TH0240 Resistance Multiplexer

Electrical Calibration Standards

The TH0240 is a precise resistance channel-switch device that integrates ultra-sensitive, high-efficiency, polarized sealed relays, eliminating the self-heating effect in the relay. TH0240 improves efficiency by removing the need to continually change leads when measuring groups of resistors. Designed for high-precision laboratories and calibration environments, this device allows seamless switching between multiple resistor channels while maintaining exceptional measurement accuracy. Its four-terminal wiring and tellurium copper terminals ensure minimal contact resistance and reduced thermal EMF, making it ideal for high-stability resistance measurements. TH0240 supports 10 input channels with a single output channel, allowing users to easily measure or calibrate a series of resistors without the need for manual rewiring. The low noise and error contribution of < 20 nV, combined with a maximum switching current of 3 A @ 30 V DC, make it suitable for both sensitive low-current measurements and higher-power applications. Additionally, the device comes equipped with RS232 communication interface, providing easy integration into automated test setups and data acquisition systems. Its robust design and wide operating temperature and humidity range make it reliable for long-term laboratory use.