ED300 is a smoke and temperature detector.

The detector combines smoke and temperature detection to provide (depending on the mode of use) exceptional sensitivity to detect any type of outbreak (critical outbreaks such as flammable liquid fires with low smoke emission) or very high rejection of false alarms.

The operating mode can be set directly from the control unit by choosing from the following:

- PLUS" mode (factory-set): the detector signals the alarm if the smoke threshold is exceeded (settable as for ED100) or if the temperature threshold is exceeded (settable as for ED200); moreover, in case of temperature increase, the sensitivity of the smoke detection is increased to the maximum. This mode of operation, characterised by a very high sensitivity, makes it possible to detect even the most critical fire outbreaks (e.g. combustion of alcohol or similar liquids).

- OR" mode: the detector signals an alarm if the smoke threshold is exceeded (settable as for ED100) or if the temperature threshold is exceeded (settable as for ED200). This operating mode, characterised by a discrete sensitivity, allows detection of both fires with smoke emission and little heat (e.g. brooding fires) and fires with little smoke emission and high heat generation (e.g. chemical substance fires).

- AND" mode: the detector signals an alarm only if both smoke and temperature thresholds are exceeded at the same time (settable as for ED100 and ED200). This operating mode, characterised by low sensitivity, allows the incidence of false alarms to be reduced to a minimum. Given the low reactivity of this operating mode, the conditions must be carefully evaluated before its use.

- SMOKE" mode: the detector behaves like an ED100.

- TEMPERATURE" mode: the detector behaves like an ED200.