Waters 410 refractometer

Differential refractometer from Waters, type 410.
The 410 is a differential refractive index detector designed for high performance liquid chromatography applications. It can operate as stand-alone unit with an integrator or chart recorder, or with a system controller or data system. The 410 functions with solvents with refractive indices between 1.00 and 1.75. The measurement range of the instrument is 5×10(-8) to 5×10(-3) refractive index units (RIU) full scale.
Flow rate: 0.3…10 ml/min.
Housing (D)x(H)x(W): 49 x 23 x 28,6 cm.