Hand Held Refractometer 		   MASTER-20Pα 		
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	 		 			MASTER-20Pα is for low concentration measurements such as juices, cutting oil, etc. It has the automatic Temperature Compensation (ATC) model with water resistant feature (IP65).The MASTER-20α is made of metal, and the MASTER-20Pα is plastic. The specifications are exactly the same. For salty and acidic samples, choose the plastic body, MASTER-20Pα.