惠斯通电桥（英语：Wheatstone bridge，又称惠斯同电桥、惠斯登电桥）是在1833年由塞缪尔·亨特·克里斯蒂发明，1843年由查尔斯·惠斯通改进及推广的一种测量工具。它用来精确测量未知电阻器的电阻值，其原理和原始的电位差计相近。

待测电阻，和已知电阻的可变电阻器、电阻和电阻。在一个电路内，将和串联，和串联，再将这两个串联的电路并联，在和之间的电线中点跟在和之间的电线中点接驳上一条电线，在这条电在线放置检流计。当时，电桥平衡，检流计无电流通过。由于是否有电流经过是十分敏感的，惠斯登桥可以获取颇精确的测量。

A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of a wheatstone bridge is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider). Its operation is similar to the original potentiometer.