Sato Sigma II NSII-Q Thermohygrograph
See how room conditions change over time. The Sato Sigma II records temperature and relative humidity together on a rotating paper chart, making it easy to review trends and retain a physical record. The transparent cover keeps the chart visible during operation.
Choose Your Model
| Model | Temperature range | Humidity range | Best fit |
| 7210-00 |
−15 to 40°C |
0 to 100% RH |
Locations that need the lower temperature scale |
| 7211-00 |
−10 to 50°C |
0 to 100% RH |
Locations that need readings up to 50°C |
Before ordering: Select the instrument model above. The two models use chart paper with different printed temperature scales.
Recording and Specifications
| Recording periods |
Selectable 1, 7 or 32 days; use chart paper for the selected period |
| Temperature sensing |
Bimetallic strip |
| Humidity sensing |
Human hair bundle |
| Temperature accuracy |
±1°C from 10 to 30°C; ±2°C elsewhere within the measuring range |
| Humidity accuracy |
±3% RH from 20 to 95% RH at 15 to 25°C; ±5% RH under other specified measuring conditions |
| Minimum chart divisions |
1°C and 1% RH |
| Power |
Two C-size batteries |
| Dimensions |
336 W × 295 H × 148 D mm |
| Weight |
Approximately 3.1 kg, excluding batteries |
Matching Chart Paper
Order replacement charts by both model and recording period. The charts for 7210-00 and 7211-00 have different temperature scales.
Need a replacement cartridge pen? Shop Sato recording pens →
What Comes with the Instrument
Sato lists 55 sheets of the matching 7-day chart, two C-size alkaline batteries and an instruction manual as standard accessories. Extra charts and replacement pens can be ordered separately.
For the full model comparison and further reading, visit the Sato NSII-Q main product page →.