The Master-M is for when water resistance is not a priority and the Temperature Compensation will be carried out manually. These refractors are not equipped with the Automatic Temperature Compensation feature.
Master-2M is the mid-range measurement model of the Master-T series. Measurement range is Brix 28.0 to 62.0%.
Master-3M is high-range model of the Master-M series. The measurement range is Brix 58.0 to 90.0%.
Master-4M has a measuring range between the Master-2M and the 3M refractometers. Its measurement range is Brix 45.0 to 82.0%.
Master-10M is low concentration model. The measurement range is Brix 0.0 to 10.0%.
Master-53M is wide range model of the Master-M series. The measurement range is Brix 0.0 to 53.0%.