This model is most widely used for Raw Maple Sap testing and for Synthetic or Semi-Synthetic Machining Coolants This is THE unit of choice for Reams Testing (RBTI)! This unit is TWICE as accurate as 0-32% models! This model is handy for the testing of low sugar fruits and vegetables, Reamsian Bodily Fluids (per the Reams Biological Theory of Ionization), Maple Sap or for synthetic or semi-synthetic coolants. For machining and grinding coolants, please consult the Technical Data Sheet for appropriate concentration of fluid. This model is designed to give HIGHLY accurate readings with 0.10 Brix divisions (accuracy is +/- 0.10 Brix). All RHB models use ambient light, no battery or power source is required. Models with the “ATC” suffix are equipped with “Automatic Temperature Compensation” for accurate measurements without recalibration after shifts in ambient working temperature (field use). This model sells for $90 and up at most retailers. Get yours today at Wholesale prices! This unit comes with a THREE YEAR WARRANTY against manufacturers defects. If its not working properly, you get a replacement for free. An eBay first for QUALITY Refractometers! Accessories included: Operations manual Mini-screw driver Pipette Specifications Measurement scale range Brix 0.0 to 10.0% Accuracy + or - 0.1% Resolution 0.1% Ambient temperature for unit operation 10 to 30 degrees C Sample volume > 0.1ml Measurement time Instantaneous Body type Copper alloy with a nickel-chrome coating Illumination Ambient light; unit requires no additional power source Dimensions 40 x 40 x 185mm (H x W x D) Warranty 3 years.