- Simultaneously displays CO2, Temperature, Relative Humidity, Time and Date
- 3 status indicators (Good / Normal / Poor) change with CO2 concentration
- User programmable audible/visual CO2 alarms (Good (default 800ppm), Poor (default 1200ppm)) with disable
- CO2 Automatic baseline calibration for long term drift compensation
- NDIR (non-dispersive infrared) waveguide technology
- Real time calendar with date and time
- Min/Max records highest and lowest readings for CO2, Temperature and Humidity
- Data Hold freezes the reading on the display
- °F/°C selectable
- Includes AC adapter
| GSM200 | |
| Carbon Dioxide (CO2) | 0 to 9999ppm |
| Accuracy | ±75ppm or 5% of reading |
| Air Temperature | 23 to 122°F (-5 to 50°C) |
| Accuracy | ±2.7°F/1.5°C |
| Relative Humidity | 0 to 90.0%RH |
| Accuracy | ±5%RH |
| 3 Status Icons |
Good 0 to 800ppm Normal 800 to 1200ppm Poor >1200ppm |
| Automatic Baseline Calibration | Every 7 days |
| CO2 Alarm | Audible/Visual |
| Power | AC Adapter (included) |
| Dimensions | 4.6 x 4.0 x 4.0" (117 x 102 x 102mm) |
| Weight | 7.2oz (204g) |