8820Potentiometric angle of rotation sensor

Precise, durable and economical! Ideal for analogue angle measurements up to 350° with low torque and rotatable design. Protection class IP65 available on request - for reliable measurements in a wide range of applications.

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drehwinkel sensor drehwinkelsensor potentiometrisch 8820 burster angle displacement sensor potentiometer potentiometric

Productinformation

Principle	Potentiometric
Measuring range	0 ... 350° depending on the model
Non-linearity	from 0.1 % F.S.
Signal output	depending on the excitation voltage
Protection class	IP40 or IP65 with plug connection
Range of operating temperature	-55 ... +100 °C
Supply voltage	max. 50 V
Electrical connection	3 gold-plated solder pins or plug connection
Continuous rotation possible	Yes
Displacement speed	max. 600 rpm
Specific characteristics	Durability 100 x10⁶ flexible movements Low anliegend Can be spun Particularly economical

8820
DE EN

As an accurate and although economical angle sensor, this rotary potentiometer is suitable for all types of analogue angle measurement up to 350°.

Areas of application include, for example

Position signals on servo systems
Inclination scales
Cam and throttle valve positions
Pendulum roller controllers
Thread and belt tension measurement
Goniometric measurements on joints

The centrepiece of the potentiometric angular displacement sensors is a high-precision, wear-resistant resistance track made of plastic. Due to their high abrasion resistance, the sensors are particularly suitable for measurement tasks for quality assurance in ongoing production, where long durability and high rotational speeds are required.

The potentiometric Angle of rotation sensor works with a multi-finger wiper system made of precious metal contacts. This ensures good contact even at higher adjustment speeds and with vibrations.

The high-precision resistance tracks are pressed, laser-tuned and therefore particularly flat, thus offering the best conditions for high durability.

The stainless steel shaft is mounted in close-tolerance, low-friction, stainless steel ball bearings with double sealing discs.

High accuracy
Rapid measuring value collection
Configuration via PROFIBUS

TASK

On a completely automated test bed motor vehicle seats should be checked for their encumbrance. The following features should be tested and recorded:

Adjusting angle of the back
Torque required for turning handle
Total weight of the seat (with and without dummy)
End position determination

In order to be able to make a well defined statement about the categorization of the motor vehicle seat, the measurement data must be recorded and networked and deposited together as test result on the PROFIBUS level.

SPECIFIC REQUIREMENT

All test data should be transferred at the same time for storage, in order to obtain relevant samples of information for comparative logging of this test. A tare function is a consideration for mounted sensors addressing the issue concerning initial load (dummy load).

SOLUTION

For the recording of all mechanical values following sensors are used:

Adjusting angle of the back → angular displacement sensor model 8820
Torque of the turning handle → torque sensor model 8661
Total weight of the seat → 2 load cells model 8526
End position determination → displacement sensor model 8719

All sensor signals are recorded by 4 individual Sensor Profibus Modules 9221. Concomitantly the modules display the sensors with voltage and evaluate their signals. The transferring of measurement data takes place in parallel via PROFIBUS. The tare activation concerning a possible initial load, which can be modelled as a dummy, takes place directly via simple PLC unit communication, over PROFIBUS.