TVV

WIND SPEED Sensor

Categories: Meteorology

TVV is composed of a rotating body connected to three conical shaped elements (cups), and it measures the wind speed exploiting the wind resistance to rotational movement of the cups. The rotating system is equipped with a six poles cylindrical magnet. A Hall effect sensor detects the rotary motion that generates in the meantime an impulse at the passage of each pole. The dimensions of the cups and the lightness of their material have been thoroughly picked to achieve a very low mechanical inertia and, consequently, to ensure a high sensitivity of the measurement. The structure of TVV is very robust and the sensing element has a reliable durability and a proper resistance even at high wind speeds. Furthermore, its simple and compact design facilitates the installation and makes easier the on-site maintenance activities. The sensor is supplied with power and signal cable (12m), and it is available upon request on heated version, powered at 24V (alternating or direct current).

Main features
• Low inertia and high resolution
• High accuracy
• Protection against overvoltages
• Equipped with heating system (optional)

Product Detail Description

Measurement performance  
Wind speed [m/s]  
Transducer 6-pole magnet and stabilized Hall effect sensor
Measurement range 0.25 ÷ 50
Resolution 0.1
Accuracy < 0.15 or 1% of the measured value
Operating conditions  
Temperature -40°C ÷ +70°C
Humidity 0% ÷ 100%
Outputs  
Natural Open drain output: V measurement is given by the frequency f as following: Vv = f [Hz] / 3.3676 [Hz/ m/s] + 0.1881 [m/s]
Tension 0÷2V → 0 ÷ 50 [m/s]
Current 4÷ 20 mA <> 0÷ 50 [m/s]
RS485-Modbus Wind speed [m/s]
SDI - 12 Wind speed [m/s]
Power supply and consumption  
Voltage supply 7 ÷ 24 Vdc
Heating system voltage supply 12 ÷ 24 V [DC o AC]
Heating system power 40 W @ 24 V
Mechanical specifications  
Protective body Cups: PA6 + 30% fiberglass, the entire body is made of aluminium alloy and stainless steel screws
Weight 750 g
Dimensions OMAx = 230 mm; Height = 336 mm
Electrical connections 1P67 / 7 pole male connector
Ordering codes  
Natural output t031-TVV-N
Current output, Tension output and RS485-Modbus output t031a-TVV-IVS
SDI-12 serial output t031d-TVV-12
Heated version, Natural output t032-TVVR-N
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