The Covimat 205 DC measuring device enables you to continuously measure viscosity in flow in accordance with DIN 53019 during product processing or manufacturing, e.g. for care products or foodstuffs.
The measuring unit of the Covimat 205 contains the electronics, which performs two functions:
– The motor makes the measuring body rotate at a preset speed.
– It measures the viscosity and outputs a corresponding analog signal.
The speed can be preset via a selector switch in 5 fixed steps or can be specified via an external control signal. The viscosity is measured by means of a torsion element. A standard 4-20 mA measuring signal proportional to the viscosity is output. This can be recorded or used via a customer control system.
The DC 40E or DC 40D measuring cells are suitable for continuous viscosity measurement in process plants with medium or high pressure and high temperatures. For direct temperature measurement in the measured substance, a cross connection is prepared for the insertion of a Pt 100 temperature sensor. The DC 40D measuring cell is equipped with a double jacket for temperature control.
Due to the use of a magnetic coupling, the measuring cell chamber is completely sealed off from the actual measuring device. There is no cloth socket present. The torque is transmitted via the
face coupling. The measuring cell is easy to clean with the usual cleaning methods. It is not piggable. A spacer between the measuring head and the measuring cell protects the measuring head from high temperatures in the area of the measuring cell.
A wide range of different measuring body sizes is available for the different measuring ranges (standard sizes: 24, 35, 51, 57, 59 mm Ø). For low viscosity substances a double gap system (DS) is also available.
Measuring system bearing: carbide or ruby/sapphire
Fields of Application
Oils and Fuels
Inline – viscosity measurement
The Covimat 205 DC meter allows you to continuously measure viscosity in flow, following DIN 53019 during product processing or manufacturing. The measuring principle of a rotational viscometer is as follows: A measuring body rotates at a given speed in the medium to be measured. The force with which the fluid brakes this rotation is a direct measure of viscosity.
Since the Covimat is a classic rotational rheometer, it measures viscosity, unlike oscillating instruments or capillary viscometers,
independent of the density of the medium. Density fluctuations do not influence the measurement.
This measuring principle is also used for viscosity measurement in the laboratory. This makes a direct comparison with measurement results of laboratory instruments is easily possible. The measuring range is variable by selecting the measuring bodies and different speeds, so that all liquids or pastes that can be pumped can be measured. All Covimat 205 process viscometers provide an output signal that is available as a process and plant control value.
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