Force sensors - Import export

The force to be measured must be introduced axially and perpendicularly to the entire surface of the inner and outer bands of the sensor in the opposite direction. Conversion of the acting force into an electrical output signal is performed by strain gages connected together in a full bridge circuit. To achieve optimal accuracy, the base of the sensor should rest on a smooth level surface, hardened to at least ≥ 58 HRC with sufficient dimensions. The base cover welded to the surface has a stabilizing effect on the sensor element. Lateral forces must be avoided anyway as they distort the measured results. Tension and bending relief for the sensor cable is to be carried out on the machine side. FEATURES: — Measuring ranges from 0 ... 100 N to 0 ... 200 kN — Centric throughout hole — Flat disc design — Made of stainless steel — Completely welded sensor body — Nominal characteristic value standardization possible — burster TEDS optionally available

The force measuring chain is an universal reference measuring chain for the calibration of press-fit force measuring equipment. It finds applications in the quality assurance, commissioning and equipment monitoring fields. A DAkks calibration certificate is included so that the force measuring chain can be traced back. The calibration is traceable through accreditation at the German Accreditation Body. The calibration certificate records the displayed values for mounting positions at 0°, 120° and 240°. During calibration in field, the reference load cell is inserted in line with the flux of the press-fit measuring equipment. The force application is of central significance here for the quality of the measurement. Special force application parts are required, so that the line of action of the force agrees as exactly as possible with the geometrical axis of the load cell that is to be measured (central loading).

Inside the multi-component force transducer are two webs, each offset by 90°, each with a strain gage full bridge, which convert the radially acting X / Y forces on the guide bush into an electrical signal. Due to the sensor body made from a block with its special structure, the sensor has a very high degree of dimensional accuracy and low crosstalk between the two forces. Due to the special design, the sensor has excellent linearity properties and is designed for a long service life in dynamic applications. The two independent signal connections allow flexible adaptation and further processing. Features: — Measuring ranges: 0 ... 4448 N / 0 ... 2224 N (0 ... 1000 lbs / 0 ... 500 lbs); 0 ... 8896 N / 0 ... 4448 N (0 ... 2000 lbs / 0 ... 1000 lbs) — Further measuring ranges on request — Non-linearity < 0.1 % F.S. — Low cross talk < 0.75 % F.S. — High dimensional accuracy, because sensor is made from one part — Excellent price/performance ratio

The newly developed sensor PROFIBUS module model 9221 is predestined for the integration of various analog sensor output signals into complex, net worked and peripheral automation structures. This module finds its fields of application in the industrial automation technology as well as the test rig technology based on its secure and reliable transfer mode, the fast transfer speed and its simple construction. The inputs (e.g. PLC signal gauge) and outputs in addition to the external control allow a zero compensation by trigger via proximity switch or fast alerting on passing of set point values. Industrial type connection and mounting techniques enable the user the adaption and integration in the existing mechanical and electrical environment. The excellent quality of measurement together with the high grade capture of mean values also enable the application in research and development. The use of standardized PROFIBUS protocols makes the connection an easy task for the programmer.

The range of functions has been limited deliberately to ensure operation is simple and self-explanatory. With its unique, large and clear digit height of 20 mm, the digital display can be installed easily in process control panels and control cabinets. Thanks to the large choice of measurement signals that can be indicated, the display is ideal for use in a huge range of industry-based applications. As a simple and compact digital display, it can also be used as a multi-channel solution in laboratory or test systems, where several different measurements may need to be taken and displayed simultaneously. Specific characteristics: — Less expensive digital display — For force, pressure or torque measurements using gauge sensors — Two limit alarms optionally available — Extremely easy-to-read display with 20 mm digit height — Display range -1999 to + 9999 — TARE function — Scaling possible using teach-in procedure or by entering sensor data directly

The Load cell model 8451 has been developed for measuring the forces that occur during press operation. The internal measuring elements have a rugged design, which mean they can cope reliably with the steep force curves that are typical of press applications. They can be fitted or replaced quickly and easily on the press ram without the need for additional components around them. The force sensor is placed between the tool and the press ram and can thus measure the actual compression force directly in the axis of operation. The load cell measures the compression forces between the circular contact surfaces of plunger and tool. The pin on its top side and hole on its lower face are simply provided for mechanical fixing and centering the components correctly. The connecting cables are suitable for drag chains, designed for many movements and stably fastened in the sensor housing.

With its flat construction this force sensor is specially designed to be fitted to a pedal. By this, the operator's forces for each respective action, for example brake tests, can be measured directly and the reaction of the vehicle or machine can be designated. This applies to real test drives, as well as in driving simulators. Due to the special construction of the membrane, it is irrelevant whether an upright or hanging pedal is concerned. The sensor is designed in a way that unavoidable lateral forces have as little impact on the measurement result as possible. Using a central internal thread on the control surface, various machine-related adaptor parts can be easily mounted. Because the pedal is convex-shaped on its surface, the pedal force sensor has a very rigid base plate and therefore can easily be applied to various geometrics. The mounting can even take place on a pedal with an elastomer covering.

