What is the TEK904 Enhanced Decade Resistance Box?
The TEK904 Decade Resistance Box is a compact substitution tool designed for calibration, fault-finding and education environments. Built with a strong housing and easy-to-use rotary switches, it allows precise resistance values from 1Ω to over 11MΩ, ideal for UK electricians, technicians and engineers needing a portable, lab-grade resistance box on site or in the workshop.
Whether you're simulating sensor outputs, verifying meter accuracy or carrying out R&D tests, the TEK904 delivers professional-grade performance in a no-fuss format.
How does the TEK904 stand out in daily use?
Unlike standard resistance boxes, the TEK904 includes a 7th decade for ultra-fine control starting from just 1Ω. A dedicated terminal also allows use as a precision potential divider, a smart feature for more advanced test setups.
Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on all orders
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
