The 60-C5 is an external circulation type constant temperature water tank provided with a thermo-module. The temperature can be set in the range of 10 to 60°C and the unit is perfectly suited for connection with a refractometer. An upgraded version of the 60-C4 model, featuring an increased tank capacity of 1.0L and an improved resolution of 0.1℃ which makes it even easier to use.