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DLG temperature compensating development darkroom timer


The Compensating Development Timer will help take the hit-and-miss out of timing the development of photographic film and paper under off-nominal temperature conditions. By measuring the temperature of the developing solution continually during development, and adjusting the timer rate accordingly, correct development is assured even as temperatures vary during development.

The Temperature-Compensating Development Timer is designed to be extremely simple and intuitive to use. It is simply a digital stopclock, which runs at a rate dictated by the temperature of the developer solution.

- Optimized for use in the darkroom
- Large, clear, LED display
- Illuminated run/reset switch
- Display illumination safe-light red
- Clear, high contrast panel legends
- Selection controls are rocker switches - easy to determine settings by touch in total darkness
- Display has bright, dim and off modes - "dim" mode designed to be visible in near-darkness with minimal fogging risk on sensitive emulsion. "Off" mode blanks the display completely (timing beep in "off" mode" at thirty second intervals)
- Chemical-resistant fascia, rear printed on clear polyester for durability
- High Performance:
High-precision stainless-steel thermistor temperature sensor
10-bit analogue-to-digital conversion
High performance digital processor
Computations carried out to 0.1 deg. C resolution
Wide operating temperature range from zero to 54 deg. C.
-Implemented temperature co-efficient 2.5 (equivalent to using Ilford tables). Can be supplied with alternative coefficients implemented at a small charge.
-Provides temperature display (digital thermometer mode) when timer not running
-Battery-powered (2xAA - not included due to shipping rules)
-High Efficiency LED displays provide long battery life (>1000 hours with display "dim")

Includes all the accessories listed bellow:

The Compensating Developing Timer Unit.

Temperature Sensor Probe, a precision stainless-steel thermistor with 1m connecting cable terminated in a 3.5mm jack connector. Cable can be extended using a male-to-female 3.5mm stereo (three-pole) jack lead.

Foot Switch for compensating developing timer. Switch duplicates the function of the "run-reset" button on the timer and allows hands-free operation. Fitted with 2m connecting cable terminated in a 3.5mm jack connector. Cable can be extended using a male-to-female 3.5mm stereo (three-pole) jack lead.

Wall Cradle for the Compensating Developing Timer, includes wall fixings. Allows drop-in, lift-out of the timer.

Sealing Gland, allows temperature sensor to be sealed into a tank cover, permitting inversion agitation with the sensor fitted. Requires half inch / 12mm hole.

Instruction Booklet - 10 pages.
Tray Clamp for Compensating Developing Timer, holds sensor to tray for tray developing. Acetal plastic with nylon screw.
Clamp secures to tray with clamp screw, sensor drops in through hole in clamp.