HM/PSE or HM/PSE-AP

The Honeywell HM/PSE (and HM/PSE-AP variant) from Morley-IAS is an addressable optical (photoelectric) smoke detector designed for early detection of smoldering fires, using advanced chamber design and filters to minimize false alarms from dust or contaminants.
It features dual integral red LEDs for 360° visibility, plug-in design for the MI/B501AP/IV base, and embedded software algorithms for fast, reliable response; the -I version adds short-circuit isolation.
Key Specifications
Feature
Details
Detection
Optical smoke (sensitivity levels 1-5%/ft obscuration) 
Voltage
15-32 VDC 
Standby Current
260 µA @24V (no comm); 310 µA (LED blink) 
Temperature
-30°C to +70°C (max ambient 50°C) 
Humidity
10-93% RH non-condensing 
Dimensions/Weight
Ø102 x 52mm (H); 97g (without base) 
Certifications
EN54-7; LPCB approved