SR865A - 4 MHz lock-in amplifier
Stanford Research Systems
The SR865A Lock-In Amplifier offers superb performance and outstanding value. It's what you’ve come to expect from a Stanford Research Systems lock-in amplifier. With 4 MHz frequency range, time constants from 1 µs to 30 ks, very low noise front-end amplifiers, and a modern, intuitive user interface, the SR865A is the ideal choice for any synchronous detection application.