Many U.S. government military and regulatory agencies specifically call out and/or reference these strobes. These products continue to be built and serviced in the Genrad tradition.

These stroboscopes are small portable flashing-light sources used to measure the speed of fast-moving devices or to produce the optical effort of stopping or slowing high-speed motion for observation.

Model 1531-AB - Compact and accurate. These strobes are small portable flashing-light sources used to measure the speed of fast-moving devices or to produce the optical eff ect of stopping or slowing high-speed motion for observation. A build-in system uses the power-line frequency for quick and easy checks and adjustment of the flashrate calibration. Each flash lamp/reflector assembly is hinged at the panel and the reflector swivels 360 degrees, for complete flexibility. The cases have standard sockets (0.25 x 20 threads/inch) for tripod mounting.

Model 1538-A - Versatile synchronization: A variety of trigger inputs can be used for flash synchronization. Contact closures, pulses, or sinewave signals will trigger the flash, and an output trigger is provided so the stroboscope, in turn, can trigger another device. Single-flash photographs of high-speed motion are a snap with any still camera.

The difference: The 1531 is more economical to buy. On the other hand, the 1538 gives you six times the maximum flash rate of the former, and enable portable operation with a rechargeable battery. The 1538-A can also be used with an optical extension lamp.

The 1531-P2 Flash Delay is a valuable asset to any stroboscopic or high-speed photographic application. The 1531-P2 flash delay synchronizes the strobe with rapidly moving objects and controls the flash, relitive to the position of the object, by introducing a variable time delay in the electrical path between the trigger source and the strobe.