MISCO DD-3 PA Digital Dairy Refractometer, Colostrum, Milk w/ Armor Jacket TDS Meter so the question is: which

so the question is: which buffer solutions do I need

when light passes from one medium to another

Reinforced Daylight Plate

Ideal for Veterinarian's or checking Wrestlers Hydration levels

The large 24-character LCD display is easily read

MISCO DD-3 PA Digital Dairy Refractometer, Colostrum, Milk w/ Armor Jacket TDS Meter so the question is: whichMISCO DD 3 Palm Abbe Digital Dairy Handheld Refractometer, Colostrum (% Brix), Milk Solids, Urine (sg), Blood Serum Protein (g dl) Comes with a ARMOR JACKET MADE IN THE USA! INSANE PRICE FOR THE POWER! DID WE MENTION THAT IT IS MADE IN THE USA? IT IS! One BRAND NEW DD 3 Digital Dairy Refractometer provides reliable estimates of the percent solids in waste milk, blood plasma protein concentration, colostrum quality, and calf hydration. Monitoring