The NEW PEN-Harvest Refractometer is designed for measuring Brix/Sucrose. The PEN type refractometer is extremely easy to use. Just dip it in the sample and press the start key or press the start key first and then dip it in the sample. It takes 2 seconds to get the reading and you can rinse it off under the faucet.
The PEN-CASE can be clipped to your belt for easy carrying.