Servo inclinometers provide reliable and most accurate tilt and inclination measurements for demanding industrial, military and scientific applications.

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High Precision Servo Inclinometers

Our high precision servo inclinometers (e.g., AILSO type) operate according to a method which some may still know about live band tension measuring instruments. You have a rotatably mounted coil in a magnetic field. At this there is a pendulum with a mass. When the sensor is tilted, the pendulum tries to follow the gravitational field and align itself. Controlled by a position sensor, however, a current flows through the coil, which holds the pendulum in a defined position. This current signal is converted into a voltage signal and then corresponds to the sine function of the tilt angle.

In the range of small +/- 10 degrees tilt, the sine function can be considered as linear. The sine function must be taken into account for applications that require the maximum possible accuracy, especially for measuring ranges greater than +/- 10 degrees. The measured value calculation can be done via a linearization with the aid of cleverly selected interpolation points; However, the highest accuracy can only be achieved by a trigonometric calculation. The possible measuring ranges of the inclinometers are between +/- 1 degree and +/- 90 degrees. In practice, however, the maximum possible measuring range of +/- 90 degrees should not be used as much as possible, since the slope of the sine function in this range is very low and thus only a small signal change is obtained.

For this reason, you should use the inclinometer, depending on the application and accuracy requirement, only up to a maximum of about 75 or 80 degrees. The standard version requires a regulated, bipolar supply voltage (+/- 15 volts DC) and provides an output signal of +/- 5 volts proportional to the sine wave. There is also a variant for a supply voltage of 24 Volt DC with a built-in 4 - 20 mA amplifier. If longer cable lengths are required, it makes sense to use the same version with built-in amplifier. The resolution of the inclinometer is up to an arcsecond and better.

Thus, these sensors are ideally suited for applications in all areas requiring high-precision inclination measurement. Examples are geophysics, tunneling, stabilization systems in shipbuilding and the alignment of antenna systems. For the linearization of the sine values, we have developed our own device with which the user can also switch the physical units and display the slope in degrees, in millimeters per meter, in percent and in degrees / minutes / seconds.

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