The GraLab 451R Darkroom Timer (GR451R) is a solid state, digital timer.
It has two, independent, programmable memories for single cycle switching, or, utilizing the auto-start feature, for continuous cycling. The GraLab 451R is 100% solid state for digital accuracy and repeatability. It has a simple design with highly visible, two-digit LED display, and timing knobs that makes setting time as easy as a kitchen timer. The three countdown time ranges are minutes up to 99, seconds up to 99 and tenths of seconds up to 9.9. The three audio signal choices are off, metronome and end-of-cycle tone.
The model 451 has a durable plastic case with rubber base pads and wall mounting keyholes in the back.
Please note: This timer is unable to be set at fractions of a minute, over 99 seconds.
Replaces the Gralab 450R Timer