Applied Geomechanics Model 801 Tuff Tilt Uniaxial Tiltmeter
All tiltmeters utilize some type of tilt transducer that generates an electric signal that corresponds to the level of displacement that the sensor experiences. While most tiltmeters use an accelerometer or pendulum to sense the incident force of gravity, the Applied Geomechanics Model 801 Tuff Tilt Uniaxial Tiltmeter utilizes an electrolytic solution to sense the amount of tilt experienced by the sensor. Electrolytic tilt sensors offer very high performance and have no mechanical moving parts to break or wear out.
Figure 1. Applied Geomechanics Model 801 Tuff Tilt
Although tilt sensors are used in a large variety of applications, the 801 Tuff Tilt is typically used in more rugged environments to monitor anything from land movement, to structure and bridge activity.
Wireless Tilt Measurement
Whether they are deployed in small or large quantities, rugged tilt sensors are often placed in areas where it can be difficult, not to mention expensive, to lay the conduit and wiring required in order to bring tilt measurements into any kind of intelligent control or data logging system. For situations like this, you can easily combine the NI WSN system with the Model 801 Tuff Tilt to deploy a distributed, wireless tilt monitoring system.
Connecting the Model 801 Tuff Tilt to the WSN-3202 Node
The ±5 V analog output of the Tuff Tilt connect directly to an analog input channel of the WSN-3202. The Tuff Tilt requires a power supply of 8-18 VDC with an operating current draw of 8 mA. Even though this is within the specification of the sensor supply output (SEN PWR) of the WSN-3202 node, the inrush current of the Tuff Tilt at power-on exceeds the 20 mA limit of the SEN PWR output. Therefore, you should power the Tuff Tilt sensor with an external power supply or 12V battery.
Figure 2. Connecting the Model 801 Tuff Tilt Sensor to WSN-3202