mV is the abbreviation for millivolt, a unit of electrical potential equal to one thousandth of a volt, used to express small signal and sensor voltages.
The millivolt expresses voltage at a fine scale, with one thousand millivolts making up a single volt. This unit is well suited to the small voltages found in signal, sensor, and instrumentation circuits, where levels are far below the volts used in power circuits. Working in millivolts allows these small potentials to be specified and measured precisely.
Many low-level signals, including those from microphones, sensors, and thermocouples, operate in the millivolt range, where even small amounts of noise can be significant relative to the signal. This makes clean, shielded cable important for circuits carrying millivolt-level signals, since interference picked up at this scale can degrade the information the signal carries.
In commercial and industrial systems, understanding voltage at the millivolt scale supports the proper handling of low-level signals. Recognizing how small these voltages are underscores the importance of preserving them through quality connections and shielding.
Because noise picked up at the millivolt level can rival the signal itself, shielded, low-noise cable is essential for these circuits, preserving the small voltages from sensors, microphones, and thermocouples on which both measurement accuracy and audio quality will ultimately come to depend.
At Windy City Wire, the focus on shielded, low-noise low-voltage cable supports the circuits that carry millivolt-level signals. Supplying cable that rejects interference helps preserve small signals across sensor, instrumentation, and audio applications in commercial systems.
mV (millivolt)