The RX-5000α (alpha) is an automatic digital refractometer which has a thermo-module to control temperature, a constant temperature water bath is not necessary. It displays the top-and-bottom-limit-bar for your set control range. This product comes standard with a two (2) year limited warranty against manufacturer’s defects from the date of the original purchase. The warranty period can be extended to three (3) years if the product is registered with ATAGO. FDA 21 CFR Part 11 Software Included in Standard Delivery.