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GraLab Model 300 Electro-Mechanical Darkroom Timer

BH #GR300 • MFR #GR300
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GraLab Model 300 Electro-Mechanical Darkroom Timer
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GraLab 300 Overview

Even in total darkness you can read the minutes and seconds on GraLab's Model 300 Darkroom Timer. It is used in industrial/commercial photo labs, graphic arts, printing, hobbyist darkrooms and is probably the most popular darkroom timer of all time.

Set by seconds, minutes or a combination of the two, GraLab's exclusive dual-cam system gives you exact timing over long intervals.

Two, three-wire receptacles can control an enlarger or printer and safelight with a combination time/focus switch.

Rubber base pads, wall mounting keyholes and a recessed hand grip on the 7-1/2" x 7-1/2" x 2-1/2" polycarbonate case give you multiple placement choices.

Plastic boot over power switch prevents corrosion from chemicals or water
Buzzer automatically signals end of cycle
Large 6.5" diameter face with easy-to-read glow in the dark numerals
Three wire grounded cord
Model 300 withstands high impact, resists chemicals and moisture, and is electrically nonconductive.
UPC: 782365000368

GraLab 300 Specs

Number of Outlets
Two
Audible Options
Buzzer automatically signals end of cycle
Foot Switch
No
Voltage
120V/60Hz (Available in 220v/50Hz)
Dimensions
7.5 x 7.5 x 2.5" (191 x 191 x 63.5 mm)
Weight
Not available
Packaging Info
Package Weight
2.6 lb
Box Dimensions (LxWxH)
12.047 x 9.291 x 5.354"

GraLab 300 Reviews

50 years old and it still works

By Robert
Rated 5 out of 5
Date: 2025-05-06

Just reading the low reviews and can't believe they were actually written by carbon based life forms. My unit has the toggle switches and I use the rheostat switch in the lower right of the unit to control the 'buzzer'!

One Word: Plastics.

By Eduardo
Rated 4 out of 5
Date: 2021-05-13

I much preferred the metal enclosures available before I graduated.

See any errors on this page?

Are the two outlets one normally on and the other ...

Are the two outlets one normally on and the other one normally off, each switched by the timer?
Asked by: David
It used to be one plug-in was for the enlarger and the other plug-in for the safelight.
Answered by: S R
Date published: 2022-07-23

Hi, This is about the Gralab 300 timer. the one I ...

Hi, This is about the Gralab 300 timer. the one I currently own looks exactly like the one pictured here. It has a volume/on/off control knob on the front. Yet 4 or 5 reviewers said there was no way to control buzzer volume or to turn this feature off. Which is it? Can the buzzer on this current model be set to off? Can the volume be controlled? Does it have the buzzer control knob as shown in the photos? Thanks.
Asked by: Bruce E
We inspected a unit physically at the store and it is exactly as depicted online; there is a physical knob for buzzer volume on the face of the Gralab Model 300 darkroom timer.
Answered by: Jeremy
Date published: 2024-09-23

What is the difference between this timer and the ...

What is the difference between this timer and the 300S? I cant tell a difference. No good way to compare.
Asked by: Lisa
The GraLab 300x is the 210-250VAC version of the GraLab 300, which operates on 120VAC.
Answered by: Boyd H
Date published: 2021-05-03

Can this connect to a ballast required enlarger? ...

Can this connect to a ballast required enlarger? The Opemus 5 to be exact?
Asked by: Devon
The Gra-Lab timer can be used to time any item that has a standard house hold plug.
Answered by: Dan W
Date published: 2020-11-12

IS THIS ITEM WORKS WITH THE EUROPE AC POWER?

IS THIS ITEM WORKS WITH THE EUROPE AC POWER?
Asked by: Alessandro
The Voltage, on this GraLab Model 300 Electro-Mechanical Darkroom Timer would be - 120V/60/Hz.
Answered by: Moe
Date published: 2022-09-23
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