d-Tilt-SG is a fully waterproof in-place tilt sensor for geotechnical and civil applications. It is based on Analog Devices’ excellent MEMS acccelerometer technology. It has a wide range of measurement (0 to +/-30 arcdeg). The duty-cycle digital signal from the accelerometer is processed by the on-board microcontroller, giving typical accuracies to within 0.025arcdeg, with a resolution of 0.01arcdeg. Each sensor is individually calibrated and temperature compensated using a digital temperature sensor that is incorporated inside the sensor.
The RS485 output signal is an ASCII encoded message that includes the unique Sensor_ID, the Sensor_Type as well as the temperature and tilt data. This eliminates the necessity for expensive analog-to-digital conversion so that the low-cost readout unit outputs data in real world units (arcdeg and oC). Readings can also be made using the USB port of a PC or web-book computer (SensorViewer). Long term, low power, data logging is possible using the low cost d4Logger solution. A Plug-and-Play network of d-Tilt-SG sensors (or any other YieldPoint Instrument) can be built in minutes using YieldPoint's Ethernet gateway and/or dMesh telemetry solutions.