Temposonics
®
MH Digital
Operating Manual
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1. Product description and technology
Temposonics
®
sensors can be used in versatile mobile machines without any restriction and replace contact-based linear sensors like poten-
tiometers. Highly dynamic systems are controlled safely by means of Temposonics
®
sensors, thus enhancing the productivity, availability and
quality of the working process of the machine. Insensitive to vibration, shocks, dust and weathering influence and electro-magnetic disturbanc-
es. Temposonics
®
MH Series sensors 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.
Magnetostriction
Temposonics
®
linear sensors are based on the magnetostrictive tech-
nology. 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.
Simple Mechanics
The extremely robust sensor consists of the following main parts:
The innovative connector system which is easy to install in a few
seconds, any soldering or crimping needless, dust-and waterproof
up to IP69K.
The flange housing with built-in electronics and signal converter.
The position magnet as 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.
The pressure pipe placed within the drilled piston rod contains the
protected magnetostrictive sensing element.
Magnetic field
strain pulse
Magnetic field
position magnet
Mechanichal
strain pulse
Moveable
position magnet
Strain pulse
detector
magnetostrictive
sensing element
(waveguide)
Current
interrogation
pulse
Measuring principle
Temposonics
®
Connector system (IP69K)
Flange housing
Position magnet
Pressure pipe
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- Due to small dimensions MH 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 all common used output signals:
Analog: VDC / mA
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PWM
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Bus protocols: CANopen, SAE J1939
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