Description:
The electrolytic tilt sensor measures angles or level positions relative to gravity, expressed in degrees, arc minutes, or arc seconds. A single axis sensor measures in one direction, while a dual axis sensor or two single axis sensors at 90 degrees can measure in all directions.

Selection:
Choosing the right sensor depends on the angle range and sensitivity needed. For precise leveling, a single axis horizontal vial level is used, offering high sensitivity with a limited range. For larger angles, a vertical pool type level is suitable, available in single or dual axis with ranges up to ±90 degrees.

Operation:
The sensor outputs a voltage proportional to the tilt angle. Single axis levels have three electrodes, while dual axis levels have five. The fluid inside alters the conductive path as the level tilts, similar to a potentiometer.

Operating Parameters:
Sensors must operate in AC mode to avoid instability. Current must not exceed maximum limits to prevent self-heating and drift. Impedance must match the circuit type to control current.

Excitation:
Sensors can be energized using a bridge circuit or by exciting outer electrodes. Bridge circuits allow impedance matching, but require temperature compensation. Exciting outer electrodes measures impedance ratio, not absolute value, and requires careful current management. Microcontroller output ports can drive the sensor, ensuring no DC component is present.