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Gralab 451R Darkroom Timer

Model: 451718
Manufacturer: GraLab

In Stock

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.


  • Built-in metronome
  • Backlit keys
  • Table or Wall mountable
  • One outlet
  • Time range can be set in whole minutes up to 99, whole seconds up to 99 and tenths of a second up to 9.9
  • Three Audible Options:
    • end of cycle tone, once every second or none at all

Replaces the Gralab 450R Timer

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