The Rigol DP811 is a high-precision programmable linear power supply from the DP800 series, designed for laboratory and industrial applications. It features a single output with two ranges: 0–20 V/10 A and 0–40 V/5 A, allowing flexible configuration depending on the task. The maximum output power is 200 W. The unit delivers low ripple (< 350 µVrms / 3 mVpp) and stable output thanks to its linear architecture. Operation is controlled via a 3.5" TFT color display, with USB, LAN, and RS-232 interfaces (on the DP811A model). Built-in OVP, OCP, and OTP protections ensure safe operation with sensitive loads. Suitable for educational labs, service centers, research institutions, and manufacturing environments.