Understanding Thermal EMFs in Reed Relays
This short video explains the presence of thermal electromotive force (EMF) voltages within reed relays.
In applications, where very low signal levels are present or very low offset voltages, are required, thermal EMF voltages generated across the reed switches can introduce unacceptable errors where accurate measurements are important.
Understanding how thermal EMF voltages are generated, what affects the amplitude and the best way to use reed relays where this is critical, will help the user to select the best relay for their application.
Want to learn more about Pickering’s unique relay construction techniques?
To learn about formerless coil winding and SoftCenter™ technology click here.
Looking for additional information on reed relay technology?
Pickering has published an educational book, the Reed RelayMate, which provides an overview of how reed relays work, how they are constructed and how to interpret their specifications and make best use of them in their applications.
Contents include:
- Reed relay basics
- Comparing reed relays with other relay technologies
- Packaging reed relays
- Manufacturing test of reed relays
- Choosing a reed relay
- Placing and driving a reed relay coil
- Loading reed relays
- Understanding specifications
- Relay terminology
To view or download your free copy click here.
If you found this video helpful / interesting please take a look at our other useful videos which can be found here.
About Pickering Electronics
Pickering Electronics was formed over 50 years ago to design and manufacture high quality reed relays, intended principally for use in Instrumentation and Test equipment. Today, Pickering’s Single-in-Line (SIL/SIP) range is by far the most developed in the relay industry with devices 25% the size of many competitors. These small SIL/SIP reed relays are sold in high volumes to large ATE and Semiconductor companies throughout the world.
Pickering Electronics is part of the privately-owned Pickering Group; made up of three electronics manufacturers, including Pickering Interfaces who design and manufacture modular signal switching and simulation products, and Pickering Connect who design and manufacture cables and connectors.
