They are known by several names such as tilt sensor, inclinometer or even pitch & roll indicator. The most common inclinometer is for measuring single axis X or dual axis X & Y axis however on request, the Z axis can be measured using a separate device. All incorporate the latest high-performance MEMs sensing technology and are further enhanced with internal compensation circuitry for high accuracy performance and long-term stability. The only other consideration should be the output required. Current outputs (4-20mA) can be used for long transmissions up to 2000 metres. Analogue outputs are most common having 0-5, 0-10V, 0.5-4.5V or even +/-5 or 10V. Digital output version are available such as RS-232, RS-485, TTL, PWM and CAN.