The Sensor Network Museumtm - External Data Acquisition
In some cases it is not feasible or not optimal to interface the sensors or sensor equipment directly to the MCU on a WSN node. In such cases external data acquisition hardware is necessary to (i) condition and/or (ii) convert the signals. For a detailed example see the Harvard Volcano Deployment.
Analog to Digital Conversion
- 16 channel ADC Linear Technologies LTC2494 [pdf] 2.7V ok, SPI, 2 uA in power down, 200 uA typical, 15 Hz (7.5 Hz) conversion 1x (2x), 16 channels
- Analog Devices AD7794 [pdf] 2.7V ok, SPI, 1 uA in power down, 400 uA typical, 6 differential inputs
- Analog Devices AD7710 [pdf]
Data Acquisition Standards
- SDI-12 - A Serial-Digital Interface Standard for Microprocessor-Based Sensors [pdf]
- Example SDI based sensors for environmental monitoring: SDI-12 Submersible Level Transducer [pdf]
- Various SDI-12 sensors
- Example SDI-12 Interface Board [pdf]
Traditional Dataloggers
- http://www.onsetcomp.com
- campbell dataloggers