Time relay digital for photo printing "Sura-2".Time relays, timersThe digital time relay for photo printing "Sura-2" was produced presumably since 1991. The manufacturer is not installed. The Sura-2 time relay serves for accurate and stable processing of exposure during photographic printing, metering of the time of switching on of lighting devices and other similar purposes, has an additional mode of operation with sound indication for processing exposure during photo-laboratory processing of materials. The range of operating exposures is from 0.01 s to 10000 s. Exposure processing error ± 0.1%. No load power consumption 3.5W. The switched power is up to 500 W.