Nittan ST-I ionisation smoke detector

Technical Specifications:

• Detector Type: Ionisation smoke detector
• Sensing Element & Principle:  Dual ionization chamber , 33 k Beq, (0.9 Ci Americium 241)
• Supply Voltage: 24V dc nominal (range 16V to 30V)
• Voltage Ripple: 20% maximum
• Alarm Voltage: 5V d.c.between +(terminal 3) and - (terminals 1,6) at 25°C
• Monitoring Current: 40 Amps max. at 24V D.C.
• Alarm Current: 65 mA. maximum
• Charging Time: 20 seconds maximum
• Ambient Temperature Range:  -10°C to +50°C