CD121 is a conventional smoke detector, adopted non-polarity 2-Wire technology. The design incorporates a highly integrated 8 bit
professional MCU which provides powerful analysis & judgment capacity and reliability. Apply to the place wher e can not
install smoke detector.
Smoke Sensitivity | A1S:60°C A1R:8.5°C/Minutes |
Ceiling Spacing | cover radius is 6m (storey height less than 6m) |
Reset Voltage | less than 5 volt |
Reset Time | less than 2 second |
Alarm Indicator | LED continuously emitting red light |
Operating Temperature | -10°C to 55°C |
Storage Temperature | -20°C to 70°C |
Humidity | 0 to 93% RH, no condensation or icing |
Dimensions | 106mm (dia.) x 35mm (ht.) with base |
Weight | 80g/set with base |

Product Specification:
Model | 2/4 wire | Voltag e DC (Min./Max.) | Standby Current (Min./Max.) | Alarm Current (Min./Max.) | Surge Current (Max.) | Start-up Time (Max.) | Base Model No. |
CD120 | 2 | 10~33V | 80~95μA | 27~34mA | 135μA | 20 Secs. | 12B1 |
• 2-wire (without Remote LED output).
• Easy installation.
• Wide voltage range, and stable output.
• Sleek low-profile housing design.
• Advanced detection and smoothing algorithms.
• Low cost, high performance.
• Reliable early warning of a fire condition.
• Five-year limited warranty.
• Durable sensor head, no need for replacement.

