Lutron Electronics Co., Inc. DT2240D Digital Tachometer

The Lutron Electronics DT2240D Digital Panel Tachometer provides precise RPM readings on a panel-mounted, 4-digit, high-brightness red LED display (14.3 mm/0.56 in). It accepts input from proximity or photo sensors and covers a measuring range of 5 to 99,990 RPM with a resolution of 0.1 RPM (5–999 RPM), 1 RPM (1,000–9,999 RPM), and 10 RPM (10,000–99,990 RPM). With an accuracy of ±0.05% of reading plus 1 digit and a 1-second sampling time above 60 RPM, it’s suitable for conveyors, electric motors, pumps, fans, production equipment, packaging machinery, and other industrial automation systems requiring real-time speed indication. The unit operates from 110/220 VAC, 50/60 Hz (230 VAC selectable), is designed for panel mounting, and serves as a dependable speed monitor and display for process control and machine diagnostics; common replacements include the Red Lion CUB5T Tachometer and Omron K3HB-R Rotary Pulse Indicator.