Rotational speed sensor E21000

photoelectricthreaded

Model 21000E Speed Sensor Balancing Accessory PHOTOELECTRIC SPEED SENSOR FOR BALANCING DESCRIPTION: The Model 21000E photoelectric speed sensor is used with IRD balancing instruments to detect the rotating speed of a part. This speed sensor operates on a retro-reflective principle and requires reflective tape to be attached to the rotor. The optical system is coaxial and minimizes problems associated with ambient light. For best performance, the sensing axis of the photocell should be placed at a slight angle from perpendicular to the reflective tape. An indicator light on the side of the sensor tells when the sensor is being triggered by the tape. Two threaded mounting nuts are supplied. This sensor is furnished as a standard accessory with most IRD Balancing instruments. This is a direct replacement for all earlier versions of the 21000 speed sensor. GENERAL SPECIFICATIONS: • Sensing Distance: 25 - 610 mm (1 – 24 inches) • Speed Range: 10 to 500 000 RPM • Trigger Source: Reflective tape • Light Source: Visible red LED, axial • Indicator Light: Green LED on side (Light is on when triggered) • Output: TTL compatible pulse 0 volt (non- triggered) to +5 volt (triggered) into a10K ohm load. Trigger occurs on the leading edge of the reflective tape. (Note: Models 21000D and earlier trigger on the trailing edge) • Orientation: It is recommended that the axis of the speed sensor be placed at a slight angle (15 degrees) from perpendicular so that only a trigger from the reflective tape will be sensed. • Standard Accessories: (2) mounting nuts