AUTOOL AS509 Coolant Boiling Point Tester

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. 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. 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. Confirm the operating voltage, test time, coolant compatibility, boiling point range, cable length, display, and main part layout before use. Use the AS series comparison to choose the right AUTOOL fluid analyzer for brake fluid, engine oil, transmission fluid, power steering fluid, or coolant condition testing. Key features • Boiling Point Decision: Measures coolant boiling point so technicians can judge whether replacement is needed. • 23-Brand Coolant Mode: Built-in data for 23 coolant brands supports more targeted checks without looking up separate reference tables. • Safe Clear Display: The HD OLED screen plus reverse-polarity and overheat protection help make readings easier and operation safer. • Product: AUTOOL AS509 Automotive Coolant Boiling Point Tester • Test Purpose: Measure coolant boiling point and help determine whether coolant replacement is needed • Test Modes: Normal Mode and Brand Mode