C-Series Off-Highway
Installation Manual
I 5 I
3. Product description and technology
Temposonics
®
sensors are designed for use in applications which
may contain vibration, shocks, dust, exposure to harsh weather, and
electro-magnetic disturbances.
Temposonics
®
MH Series sensors can replace contact-based linear
sensors like potentiometers in many multipurpose applications. They
are successfully used in front axle and articulated frame steering
cylinders, hydraulic jacks and in steering systems for hydraulic units
on agricultural and construction machinery.
Temposonics
®
Connector system (IP69K)
Flange housing
Position magnet
Pressure pipe
1
2
3
4
Simple Mechanics
The extremely robust sensor consists of the following main parts:
1. The innovative connector system which is easy to install in a
few seconds, any soldering or crimping needless, dust-and
waterproof up to IP69K.
2. The pressure flange.
3. The pressure pipe attached to the pressure flange placed within
the drilled piston rod contains the protected magnetostrictive
sensing element.
4. The magnet is the only moving part which is assembled into the
piston bottom. This permanent magnet travels wear-free and
contactless along the pressure pipe and measures the actual
position.
• Due to small dimensions C-Series Off Highway sensors require only
little space
• Suitable for operating pressures up to 350 bar
• Unaffected by surrounding media such as ageing or foaming oil
• Insensitive to shock and vibration
• Designed for all current supply voltages (12/24 VDC)
• Temposonics
®
sensors offer analog (mA) output signal
4
5
3
1
Measurement Cycle
1
Current pulse generates magnetic fi eld
2
Interaction with position magnet fi eld
generates torsional strain pulse
3
Torsional strain pulse propagates
4
Strain pulse detected by converter
5
Time-of-fl ight converted into position
Sensing element (Waveguide)
Position magnet (Magnetic fi eld)
Torsional strain pulse converter
2
Magnetostriction
Temposonics
®
linear sensors are based on the magnetostrictive
technology. By measuring the actual position with a non-contact
position magnet the sensor operates 100% wear-free. The absolute
operating principle enables reliable readings without any reference
point or recalibration. A mechanical strain pulse is triggered by the
travelling position magnet. The runtime of this ultrasonic wave is
measured precisely and compiled into standard electronic output
signals.
Fig. 1: C-Series Off-Highway in a cylinder (size comparison with a pencil)
Fig. 2: Time-of-flight based magnetostrictive position sensing principle
