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Temposonics

ET Analog ATEX / IECEx / CEC / NEC / CCC Certified

Operation Manual

3.2 Nameplate (example)

3.3 Approvals

See chapter “8. Technical data of Temposonics

ET” on page 25 f.

3.4 Scope of delivery

ET-F/-W/-M/-S (rod sensor):

• Sensor

ET-P (profile sensor):

• Sensor
• 2 mounting clamps up to 1250 mm (50 in.) stroke length

+ 1 mounting clamp for each 500 mm (20 in.) additional
stroke length

4.1 Functionality and system design

Product designation

• Position sensor Temposonics

E-Series

Sensor model

• Temposonics

ET-F/-W/-M/-S (rod sensor)

• Temposonics

ET-P (profile sensor)

Stroke length

• 50

…

3000 mm (2…118 in.)

Output signal

• Analog

Application

Temposonics

position sensors are used for measurement and

conversion of the length (position) variable in the fields of automated
systems and mechanical engineering.

Principle of operation and system construction

The absolute, linear position sensors provided by MTS Sensors
rely on the company’s proprietary Temposonics

magnetostrictive

technology, which can determine position with a high level of
precision and robustness. Each Temposonics

position sensor

consists of a ferromagnetic waveguide, a position magnet, a strain
pulse converter and supporting electronics. The magnet, connected
to the object in motion in the application, generates a magnetic field
at its location on the waveguide. A short current pulse is applied to
the waveguide. This creates a momentary radial magnetic field and
torsional strain on the waveguide. The momentary interaction of the
magnetic fields releases a torsional strain pulse that propagates the

4. Product description and commissioning

length of the waveguide. When the ultrasonic wave reaches the end of
the waveguide it is converted into an electrical signal. Since the speed
of the ultrasonic wave in the waveguide is precisely known, the time
required to receive the return signal can be converted into a linear
position measurement with both high accuracy and repeatability.

Modular mechanical and electronic construction

• The sensor rod protects the inner sensor element.
• The sensor electronics housing, a rugged stainless steel

construction, contains the complete electronic interface with active
signal conditioning.

• The external position magnet is a permanent magnet. Mounted on

the mobile machine part, it travels along the sensor rod and triggers
the measurement through the sensor rod wall.

• The sensor can be connected directly to a control system. Its

electronics generates a strictly position proportional signal output
between start and end position.

Fig. 1: Label of sensor for use in
explosion hazardous areas

Fig. 2: Label of sensor without certifica-
tion for use in explosion hazardous areas

Fig. 3: Time-of-flight based magnetostrictive position sensing principle

Sensing element

(Waveguide)