On 07/04/2018 02:44 PM, Wade Garrett wrote:

[snip]

That's determined by Whether it uses photoelectric or ionization
technology. The former is better detecting fast flame, the latter
smoldering fires.

I have had battery-operated (9V) units containing both types of detectors.

[snip]

--
Mark Lloyd
http://notstupid.us/

"My computer said to "Insert disk #3" but I couldn't get more than one
disk fit in at a time!"