The Wheatstone Bridge Isn’t the Only Bridge

While there are different kinds of electrical circuits that load cells use, the most common configuration is known as the Wheatstone Bridge. One of our earlier blog posts (found here) discussed the Wheatstone bridge in detail. The Wheatstone Bridge configuration is the most popular, but there are a number of lesser-known bridges used in load cells as well. Most of these are simply alterations of the standard design, but they offer alternatives for different levels of resistance. Here is a look at some of the other popular bridge configurations:


Carey Foster Bridge. The Carey Foster Bridge is an electrical circuit that can be used to measure low resistances, or small differences between two larger resistances. It follows the same basic principles as the Wheatstone Bridge, but has a higher level of sensitivity.


Kelvin Bridge. The Kelvin Bridge is useful for measuring low values of resistance in industrial applications. This is a capability the Wheatstone Bridge does not have.


Kevin-Varley Divider. The Kevin-Varley Divider configuration is used to divide voltages and generate precise output data. It’s essentially a precise digital to analog converter.


Maxwell Bridge. The Maxwell Bridge is an AC bridge, meaning it has a balance detector and four arms. This configuration is useful for measuring the wide range of audio frequencies.


At Cooper Instruments & Systems, we offer a number of different load cells for various applications. Our load cells are made from quality materials for durability and reliability. Contact us today to find out how we can provide load cells for your business.