She points out that while colostrum with a reading of 22-23% (rather than the normal 25-26%) is still good for calves, it can nevertheless indicate an issue with cow health. “It might be that ...

The Rudolph J257 Refractometer offers 1 pt, 2 pt, or a full multi-point calibration. Calibration can be done at 20°C, 25°C or any user selectable temperature within the available range.

The modern versions of the Abbe refractometer have improved design features, such as thermo-stabilized prism mounts, fixed telescope mounts and a combined view of the shadow boundary and scale, ...