| Model | 7731 | 
| CO2 Range | 200~9999 ppm | 
| CO2 Resolution | 1 ppm | 
| CO2 Accuracy | ±40 ppm ±3% of reading 400~2000 ppm, Other range is 10% of reading | 
| CO2 Response Time | <5 mins (90% step change) | 
| CO2 Warm-up Time | 10 Seconds | 
| Air Temperature Range | 0~50℃, 32~122! | 
| Air Temperature Resolution | 1℃, 1! | 
| Air Temperature Accuracy | ±1℃, ±1! | 
| Air Temperature Response Time | <2 mins (90% step change) | 
| Humidity Range | 5~95% RH | 
| Humidity Resolution | 1% RH | 
| Humidity Accuracy | ±5%RH (at 25℃, 10~90%RH); others ±7%RH | 
| Humidity Response Time | <20 mins (90% step change) | 
| Operating Temperature | 0~50℃ | 
| Operating RH% | 0~95% RH (avoid condensation) | 
| Storage Temperature | -20~50℃ | 
| Storage RH% | 0~95% RH (avoid condensation) | 
| Power Supply | 100~240VAC, 50~60Hz, 1.5VA or 5VDC | 
| Power consumption | <2W | 
| Dry contact | Normal open, loading: 5A@120VAC; 5A@250VAC; 5A@28VDC | 
| Buzzer | ~ 70dB at 10cm distance | 
| Meter Size | 86(L) * 86(W) * 51(H) mm | 
| LCD Size | 77(H) * 46(W) mm | 
| IP | IP30 | 
| Housing Material | ABS | 
| Mounting Height | 1.4~1.8 M | 
| Weight | 150 g | 
| Standard Package | Meter, Manual, Paper box | 
 Malaysia
Malaysia