RHB-90ATC (58%-90% Brix scale) Hand held Refractometer in a blue, foam-lined hard case. This Tri-scale unit is especially necessary when testing high sugar items like honey. 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). The RHB-90ATC DOES have ATC with a compensation range of 50-86'F (10-30'C). Included are: a pipette for dropping test fluids onto the prism, a mini screwdriver for scale calibration, and a Users Guide; in a blue, foam-lined hard case Brand NEW! Ships ASAP from California! Brix Scale: Scale Range: 58%-90% Brix Divisions: 0.50% Brix Accuracy: +/- 0.50% Baume Specific Gravity Scale: Be Scale Range: Be @ 20C 38% - 43% Divisions: 0.50% Accuracy: +/-0.50%