| CM4200 | CML4255 | CML4275 | |
| Temperature alarm | ✓ | ✓ | ✓ |
| Number of temperature sensor inputs | 1 | 2 | 2 |
| Logging of temperature values (in portal) | ✓ | ✓ | |
| Number of dry inputs (NO/NC) | 2 | 2 | 2 |
| Alarm after activated (NO/NC) input | ✓ | ✓ | ✓ |
| (Open collector) ouput | ✓ | ✓ | |
| Ability to run battery-operated | ✓ | ✓ | ✓ |
| Alarm after power failure | ✓ | ✓ | ✓ |
| Local display of actual values | |||
| Audible alarm indication on site | ✓ | ✓ | |
| Industrial (outdoor) enclosure IP66 | ✓ | ||
| Option for “smart data transfer” | ✓ | ||
| Option to sum “heat hours” in period | ✓ |