Force Sensors From Kistler Instrument Corporation

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Force, like any other physical phenomena, cannot be measured without disturbing the phenomenon being measured. Most force sensors have an elastic sensing element, whose deformation is a measure of the acting force.

In many force measurement systems (i.e. strain gauges, inductive and capacitive systems), this deformation itself must be measured. The sensing element must have enough compliance to provide sufficiently large deformation and hence useful sensitivity. These large deformations are undesirable because they limit the frequency response of the measuring system and also introduce geometric changes into the force measuring path which inevitably leads to measurement errors (i.e. linearity and hysteresis).

In piezoelectric force sensors the sensing element is the same as the transaction element which produces the electrical output signal from an acting force. Therefore, it is not necessary to measure the deformation (which will be much smaller than with other measuring systems). The resultant high rigidity of piezoelectric force sensors greatly reduces the disturbance (or geometric changes) caused by the measurement and provides an inherently high natural frequency and associated rise time. This permits the measurement of extremely fast events (such as shock waves in solids, impact printer and punch press forces) that otherwise might not be possible.

While piezoelectric force sensors are ideally suited for measuring dynamic events, they cannot perform truly static measurements. Although the electrical charge delivered under a static load can be registered, it cannot be stored for an indefinite period of time. For static measurements, highly insulated materials must be used for the sensor cables and connectors to insure a maximum discharge time constant and optimal operation of the charge amplifier (i.e. minimal draft). Quartz is used in all Kistler force sensor designs. Since it has an ultra high insulation resistance, static measurements are more feasible with quartz than with any other piezoelectric material. In fact, quartz -based piezoelectric systems can routinely measure large forces for minutes and perhaps even hours. Low level forces can be measured "statically" for much shorter intervals. This is why Kistler piezoelectric force sensors are often described as being "quasistatic."

PIEZOTRON® force sensors use the same quartz sensing element as standard (charge output) piezoelectric units and also have a miniature, built-in charge-to-voltage converter for low impedance voltage output. This allows the usage of general purpose cable in environments where moisture or contamination would be detrimental to the high insulation resistance required with high impedance sensors. PIEZOTRON force sensors have time constants long enough for calibration, but usually not long enough for static measurements. For this reason they are usually restricted to dynamic applications.

Applications:

  • Material testing, impact forces
  • Machinery and assembly tests
  • Insertion, extraction monitoring
  • Component insertion
  • Bearing reaction, machinery testing
  • Bolt, clamping and punch press forces

Features:

  • Compression and tension
  • Preloaded assembly
  • High rigidity, easy installation
  • Force ranges to 270,000 lb.
  • Wide measuring range (1 to 1,000,000)

Acceleration Sensors | Force Sensors | Pressure Sensors | Torque Sensors
Signal Conditioners | Cables | Calibration Equipment | Electronics | Mounting
Measuring Instruments | Monitoring & Control Units | Preloading Elements


 Kistler Force Sensors
 
Kistler Models 9047B, 9048B, 9046B4 3-Component Force Sensors
Two quartz pairs are sensitivie to shear and measure the force components Fx and Fy, while one quartz pair sensitive to pressure measures the component Fz of a force acting on the sensor. The electrical charges proportional to the different components are led via electrodes to the corresponding connectors.
 
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Kistler Models 9067, 9068, 9066A4, 9067A4 3-Component Force Sensors
Two quartz pairs are sensitive to shear and measure the force components Fx and Fy, while one quartz pair sensitive to pressure measures the component Fz of a force acting on the sensor. The electrical charges proportional to the different components are led via electrodes to the corresponding connectors.
 
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Kistler Models 9067B, 9068B, 9066B4 3-Component Force Sensors
Two quartz pairs are sensitive to shear and measure the force components Fx and Fy, while one quartz pair sensitive to pressure measures the component Fz of a force acting on the sensor. The electrical charges proportional to the different components are led via electrodes to the connectors.
 
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Kistler Models 9077B, 9078B, 9076B4 3-Component Force Sensors
Two quartz pairs are sensitive to shear and measure the force components Fx and Fy, while one quartz pair sensitive to pressure measures the component Fz of a force acting on the sensor. The electrical charges proportional to different components are led via electrodes to the corresponding connectors.
 
