Item Description: 28-62% Brix with Automatic Temperature Compensation for Evans Cooling Waterless Heavy Duty Thermal Coolant (HDTC) Specifications: Measurement scale range: Brix 28.0 to 62.0% Accuracy: Brix + or - 0.2% Resolution: Brix 0.2% Ambient temperature for unit operation: 10 to 30 degrees C Sample volume: 0.1ml Measurement time: Instantaneous Body type: Aluminum Illumination: Strong Ambient light; unit requires no additional power source Warranty: 3 years Dimensions: 40 x 40 x 150mm (H x W x D) Included are: A case, a pipette for dropping test fluids onto the prism, a mini screwdriver for scale calibration, and a Users Guide. For use with Evans Cooling Waterless Heavy Duty Thermal Coolant, but it could be used for other applications. IF you have a question, we are happy to answer them for you. That's why we are different. We KNOW about refractometers for all sorts of applications! Test us out! Calibrate the refractometer. Using new Evans HDTC, place a drop on the refractometer glass and check the reading. If it does not read 55.7, use the screwdriver provided to set it to 55.7. Testing the Coolant: After there has been thorough circulation of the coolant through all parts of the cooling system, including the radiator and the heater core, obtain a coolant sample for the refractometer from a “well-mixed” location. The reading should not exceed 54.4 Brix, which corresponds to 3.0 percent water. ALWAYS CONSULT THE TECHNICAL DATA SHEET FOR TROUBLESHOOTING ADVISE WITH THE COOLANT Models with the “ATC” suffix are equipped with “Automatic Temperature Compensation” for accurate measurements without re-calibration after shifts in ambient working temperature (field use). This unit does have ATC and the range is 50-86'F/10-30'C. Samples must cool off for a period of seconds (depending on fluid viscosity) before using the instrument. Micro-climates can be created for a short while, causing some results to be inaccurate. Waiting a few seconds to allow samples to cool (like a spoonful of hot soup) will yield steady results without compromise! High Quality! This unit comes with a THREE YEAR WARRANTY against defects! It should last you for a decade or more! Nobody else at backs their products like we do! This unit is made of durable machined aluminum, not cheap plastic! Calibration Fluid: $18.99 for a 2ml vial! To maintain the accuracy of the unit over time, it is advised that you calibrate the unit against a known sample. This ensures that the readings you get are consistently accurate! Your unit is factory calibrated, but will need a tune-up from time to time. We recommend playing it safe and calibrating it once every 20 samples tested or 2 per year. You may find that over time, you need to do it more frequently or less frequently. A 2ml vial of our Brix Calibration Fluid, 60.0% Brix @ 20'C is laboratory prepared and is an excellent standard to keep your unit accurate. When you purchase the Brix Calibration Fluid with the refractometer, shipping is included. Otherwise the domestic S H is $5.00. WE'VE BEEN SELLING ONLINE SINCE 2001! NO ONE HAS SOLD MORE REFRACTOMETERS! NO ONE HAS MORE EXPERIENCE! We carry other types of HIGH SUGAR Refractometers for other purposes too! National Industrial Supply 30777 Rancho California #891023 Temecula, CA 92591, USA Sales 310.748.6858 Fax: 310.733.5480 E-mail: nisupply@gmail.com