1
1. Introduction
1.1
general information
The TM Series In-Line Torque Transducers represent the new generation of high-precision torque
sensors with integrated electronic processing circuitry developed by Magtrol. The TM Series
transducers are available in three versions: TMb, TM and TMhS. TMb for all standard applications,
TM for high-precision applications and TMhS for high-speed applications.
The TM 300 Series includes transducers with the following torque ratings: 0.1 N·m, 0.2 N·m, 0.5
N·m, 1 N·m, 2 N·m, 5 N·m, 10 N·m, 20 N·m, 50 N·m, 100 N·m, 200 N·m, 500 N·m, 1 000 N·m,
2 000 N·m, 5 000 N·m and 10 000 N·m.
The TM Series In-Line Transducers, together with Magtrol's New TF Series Torque Flange
Transducers, offer a wide range of torque measurement requirements for the most demanding
applications.
1.2
desCription
All TM Series In-Line Torque Transducers consist of a torque measuring shaft and built-in signal
processing electronics. These elements, along with two sealed bearings having lifelong lubrication,
are all contained in an aluminium housing which also supports the shaft.
The upper part of the unit contains the built-in electronics. This part is sealed according to the
IP44 standard and offers protection against splashed water. A Souriau connector allows the torque
transducer to be connected to an external signal processing unit—such as the Magtrol 3410 Torque
Display—via a special cable assembly.
Figure 1–1 TMB 313 In-Line Torque Transducer
TM Torque Transducers perform the following main functions:
1. Measurement of static and dynamic torque and detection of torque direction.
2. Measurement of the shaft's rotational speed and detection of rotational direction.
3. Self-check.
The transducer's integrated electronic circuitry filters the torque signal and its built-in self-test
function checks the operation of the measuring chain. Each transducer also has a built-in temperature
compensation circuit. This assures that the accuracy of the measured torque is maintained regardless
of operating temperature.
