Available. The Turck MS25-UI is a single-channel rotation speed monitor designed to convert digital input frequencies into proportional analog current or voltage signals. Operating within a monitoring range of 10 mHz to 1,660 Hz (0.6 to 100,000 min⁻¹), it accommodates NAMUR sensors, 3-wire PNP sensors, or other voltage sources with pulse levels between 5 and 30 VDC. The device offers both current (0/4–20 mA) and voltage (0–10 V) outputs, with the current output configurable for 0–20 mA operation. Features include wire-break and short-circuit monitoring, removable terminal blocks, excellent temperature stability, pulse output, floating averaging for signal steadying, complete galvanic isolation, and input reverse-polarity protection. The MS25-UI is housed in a compact DIN rail mountable enclosure measuring 75 x 50 x 110 mm and weighs 238 g, making it suitable for various industrial applications requiring precise speed monitoring and control.