GD204 is a plug-in combustible gas and carbon monoxide (CO) detector with a large LCD screen that shows gas concentration, CO level, temperature and humidity in real time. It is powered directly from AC 100–240 V, uses a long-life 5-year sensor, and provides loud sound & light alarms when gas or CO reach dangerous levels.
Product Description
The GD204 is a plug-in combustible gas and CO detector designed for continuous monitoring of household and light-commercial environments. Powered directly from AC 100–240 V, it requires no batteries and features a large, easy-to-read LCD that simultaneously displays gas %LEL, CO ppm, temperature and humidity.
Using dedicated sensors for CH₄ / LPG and carbon monoxide, the detector provides real-time concentration reading and a multi-color bar graph to show gas level at a glance: green for safe, yellow and orange for rising concentration, and red when the alarm threshold is reached. When CO exceeds 300 ppm or gas exceeds 3000 ppm, the unit triggers a >85 dB sounder, flashes the red alarm LED and highlights the current value on the display.
A 200-second automatic pre-heating period ensures stable operation after power-up, while the integrated fault LED helps indicate sensor or system errors. With an estimated 5-year sensor life, low power consumption and clear visual feedback, the GC03 is an ideal choice for kitchens, boiler rooms, gas-appliance areas and other locations where reliable gas and CO monitoring with temperature and humidity indication is required.
Detects combustible gas (CH₄ / LPG) and carbon monoxide (CO)
Plug-in design, powered by AC 100–240 V, 50–60 Hz
Large LCD shows GAS %LEL / CO ppm + temperature & humidity
Status indication with power (green), alarm (red) and fault (yellow) LEDs
Built-in buzzer alarm >85 dB
Approx. 5-year sensor life
Multi-color gas level indication: green / yellow / orange / red
Sound and light alarm with real-time concentration display
Automatic pre-heating – normal monitoring starts 200 s after power-on
Temperature display (°C / °F)
Humidity display (%RH)
Gas and CO concentration display (ppm & %LEL bar graph)
Power indicator light – green
Alarm indicator light – red
Fault indicator light – yellow
TEST button
Internal buzzer
| Item | Specification |
|---|---|
| Product Name | Combustible Gas & CO Detector |
| Model | GD204 |
| Sensor Life | 5 years |
| Operating Voltage | AC 100–240 V, 50–60 Hz |
| Power Consumption | < 3 W |
| Item | Specification |
|---|---|
| Measuring Range | 0–8000 ppm |
| Green Level | < 1000 ppm (< 2% LEL) |
| Yellow Level | 1000–2000 ppm (2–4% LEL) |
| Orange Level | 2000–3000 ppm (4–6% LEL) |
| Red Level | > 3000 ppm (> 6% LEL), alarm within 30 s |
| LCD Indication | Bar graph with multi-color segments (green/yellow/orange/red) |
| Item | Specification |
|---|---|
| Measuring Range | 0–999 ppm |
| Item | Specification |
|---|---|
| Temperature Measuring Range | 0–100°C / 32–212°F |
| Operating Temperature | –10°C ~ +55°C |
| Humidity Measuring Range | 0–99% RH |
| Operating Humidity | < 95% RH, non-condensing |
| Item | Specification |
|---|---|
| Alarm Method | Sound and light alarm with LCD indication |
| Alarm Volume | > 85 dB |
| Alarm Condition | CO concentration > 300 ppm, or GAS (CH₄ / LPG) concentration > 3000 ppm |
| Alarm Indication | Red LED flashes, LCD shows current gas / CO value |
| Item | Specification |
|---|---|
| Pre-heating Time | Approx. 200 s after power-on; no detection function during this period |
| After Pre-heating | LCD shows “000 ppm” for gas, green GAS bar flashes, real-time temperature & humidity displayed |
