Testo 410i
One centimetre here and there is really not inconsequential, use an electric measuring tool to be safe. You get great flexibility since it runs on a battery and lacks a cord that c
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From Amazon
testo 410i - Bluetooth Vane Anemometer Smart Probe
£99.60
Conrad Electronic
testo 410i Smart Probes Anemometer 0.4 up to 30 m/s
£115.40
Rapid Online
Testo 0560 1410 410i Smartprobe Bluetooth Vane Anemometer
£123.59
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