Technical Specifications
| Model | HETTHDL-238 |
| CO₂ Measuring range | 0~5000 PPM |
| CO₂ Measurement Accuracy | ≤ ±3% |
| CO₂ Resolution | 1 PPM |
| Record interval | 10 s ~ 24 h |
| Record Volume | 43,000 |
| Temperature | (–20~70°C) ±1°C |
| Relative Humidity | 0.1% resolution, 0~100% RH range, ±5% RH accuracy |
| Refresh Interval | 10 to 240 seconds adjustable |
| Sensor Type | British import CO₂ sensor, Switzerland import temperature/humidity sensor |
| Battery | Two 3.6V lithium batteries |
| Communication Interface | USB |
| LCD Size | 40 × 27.8 mm |
| Weight | 176 g |
| Size | 108.6 × 90.8 × 35.8 mm |
| Accessories | PC software, specifications, professional USB link cable, two 3.6V lithium batteries |
