# SensorML 2.0 Examples

## Analog Detector

An analog detector is a PhysicalComponent that converts from one observable property to another observable property. This is in contrast to most digital detectors which typically convert from an observable property to some digital number representing a measure of that observable property. Thus while a digital detector typically takes an ObservableProperty as its inputs and outputs a Quantity, an analog detector typically takes ObservableProperty elements for both its input and output.

The example below is a simple thermistor which converts temperature to an electrical resistance which must then be measure by another device (such as a digital voltmeter). The output carries no units of measure since its is an ObservableProperty, but a calibration curve is typically provided which relates measured resistance to temperature. This is provided as a parameter in the example.

NOTE: SensorML 2.0 is not yet approved by the Open Geospatial Consortium (OGC). Examples are provided for evaluation and are subject to change during the standards review and approval process. Contact mike.botts@botts-inc.net for questions or recommendations.