DI-3 (Ion): Left
DP-3 (Photo): Right. Pretty sure this is just the photoelectric version of the DI-3
Very nice: those kinds of detectors are very rare to find I’m sure! (especially the DP-3 which I don’t think I’ve ever actually seen before! Interesting how the DP-3 actually has lettering on it that’s in both English & French: the only company that I think really did that back in the day as standard was Edwards (obviously though only on the devices they made for the Canadian market specifically).
Considering the “I” in “DI-3” likely means “ionization” & the “P” in “DP-3” likely means “photoelectric”, that would make perfect sense.
Me neither. The DI-3 however yeah, I’ve seen it plenty of times, so while that ain’t rare, it sure falls under the “uncommon” section where these devices are beginning to be phased out due to more and more systems being upgraded/replaced over the course of time; another reason why it’s so hard to find certain types of alarms/alarm systems.
Yeah. I actually didn’t realize until just now that both of the detectors in the above photo are the other version of each one despite being different design-wise (since sometimes detectors are identical to each other even if they have different kinds of detection methods).
The fun thing with the DP-3, I can’t find any documentation from Cerberus actually mentioning it. I only know that it’ll fit on the DB-3S base because of very obvious visual cues (it’s not even mentioned in the DB-3S’s manual). Clearly quite rare.
Oooh very nice! I need to get more Cerberus pyrotronics equipment
More reason to believe that red-lensed 2903s exist…