Kestrel
Every single Kestrel Weather Meter is calibrated for every single value, either directly against NIST-traceable standards or against an intermediary standard that is calibrated daily - so you can be absolutely sure that your weather readings are accurate to the stated specifications. The entire Kestrel line is designed and built in the USA - no other handheld weather meter is.
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Kestrel DROP D3 Wireless Temperature, Humidity & Pressure Data LoggerSpecial Price £148.96 £124.13 Regular Price £176.71