Thurlby Thandar Instruments (TTi) is a leading British manufacturer of electronic test and measurement equipment, founded in 1989 through the merger of Thurlby Electronics and Thandar Electronics. Headquartered in Huntingdon, Cambridgeshire, UK, the company designs and produces a wide range of precision instruments for R&D, education, service and production applications. Its core product portfolio includes high-performance DC power supplies, such as the PL and QL series, offering programmable and high-precision outputs. The company also offers a comprehensive range of function generators and arbitrary waveform generators, including the TG series, known for frequency accuracy and modulation capabilities. TTi’s precision digital multimeters, notable for 5½ and 6½ digit resolution, deliver laboratory-grade measurement performance. Frequency counters and timer/counters, like the TF series, provide high-speed and high-resolution measurements up to microwave frequencies. The firm manufactures programmable electronic loads for power supply testing and battery simulation. TTi has earned a reputation for robust, affordable instruments with excellent technical support, competing effectively against larger global brands. Its products are widely used in aerospace, automotive, telecommunications and educational institutions worldwide. With a strong focus on innovation and British manufacturing, TTi maintains a significant presence in the global general-purpose test equipment market, recognized for reliability and ease of use.