photo timer

photo timer

an alarm device for use in a darkroom to advise the need to move to the next stage of the developing program. More commonly used to control x-ray exposure time automatically for spot filming or photofluorography connected with the output optical detector.
References in periodicals archive ?
The infrared sensor allows rapid triggering, plus there's a time-lapse mode, programmable photo timer, and multi-shot photo capability of up to three shots per series with 15 seconds between each.
Lambert said he is now looking at adding photo timers, and when renovating the building, adding a more efficient heating and cooling system, with some passive solar and reflective roofing material, as well as a more efficient way to light the parking area.