| Specification | R816 | R826 | R836 |
| Temperature Range | 0℃~45℃ | 0℃~45℃ | |
| Air Veiocity Meauring Range | 0.3~45m/s | 0.3~45m/s | 0.3~45m/s |
| Wind volume Range | 0~999900m3/min | 0~999900m3/min | 0~999900m3/min |
| ℃/ F Selection | √ | √ | |
| Accuracy of temperature | ±2℃ | ±2℃ | |
| Accuracy of Air Velocity | ±5%±0.1dgt | ±3%±0.1dgt | ±3%±0.1dgt |
| Auto Power Off | √ | √ | √ |
| Air Veiocity Unit | M/s,Ft/min,Knots | M/s,Ft/min,Knots | M/s,Ft/min,Knots |
| km/hr,Mph | km/hr,Mph | km/hr,Mph | |
| Back light | √ | √ | √ |
| Max/Min Air Veiocity Measuring | √ | √ | √ |
| Average And Air Veiocity Measuring | √ | √ | √ |
| Resolution | 0.1m/s | 0.1m/s | 0.1m/s 0.2℃ |
| Data Hold Function | √ | √ | |
| General Characteristics | |||
| Power | CR2032 3.0V | 9V Battery | 9V Battery |
| Product Weight | 52g | 240g | 240g |
| Product Size | 105mmx40mmx15mm | 170mmx160mmx49mm | 170mmx160mmx49mm |
Source: https://www.meterstesters.com/products/digital-anemometers/air-flow-anemometer-r826.html