R3l@X
Well-Known Member
When I did the salt test on my cheap hygrometer the readings were off as much as 8% but again the test is easy to do then you mark the difference on emIt might help a touch then.
You want to pick up a few of these IC3......
http://www.ebay.co.uk/itm/Mini-Digital-LCD-Thermometer-Humidity-Temperature-Hygrometer-Probe-Sensor-white-/251099645030?pt=UK_Kitchen_Accessories&hash=item3a76b48466
You could have one in each tent and one hanging outside of the roof.