NESA VV1 First Class wind speed sensor



Product Introduction
Product Features
Technical Details
Product Introduction

Sensor “First Class” to measure the wind speed at low power consumption also available in a heated version (model VV1R), compact and sturdy, made of aluminum alloy with anodized to protect against salt air and oxidizing agents.
Extremely linear and precise, with high dynamic response even in strong gusts, easy to interface with any data logger. The sensor uses specific arrangements including special self-lubricating bearings, which allow the MeasNet certification and make it ideal for Eolic monitoring applications (Wind power), guaranteeing maximum performance. The sensor is equipped with electrical protections and is available with various signal outputs.

  • 0,1m/s High precision
  • high linearity R>0,99998
  • Calibrations: MeasNet and SIT wind tunnel.
  • Classification in accordance to IEC 61400-12-1, EN 15518-3:2011
  • According to WMO standards
  • Low power consumption Heated version (5W@12Vdc)
  • Rotor with high speed and long life ball bearing (MIL-L-6085 C)
  • IP68 fast connection

VV1R First Class Heated wind speed sensor is also available

Product Features

  • Measurement of wind speed with very high precision (<0.1 m/s)
  • Calibrations: wind tunnels MeasNet and ACCREDIA
  • Classification according to IEC 61400-12-1 and “First Class” , Class A 1.96, Class B 3.05 Class S 2:42
  • Instrument according to standard WMO
  • Rotor with high performance ball bearing (MIL-L-6085 C)
  • Low power consumption (<0.1W; <5W@12VDC with heater)
  • Typical measuring range: 0.28 to 50m/s (0 …150 Hz) up to 100m/s
  • Linearity: R> 0.99998 with a standard error of <0.02 m/s
  • Output signal: pulses (150Hz), 4-20mA, 0÷2Vdc or digital RS485/Modbus
  • Operating conditions: -10 ÷ +70° C, heated version -35 ÷ +70°C, 0 to 100m/s (burst)
  • Power supply: 10 ÷ 30Vdc (<5W @ 12VDC with heater)

Technical Details

Typical measurement range

0.28 ÷ 50 m/s (0…150Hz) up to 100m/s (freq. output)


0.05m/s wind run

Average Accuracy

<0.1 m/s (0.4 ÷ 30m/s); <± 1% v.m. (>(>30 m/s)

Typical linearity

r>0.99998 standard error 0.02m/s; f(m/s)= (Hz x 0.33) + 0.3 Class A : 1.96 Class B : 3.05 Class S : 2.42


stopping 0.1 m/s; starting < 0.3 m/s

Type of transduce

3 cups (Robinson reel) with magnetic transducer

Signal output

0÷2Vdc, 4÷20mA; 0÷150Hz (50 Ohm on 20mA max)

Digital RS485/ModBus

Working conditions

-10 ÷ +70°C; blasts 0 ÷ 100 m/s

 -35 ÷ +70°C heated version


polarity reverse and transient

Made of

Anodized aluminium and stainless steel

Heater power supply

Max 50W@12Vdc (mod. PL400R)

Power supply and consumption

10 ÷ 28Vdc < 0,1W; 5W@12Vdc with heating




Standard cable

Shielded multi-core cable for indoor/outdoor use, suitable for hot and cold climates.

With IP68 waterproof connector for connecting the sensor, and PS2 plug connector for direct connection to the data logger or with terminal sleeves for insertion into the terminal blocks.

Our cables are standard for most our sensors.

Available in different lengths starting from 1m.

Special Cable

NPI shielded cable. With IP68 waterproof connector for connecting to the sensor, and terminal sleeves for insertion into the terminal blocks.

Available in any length.

Bracket / Arm Support

Fixing system for Nesa’s sensors, composed by an arm of different lengths (50cm, 90cm, 150cm) and thermoplastic resin clam for external, able to withstand to extreme temperature and to solar radiation.

Two stainless steel screws for the tightening of the clamp on the sensor complete the equipment.

MCS Signal Conditioning Module

Single channel module for conditioning digital and analog electrical signals. Fully programmable for binding input/output with the USB interface available as an option.

·       Programmable input signals: Pt100, thermopiles, Voltages up to 2Vdc, Current 0÷20mA or 4÷20mA, frequency up to 1000Hz, Counter for pulses (1ms min)

·       Programmable Output signals: voltage 0÷2Vdc; Current 0÷20mA or 4÷20mA Serial RS485 (command line); Modbus RS485

·       Resolution: 18 bits with over 262,000 points

·       Operating conditions: -40 ÷ +80°C

·       DIN rail mounting

·       Power supply: 10÷30Vdc (typ. 4mA@12 Vdc)