Heinrichs Messtechnik GmbH
Page 12 of 118
OPERATING MANUAL TMU-W / UMC4
3.
The TMU-W sensor
3.1
Application domain of the TMU-W sensor
The TMU-W sensor is intended solely for the direct and continuous mass flow measurement of liquids and
gases under high pressure, irrespective of their conductivity, density, temperature, pressure, or viscosity.
The sensor can be utilised for the direct and continuous mass flow measurement of chemical fluids,
suspensions, molasses, paint, varnish, lacquer, pastes and similar materials.
3.2
Mode of operation
Measuring principle
The mass flowmeter is based on the Coriolis
principle whereby in a rotating system a
force (known as the Coriolis force) is exerted
on a mass at a rotation point that is moving
towards or away from this point.
System configuration
The flowmeter consists of a sensor mounted in to a piping system and a remote installed transmitter (see
Section 4.1, “Application domain of the UMC4” on page 22), connected to the sensor via a special cable (e.g.
on a wall or to a pipe).
The transmitter oscillates the flow tubes of the sensor by means of an excitation coil and captures, via pick-
up coils, the measuring signal which is proportional to the mass flow. After temperature compensation, the
measuring signal is converted into an analogue output signal that is consistent with the measuring range
setting.
Acquisition
Measured variables:
Mass flow,
Temperature.
m
F
C
2
