The ESL-20 has been replaced by the new and improved ESL-200. Please click here to view the new model 
Measuring Range: 6 - 120,000 FPM
The brightest, fully featured LED strobe in a trim, efficient design. The ESL-20 series LED stroboscope incorporates 96 separate high-powered LEDs designed to measure the speed of rotating or cycling linear motion objects without contact or reflective tape, as well as freeze motion visually. 
Using a rugged aluminum housing and the latest technology, it’s compact size, NiMH rechargeable battery and lifetime LED lights make it a perfect choice for use anywhere on the factory floor. The ESL-20 is ideal for speed, motion and vibration analysis, such as rotating shafts, fans, cams, etc
- Store up to 19 flash rates in memory for records or quick retests (Restarts at the last flash rate)
- Power-SAVE feature automatically turns off the LEDs if no user-changes are detected on the keypad (can be disabled if desired)
- Operates from internal NiMH Battery or via external AC-Adapter (provided)
- Push button operation with x2 and ÷2 buttons for easy and precise adjustment along with phase shift
- NIST-Traceable Calibration Certificate provided
- Battery runtime of approx. 10 hours on a single charge. Supplied with an automatic charging system that prevents overcharging and damaging the battery
- 350 Lux brightness (measured at 6000 fpm at a distance of 50 cm)
- 2 year warranty
- Includes an external trigger input for flash control via an external sensor or controller as well as a trigger output
- ET-1 External Trigger Kit is optionally available includes external sensor and AC-Adapter for auto synchronization of strobe
at 30 cm Distance, 6000 flashes/min (FPM)
Supplied in foam-fitted carrying case with LED Stroboscope, AC-Adapter/Charger, instruction manual and NIST-Traceable Calibration Certificate.
The External Trigger immediately synchronizes the stroboscope with a rotating object. The sensor is aimed at a ferrous target mounted on the drive shaft and triggers the strobe to flash each time the target passes the sensor. ET-1 is complete with sensor, cables and AC adapter. Ferrous target not-included| Measuring Range | 6.0 - 120,000 fpm/rpm |
| Light Source | 96 LED Array, never needs replacement |
| Brightness | 350 Lux brightness (measured at 6000 fpm at a distance of 50 cm) |
| Accuracy | ±0.007%, ±1 LSD |
| Resolution | ±0.1 fpm/rpm (6.0 to 9999.9 fpm/rpm) ±1 fpm/rpm (10000 to 120000 fpm/rpm) |
| Display | 12mm high, 5digit LCD |
| Power | NiMH Rechargeable battery |
| Battery Life | 10 hours (@ 6,000 rpm when fully charged) |
| Charge Time | 6 Hours with overcharge protection |
| Operating Temp | 32° to 113° F (0 to 45° C) |
| Weight | 1.2 lb/540g |
| Housing Material | Aluminum |
| Tripod Mount | 1/4-20 UNC on backside |
| Phase Shift | 0-359° in 1° increments |
| Flashrate Adjust | COARSE: press "x2" or "÷2" FINE: press "v" or "^" |
| Synchronous Output | NPN Open collector 30V, 10mA max., 100 µs pulse width |
| Synchronous Input | Low level: 0~0.8VDC, High level: 2.5-30VDC, or use with NPN open colector output, 50 µs minimum pulse width, negative edge trigger |
| Warranty | 2 years |
