MODEL 2351 MASTER-53α           : Handheld Refractometer,Brix 0 to 53%, ATC & IP65

MODEL 2352 MASTER-53T            : Handheld Refractometer,Brix 0 to 53%,ATC

MODEL 2353 MASTER-53M          : Handheld Refractometer,Brix 0 to 53%

MODEL 2381 MASTER-20 α          : Handheld Refractometer,Brix 0 to 20%,ATC & IP65

MODEL 2382 MASTER-20T            : Handheld Refractometer,Brix 0 to 20%,ATC

MODEL 2383 MASTER 20-M         : Handheld Refractometer,Brix 0 to 20%

MODEL 2354 MASTER-50H           : Handheld Refractometer,Brix 0 to 50%,Heat resistant

MODEL 2364 MASTER-80-H          : Handheld Refractometer,Brix 30 to 80%,Heat resistant

MODEL 2374 MASTER-93H           : Handheld Refractometer,Brix 45 to 93%,Heat resistant

MODEL 2491 MASTER-S/Mill- α  : Handheld Refractometer,Seawater Salinity Refractometer,0-100%,

ATC & IP65

MODEL 2491 MASTER-S/Mill-M : Handheld Refractometer,Seawater Salinity Refractometer,0-100%