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HC-202A Ionization Smoke Detector


Joint functioning way: NO type and NC type.

2.There are two LEDs which can turn 360o and
   watch the situation of the detector.

3.The use of common base is advantageous to
   the exchange of detector.
Functioning way

As there is smoke getting in the detector, the ion current will be decreased, making the voltage increase and touching the detector to function and send out alarm.  Meanwhile, the LED will be turned on automatically.  Under normal situation, the LED has monitoring function.  And as it functions, the LED keeps turning on continuously.  It is suitable for installation at the places like the entrance of staircase, corridor, lift hall, indoor room, etc.


Model No

HC-202A Ionization Smoke Detector

Overall structure

Adopted voltage



Fire-resisting ABS resin material

Monitoring electric current


Joint terminal

Copper rod (zinc-plated)
Functioning electric current 30mA


Fire-resisting ABS resin material.
Copper rod (zinc-plated)
Suitable temperature -15~60°C
Suitable humidity 0~95% RH Color Ivory
Size 134mm x 31mm Notes Prohibit from being installed at the places with large volume of smoke and steam lingering, and the inlet and outlet of cold and warm air.
Weight 125g
Provide the outside with the maximum value of signal input joint volume DC-30V 1A

General wiring drawing

The red wire is the power source (DC-12V)

The black wire is the signal source.

For point 3 and point 4, the NO type appears to be open all the time, and the NC type appears to be close all the time.

COMMON BASE | HC-306B | HC-202A | HC-601 | HC-307A | HC-207A | HC-407B | HC-206B | HC-406 | HC-407A