Temperature compensated optical measuring instruments

Details Temperature compensated optical measuring instruments Temperature compensated optical measuring instruments

G - Physics

01

N

73/100, 73/59

G01N 21/01 (2006.01) G01N 21/41 (2006.01)

Patent

CA 1074150

ABSTRACT OF THE DISCLOSURE To reduce errors in a refractometer caused by temperature effects from changes in the flow rate of fluids passing through the instrument, the flow of heat is adjusted to balance the flow-rate-dependent temperature increases against the flow-rate-dependent temperature decreases that occur with the same change in flow rate in each flow path. Some of the techniques for adjusting the flow of heat are: (1) controlling the temperature of the fluid at the inlet of the instrument with one heat exchanger and the temperature of the body of the instrument with another heat exchanger; (2) controlling the tempera- ture of the walls of the instrument with a heating coil; and (3) emitting heat within the flow path from a trans- ducer.

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