Robinair ROB75240 - Refractometer

• The ROB75240 Hand Refractometer is a portable, precision optical instrument used for measuring the freeze point of engine coolant and the operation state of battery charging liquid. • It is used on transportation vehicles, such as cars, tractors, tanks, ships, etc., which use propylene or ethylene glycol for coolant and sulphuric acid for charging liquid. • It can also be used for checking the strength of electrolyte solution batteries. • This precision instrument features high-quality optics with ultra-smooth focusing. • Scale range: 32DEG F to -60DEG F