A consistometer continuously measures the consistency of a stream of material flowing through it. The consistometer includes a resilient member located in the stream of material and a reference member located outside of the stream of material and both members rotate synchronously. Sensors spatially related to the rotating members provide corresponding signals. A circuit connected to the reference member sensor provides reference member pulses in accordance with the reference member sensor sensing the passage of the reference member and a second circuit connected to the resilient member sensor provides resilient member pulses in accordance with the resilient member sensor sensing passage of the resilient member. A network provides an output corresponding to the consistency of the material in accordance with the reference member pulses and the resilient member pulses. Visual indicators connected to the sensors indicate that the sensors are providing their signals in accordance with the sensing of their corresponding members.
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