The sensor element consists of a double bending beam with applied strain gages. Changes in the ohmic resistance of the strain gage fullbridge caused by applied forces are converted into electrical voltages. The precise value (characteristic value) of the output voltage, resulting from the application of a rated force to the sensor, is specified in the accompanying calibration protocol. The sensor has to be mounted by two screws on the cable side. The opposite side is meant to receive applied forces (loads). Once the rated stress or strain is exceeded by 20 %, further deflection of the bending beam is prevented by an integrated, mechanical stop. This protects the sensor element against permanent deformation.

The tension and compression load cell model 8435 enables universal and fast installation, requires hardly any installation space and upgrades with technical data that are readily achieved by larger sensors. Due to its excellent price-performance ratio with regard to its mechanical and electrical data, the force sensor finds its place in products that are also manufactured in larger quantities and calculated with a small budget. This model of load cell uses proven strain gage technology to perform measurements. Strain gages are applied to the sensitive element and connected to form a full bridge. FEATURES Measuring ranges from 0 ... 200 N up to 0 ... 5000 N Small dimensions Inexpensive execution Stable anti-kink protection Made of high quality stainless steel Connecting cable suitable for drag chains burster TEDS optionally available

Inductive displacement sensors of this series measure linear displacements and indirectly all mechanical values convertible into displacements by additional equipment (i.e. tension and compression forces, extension, torque, vibration). The sensor body equipped with a connector has an outer diameter of only 8 mm and therefore is especially well suitable for the integration in dimensionally restricted structures. Typical application fields are displacement and extension measurements on: —Machines —Servo systems —Motor vehicles —Test benches —Production plants The cylindrical case made of stainless steel, houses a differential transformer (LVDT). It consists of a primary and two secondary coils with axially moveable core. A displacement of this core changes the magnetic induction of the coils. The INLINE carrier frequency amplifier converts the displacement into a direct proportional electrical DC voltage.

Load cell model 8417 measures the tension or compression force between both axially mounted metric exterior threads on the cylindrical sensor housing. Forces are only applied to the threadings, which are especially long, to accommodate counter nuts and must not be affected by external influences such as bending, lateral force or torsion. Any contact with units affixed to the sensor housing - even on the front - must be avoided. The measurement element is a membrane perpendicular to the axis of the sensor with a strain gage full bridge applied to the inner surface, which requires stable excitation with a rated value of approx. 1 mV/V. The connection cable is led radially out of the housing through a sleeve which is used for strain relief. FEATURES: —Measuring ranges from 0 ... 10 N to 0 ... 5 kN —Very small dimensions —Made of stainless steel —Rugged construction —Simple screw mounting —burster TEDS optionally available

This miniature force sensor was optimised with respect to its height and is, at only 3.4 mm, the lowest known sensor with strain gage technology. Hardly higher than the diameter of its connection cable, it can also be housed in conditions where space is limited. Along with its minimal geometry, the force sensor is also particularly light. It has a high resonance frequency to follow quickly changing load alternations. Despite its extreme miniaturisation, in its application it remains completely robust and suitable for industry, not only with regard to the highly flexible cable connections or the full welding of sensors for the measurement ranges ≥ 0 … 10 N. The miniature compression force sensors are flat, cylindrical discs with covered bottoms. The central load application button for taking on compression forces is an integrated part of the top, which is the sensor‘s membrane.

Model 9180 supports force, pressure and torque sensors operating on the strain gauge principle, as well as the connection of position and angle sensors in potentiometer or DC/DC configuration. It also allows the measurement of process signals ± 1 V/ 5 V/ 10 V or 0 ...1 mA, 0(4) ... 20 mA. The current measured value is indicated on the 14 mm high LED main display, while a second display located directly below provides a reading of the peak value. The display is particularly suitable for highly accurate measurements due to the high accuracy of 0.1%. It is also possible to monitor up to 4 limit values and provide the results via relay or transistor outputs. Thus the process value display can be used for classification, process and control tasks. The current measured value is frozen on the display by activating an external HOLD signal. The TARE function is useful for balancing out previous loads for example.

The SM71 series force sensors were specially developed for measuring clamping forces. The short measuring path of 0.019 - 0.14 mm (depending on the measuring range) and a natural frequency in the kHz range guarantee optimal results even for highly dynamic tasks. Typical applications include the simple determination of screw preloads, where the force sensor is used as a “measuring washer”. The very good reproducibility is less than one percent of the nominal load. The sensor is available in measuring ranges from 20 up to 2000 kN. Hardened washers are already included in the scope of delivery for quick and easy installation. The extremely simple and robust design is made entirely of stainless steel (protection class IP68).