Principle:
The Antifreeze Freezing Point Tester is a precision optical instrument for measuring the freezing point of antifreeze. The basic principle is to apply the total reflection critical angle method to measure the refractive index of a solution, which in turn calibrates the concentration of the liquid measured and its properties.

Specifications:
▶ Name: Handheld refractometer, freezing point meter, urea concentration meter
▶ Measurement items: Glass water/urea/electrolyte/antifreeze freezing point measurement
● Urea concentration: Measuring range (30-35%)/Divisional value (0.2%)/Accuracy (±0.2%)
● Antifreeze freezing point: Measuring range (-50~0℃)/Divisional value (1℃)/Accuracy (±0.5℃)
● Specific gravity of battery fluid: Measuring range (1.10~1.40)/Divisional value (0.01)/Accuracy (±0.01)
● Glass cleaner: Measuring range (-40~0℃)/Divisional value (5℃)/Accuracy (±5℃)

Usage:
The measured results can be used to know the freezing point of ethylene glycol and propylene glycol based antifreeze systems and the freezing point of car front window cleaning fluids; it can also be used to detect the specific gravity of the electrolyte in lead-acid batteries and the state of use, with a built-in temperature compensation device to ensure accurate measurement at ambient temperatures from 10°C to 30°C, with a clear scale and high accuracy.

Package lists:
1 * Refractometer
1 * Dropper
1 * Screwdriver
1 * Flannel
1 * English instruction manual

Please note:
1. Picture data are manual measurement, there may be 1-3mm error, please prevail in kind
2. Multifunctional freezing point meter cannot measure the freezing point of methanol antifreeze and methanol glass water
3. After use, it is strictly forbidden to put it directly into water for cleaning, it should be wiped with a clean soft cloth and the optical surface should not be touched or scratched.
4. The instrument should be stored in a dry, non-corrosive place