TENMARS TM-411 Air Velocity Meter Airspeed Anemoscope Anemometer -20~50ºC.

TM411  Anemometer
Product Description:
1- 45mm 4 plastics vane
2- High sensitivity of 0.4m/s.
3- Air flow calculates function.
4- Max/Min/Avg and data hold.
5- Auto power off with disable function.
6- Memory capacity: 99 records.
7- Memory recall function.
8- Backlight function.
9- Absolute Pressure Sensor
10- Humidity Sensor
Application: 
TM-41X series measures air speed, temperature and humidity. It is ideal for spot measurements
at air outlets on account of its 30mm vane. In addition to air speed and temperature, also measures air moisture and absolute pressure. In this way, air conditions can be reliably checked.
?Four models:
MODEL# Velocity 99 Record Flow Temperature Humidity Pressure
TM-411 V V V -- -- --
TM-412 V V V V -- --
TM-413 V V V V V  
TM-414 V V V V V V
Specification:
Velocity (Air Speed):
Unit Range Resolution Accuracy
m/s 0.4~45 0.1 3%+0.2
Km/hr(kph) 1.5~160 0.1 3%+0.8
mph 0.9~100 0.1 3%+0.4
Knots(kts) 0.8~88 0.1 3%+0.4
ft/min(fpm) 79~8800 1 3%+40
Beaufort 1~12 1 -
Air Flow Calculation:
Unit Range Resolution Accuracy
CMM 0~9999 1 --
CFM 0~9999 1 --
Temperature:
Unit Range Resolution Accuracy
C -20~60 0.1 1C
F -4~140 0.1 1.8F
Humidity:
Unit Range Resolution Accuracy
%RH 20~80 0.1 3.5%RH
%RH 80 0.1 5%RH
Absolute Pressure:
Unit Range Resolution Accuracy
hPa 350~1100 0.1 2hPa
mmHg 263~825 0.1 1.5mmHg
inHg 10.3~32 0.1 0.1 
Battery not included