"Product DescriptionFreezing point of glycol antifreeze: -50~0, the division value of 1Freezing point of propylene glycol antifreeze: -50 ~ 0 , the division value of 1 Specific weight of electrolyte: 1.10-1.40, index value 0.01. (1.15 ~ 1.20 need to charge; 1.20 ~ 1.25 enough power; 1.25 ~ 1.30 enough power) Freezing point of glass cleaning fluid. -40 +0 , division value of 5 Contain:1 * reactor1 * screwdriver1 * manual1 * cloth cleaning1. USE : With this refractometer, the concentration of ethylene glycol and propylene glycol of the antifreeze in your car, your solar system, your fuel pumps can be determined. heat, the freezing point of the washer fluid, the heating system or other machines or systems can be determined2. MEASUREMENT RANGE : ethanediol (ethylene glycol): -500ordm;C agrave; 0ordm;C; Propanediol (propylene glycol): -500 deg; C agrave; 0 deg; VS; Windshield water - ethanol + water: -40 deg; C agrave; 0 deg; C, propylene glycol + waterSRF1): -40 deg; C agrave; 0 deg; C. Urea concentration 30% - 35%, battery acid 1.10 to 35%; 1.40 kg / L.3. TEMPEACUTE;RATURE COMPENSATION device: Temperature compensation device included to ensure measurement is easy and convenient at any time. PRECISION MEASUREMENT: Adjust the eyepiece group optical system: 4-8 times amplification system, stepless manual focus. Can adapt to; all eyes.4. HIGH QUALITY: Our chromeacute brass body; is reac;resistant to; chemical and severe corrosion; wear, the lifespan of the refractometer is increased several times compared to other aluminum housings. "