Lock-In Amplifier (LIA) is a commonly used instrument for extracting weak signals from noise. It utilizes the cross-correlation detection principle between the signal under test and the reference signal to achieve narrowband processing of the signal, effectively suppressing noise components unrelated to the reference frequency, thereby enabling signal detection and tracking. LBTEK's lock-in amplifiers are based on an advanced programmable logic gate array and embedded system architecture, as well as leading low-noise analog circuits, achieving rich and powerful analog input and output functions. They offer advantages such as strong anti-interference capability, low acquisition noise, large dynamic range, and high temporal stability, and are widely used in fields such as physics, chemistry, biology, materials science, communications, and medicine. The lock-in amplifier supports the installation of more options. For details, please refer to the "Technical Specifications" page.