● High sensitive response sensor
● Air volume calculation
● Instant / AVG/ 2/3V MAX flow measurement
● Wind speed unit selection: M/s ,Feet per minute,Section, km/hr,mph
● Data locking, the maximum and minimum values
● Manual data memory and read 99 pen function（TM-4001/4002）
● 3 digit LCD display 4
● Folding telescopic wind speed sensor
● Automatic logging 8000 pen (TM - 4003)
● To calculate the dew point and the wet bulb temperature (TM) - 4002/4003
● Atmospheric pressure measurement (TM - 4003)
| Range | Resolution ratio | Accuracy | |
| The temperature | -20~50℃ | 0.1℃ | ±1℃ |
| -4~122 | 0.1℉ | ±1.8℉ | |
| Humidity | 20~80%RH | 0.1 | ±3.5%RH |
| The atmospheric pressure | 350~1100 hPa | 0.1 hPa | ±2hPa |
| 263~825 mmHg | 0.1 mmHg | ±1.5 mmHg | |
| 10.3~32 inHg | 0.1 inHg | ±0.1 | |
| Calculate dew point/wet bulb temperature | |||
| Wind speed | 0.1 - 40.0 m/s | 0.01 m/s |
±3% Read the value or ±1% full scale alue |
| 0.02 - 144 km/hr | 0.1 km/hr | ||
| 0.12-89.5 MPH | 0.1 MPH | ||
| 0 - 7874.0 ft/min | 0.1 ft/min | ||
| 0.01 - 77.75 knots | 0.01 knots | ||
| 1-12 Beaufort | 1 | ||
| Air volume calculation | 0 - 9999 CMM | 0.01 | |
| 0 - 9999 CFM | 0.01 | ||
| size | 156(L) x 73(W) x 35(H)mm | ||
| weight | About250g | ||
| Power supply | 1.5V*6 | ||
| Wind speed | Air volume | 99 records | 30000 records | The temperature | Humidity | The Atmospheric pressure | USB | |
| TM-4001 | √ | √ | √ | nothing | √ | nothing | nothing | nothing |
| TM-4002 | √ | √ | √ | nothing | √ | √ | nothing | nothing |
| TM-4003 | √ | √ | nothing | √ | √ | √ | √ | √ |