Wind Sensors / Product Certification

Product Certification

The FT7 Series are probably the most tested wind sensors in the world. They have passed over 30 independent tests including sand, dust, ice, vibration, corrosion, hail and lightning protection. During design the FT7 series has passed the FT Highly Accelerated Life Cycle test in which the sensor is temperature cycled from +125°C to -90°C whilst being vibrated at 30G RMS.

In addition, all our wind sensors are 100% wind tunnel checked before despatch to ensure that they will give many years of reliable service, even in the harshest conditions. The wind tunnel is calibrated annually and sensors are regularly selected from production and their calibration cross-checked in a MEASNET wind tunnel. This ensures the accuracy of FT wind sensors.

Environmental Certification

ISO 9227 (2006)

Corrosion Resistant: Tested to category C5-M High of BS EN ISO 12944 (1998) in a neutral salt spray atmosphere for 1440 hours.
Sand and Dust Test Icon

DEF STAN 00-35 CL25

Wind Blown Sand & Dust Test: Sand particles for three hours and then dust particles for three hours, at 29m/s air velocity, concentration 1.1g/m³.

EN 60068-2-13 (1999)

Low Air Pressure Test M: Four hours at a constant low pressure typical to 4000 metres above sea level. Additional tests in a dedicated altitude wind tunnel have shown that the sensor measures accurately up to 4000 metres.

EN 60068-2-5 (2011)

Solar Heating Test: 24 hours of UV radiation with an ambient temperature of 55°C, irradiance of 1120 W/m².

Vibration and Shock

EN 60068-2-6/64 (2008)

Sinusoidal Vibration Test Fc: 5Hz to 500Hz, 1 octave/minute sweep rate, 5 sweep cycles, 3 axes. Random Vibration Test Fh: 5Hz to 500Hz, 90 minutes per axis, 0.0075g²/Hz severity over 3 axes.

EN 60068-2-27 (2009)

Mechanical Shock Test Ea and CAF2656. Peak acceleration: 50g. Duration: 11ms. Pulse shape: half-sine.

EN 60068-2-31 (2008)

Drop and Topple Test Ec: Dropped 9 times at different angles from at least one metre onto concrete.

IEC 61215-2 (2016)

Hail Impact Test. 50mm diameter ice balls, weighing 57g each, shot at the sensor at 31m/s. Hail withstand class HW 5.

Waterproof and Sealing

EN 60068-2-78 (2013) EN 60068-2-38 (2009)

Stationary Temperature & Humidity Test Cab: Relative humidity +93% at +40°C for 240 hours.
Combined Temperature & Humidity Test Z/AD: Ten 24 hour cycles, upper temperature +65°C. Cold sub cycle: -10°C.

EN 60068-2-30 (2005)

Cyclic humidity – Six 24 hour cycles, upper temperature 55C°.

ISO 20653:2013 IPX6K
EN 60529 (1992+A2:2103)

Sealed to IPX6K, IP66 and IP67. Protected against high velocity water jets with increased pressure, access to hazardous parts and against solid foreign objects. Submerged in one metre depth of water for 30 minutes, and exposed to a dust chamber for 8 hours.

DEF STAN 00-35 CL26/27

Mist, Fog and Low Cloud Test CL26: Fog intensity of 1.66ml/80cm² for one hour.
Driving Rain Test CL27: Rain intensity of 200mm for one hour.

Temperature Extremes

EN 60068-2-1 (2007)

Cold Temperature Test Ad: 16 hours of cold air at -40°C.

EN 60068-2-2 (2007)

Dry Heat Test Bd: 16 hours dry heat at +85°C.

EN 60068-2-14 (2009)

Thermal Cycling Test Nb: 16 temperature cycles from -40°C to +85°C.


Anti-Icing Test: With the heater switched on, the sensor was exposed to freezing rain in an airflow of 15m/s at -15°C. Even when 37mm of ice had built up on the test bar the sensor itself remained ice-free.
De-Icing Test: The sensor was ice-free in under 5 minutes.

EMC Tests

  • EN 61000-6-3 (2007)
    Emission standard for residential, commercial and light-industrial environments

  • EN 61000-6-2 (2005)
    Generic Standards – Immunity for Industrial Environments

  • EN 61000-4-2 (2009)
    Electrostatic discharge immunity test

  • EN 61000-4-3 (2006)
    Radiated, radio-frequency, electromagnetic field immunity test

  • EN 61000-4-4 (2012)
    Electrical fast transient/burst immunity test

  • EN 61000-4-5 (2006)
    Surge immunity test

  • EN 61000-4-6 (2009)
    Immunity to conducted disturbances, induced by RF fields

  • EN 61000-4-8 (2010)
    Power frequency magnetic field immunity test

  • EN 61000-4-9 (2009)
    Pulse magnetic field immunity test

  • EN 61000-4-10 (2001)
    Damped oscillatory magnetic field immunity test

  • EN 61000-4-29 (2001)
    Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests

ETL Certification

All FT7 Series wind sensors are Recognized Components by Intertek authorized to:

UL 61010-1 Electrical equipment for measurement, control & laboratory use

CSA 22.2.61010-1-04 Electrical equipment for measurement, control & laboratory use