When a 0-5V voltage input isn't enough, this Phidget can be used to measure voltages up to ±40V. You can select the voltage range (±5V, ±15V or ±40V) in software; a smaller range results in higher precision. This Phidget also has an automatic mode that continuously adjusts the range based on present voltage measurements, so you'll always have the most accurate measurement possible. The VCP1001 connects to a port on a VINT Hub.
Isolated for Stability
This Phidget is electrically isloated, so a power surge on the circuit you're measuring will not damage your VINT Hub or your computer. Isolation also improves stability by eliminiating potential ground loops.