Single-Ended or Differential Inputs
One of the most common questions asked is the difference between single-ended and differential inputs.
Single-ended inputs are lower in cost, and provide twice the number of inputs for the same size wiring connector, since they require only one analog high input per channel, while differential inputs require signal high and low inputs for each channel. Single-ended inputs save connector space, cost, and are easier to install.
Differential inputs provide a more stable reading when EMI or RFI is present, and therefore, it is recommended to use them whenever noise is generally a problem. This is especially true when measuring strain gage and bridge type pressure sensor inputs, since they produce very small signals that are very susceptible to noise.