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|Author||Topic:Digital vs. Analog Sensors||1306 Views|
3 May 2011 at 8:49am
Where are differences between the two types of sensors: analog and digital? What type possess better accuracy and why?
3 May 2011 at 9:28am
The difference between digital and analog sensors is the configuration of the data coming out of the sensor. Generally, a sensor that measures more than one variable (for example, temperature and soil moisture) will have a digital output so that a data logger can tell the difference between the temperature measurement and the soil moisture measurement. If a sensor is only measuring one variable, it can have an analog, or voltage output.
The type of output doesn't really relate to how accurate the sensors are and the decision to go with digital vs. analog has more to do with the type of data logger you have and the measurements that you want.
If you want more than one measurement coming out of one sensor, you should go digital.
If you want to use a different communication protocol, such as SDI-12, you'll need to go with a digital sensor.
Analog and digital sensors from Decagon have the same accuracy.
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