509 can accurately test coolant boiling point and assess temperature changes during coolant condition checks.<\/p>\n <\/article>\n

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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n

Dual Mode Selection<\/h3>\n

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.<\/p>\n <\/article>\n

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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n

Supports 23 Coolant Brands<\/h3>\n

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.<\/p>\n <\/article>\n

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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n

Built-In Reference Values<\/h3>\n

No need to manually check standard values. Compare the measured boiling point with the built-in manufacturer reference values to quickly judge whether the coolant has deteriorated.<\/p>\n <\/article>\n

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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n

1.6-Inch HD OLED Display<\/h3>\n

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.<\/p>\n <\/article>\n

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\"AUTOOL\n Click to enlarge<\/span>\n <\/figure>\n

Dual Safety Protection<\/h3>\n

Built-in reverse polarity protection and overheat protection help reduce operational errors, connection mistakes, and overheating risks during testing.<\/p>\n <\/article>\n <\/div>\n <\/section>\n\n

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How To Use<\/div>\n

How To Use<\/h2>\n

AS509 uses a coolant sample, 12V battery power, test rod immersion, and one-button test operation to measure the coolant boiling point in approximately 20-40 seconds.<\/p>\n <\/div>\n

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Draw Coolant Sample<\/h3>

Use the sampler to draw 50ml of coolant from the vehicle reservoir, then inject the sample into the beaker.<\/p><\/article>\n

Connect 12V Power<\/h3>

Connect the AS509 to a 12V battery, turn on the tester, and select the coolant type or Brand Mode according to your test target.<\/p><\/article>\n

Insert Test Rod<\/h3>

Place the test rod into the beaker and make sure the sampling hole is fully submerged in the coolant sample.<\/p><\/article>\n

Start Test<\/h3>

Hold the \u201cS\u201d button, wait for the progress bar to complete, then read the boiling point result on the OLED display.<\/p><\/article>\n <\/div>\n <\/div>\n

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Use Notes<\/h3>\n