Time-O-Lite GR-90 Auto Reset, 60 Second Enlarging Timer.
Editorial Reviews — ... Product Description | This precision timer incorporates a push-button start with automatic reset. Times from 1 sec. to 60 sec. A toggle switch allows focusing of enlarger for extended periods of time. Luminous dial. May be wall or table mounted.Precision timer incorporates an accurate synchronous motor drive coupled with a simplified automatic reset timing mechanism. A toggle switch controls power to the load receptacle, permitting either timed or constant output. Features include luminous dial, chemical resistant...more

Gralab 655 Timer/Intervalometer
Feature: ... Extensive timing capacity...from .1 second to 59 minutes 59.9 seconds; Ability to count down or up; Ability to function as a stop watch; Display made up of 5 LED's...1/2' inch to report minutes, seconds and tenths of a second; Automatic reset feature with the capability to repeat a cycle over and over by pushing a single button ...more
Editorial Reviews — ... Product Description | Replacing the 545/645, the 555/655 are ready to go to work for you. These timers are excellent performers for timing kinetic experiments, start and stop times for gas chromatography, safety shutoff on critical equipment, centrifuges, x-ray equipment and quality control analysis. The 555/655 have an instantly repeatable time cycle, and these digital circuits react little to power line interference and none to frequency variations. The 555/655 series features:...more

Beseler Digi-Timer Enlarging Timer
Editorial Reviews — ... Product Description | Digital design features large LED readout with print "cancel" feature. Times from 0.1 to 99 seconds.Electronic timers with audible "metronome" tone. Suitable for use with all light sources, including those with inductive loads such as cold light heads. The timers can produce a "beep" every second to allow burning and dodging operations to be performed precisely. A switch on the timer allows for audible or silent operation. Dual time control with 10X range selector provides precise exposure...more

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