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Kistler Models 9167A, 9168A, 9167AB, 9168AB 3-Component Force Sensors
Two quartz rings are sensitive to shear and measure the force components Fx and Fy, while a pair of quartz rings sensitive to pressure measures the component Fz of a force acting in any direction on the sensor. The electrical charges yielded proportionally to the different components are led via electrodes to the corresponding connector contacts.
 
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Kistler Models 9251A, 9252A, 9250A4, 9251A4 3-Component Force Sensors
The force sensor contains 3 pairs of quartz rings which are mounted between two steel plates in the sensor housing. Two quartz pairs are sensitivie to shear and measure the force components Fx and Fy, while one quartz pair sensitive to pressure measures the component Fz of a force acting on the sensor. The electrical charges proportional to the different components are led via electrodes to the corresponding connectors.
 
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Kistler Models 9101A, 9102A, 9103A, 9104A Industrial Force Sensors
For monitoring of industrial processes, force sensors are required, which can be easily installed in machinery. Robust design and reliability during continuous operation together with good repeatability of the measured values are additional characteristics of these sensors.
 
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Kistler Model 9203 Quartz Force Sensors
This highly sensitive transducer is suitable for measuring quasistatic and dynamic tensile and compressive forces ranging from a few mN to 500 N. The special advantages of this transducer lie in its very high sensitivity, high frequency and small dimensions. Especially when measuring very small quasistatic forces it is necessary to ensure that the transducer is not exposed to temperature changes during the measurement.
 
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Kistler Model 9207 Quartz Force Sensors With High Sensitivity
The Model 9207 is a quartz force sensor with high sensitivity for measuring quasistatic and dynamic tensile and compressive forces in the range of less than 1 mN to 50 N. High rigidity, very small transverse sensitivity and minimum sensitivity to thermal influences are outstanding features of this sensor, which is therefore suited for general applications. The sensor is mounted in a bore with a M10x1-thread and the force introduced at its front end.
 
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Kistler Models 9211, 9211A1 Quartz Miniature Force Sensors
Miniature quartz force sensor for measuring dynamic and quasistatic forces from a few mN to 2500 N. Very high resolution, high natural frequency, very small dimensions, welded construction. High temperature cable tightly attached to sensor case.
 
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Kistler Model 9602 Force Sensors With Integrated Electronics
The sensor is suitable for indirect force measurement (force shunt mode) as well as for direct measurements in the main force flux. The force sensor produces an amplified, low- impedance force-proporational voltage signal which can be directly processed by machine control systems, for example. The sensor connection is made via a multiple cable which can be a plug-in or integrated type.
 
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Kistler Models 9333, 9343, 9363 Press Force Sensors
These ready-to-use piezoelectric force sensors are particularly suitable for measuring rapidly changing compression forces in presses. The press force sensors are supplied calibrated and can be mounted in various ways. Three sizes (with maximum measuring range of 50, 70 and 120 kN respectively) are available.
 
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Kistler Model 9211AAE Quartz Miniature Force Sensors
Miniature quartz force sensor for measuring dynamic and quasistatic pressures in the mold in injection molding via an ejector or measuring pin. Very high resolution, high natural frequency, very small dimensions, welded construction.
 
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Kistler Models 9213, 9213A1 Quartz Miniature Force Transducer
Miniature quartz force transducer for measuring dynamic and quasistatic forces from a few mN to 2500 N. Very high resolution, high natural frequency, very small dimensions, welded construction. High temperature cable tightly attached to transducer case.
 
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Kistler Model 9205 Quartz Force Transducer With High Sensitivity
Quartz force transducer with high sensitivity for measuring quasistatic and dynamic tensile and compressive forces in the range of less than 1 mN to 50 N. High rigidity, very small transverse sensitivity and minimum sensitivity to thermal influences are outstanding features of this transducer, which is therefore suited for general applications.
 
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Kistler Model 9601A VarioCOMP Multicomponent Force Sensors
Multi-component, quartz force sensor for use in industry. The sensor can optionally be supplied with 1, 2 or 3 measuring axes. Various versions of connector outlet and the integrated cable provide optimum conditions for attachment to the equipment tested.
 
Kistler Model 9204B PinSens Force Sensors
PinSens Type 9204B is a simply constructed force sensor for indirect mold cavity pressure measurement behind a measuring or ejector pin. The diameter of the measuring or ejector pin must be taken into account in the conversion from for to pressure.
 
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