Table 2.

The uncertainty of measurement.

Device	Uncertainty	Accuracy	Range
Thermocouples	1	± 1 °C	− 55 to 180 °C
Solar radiation meter	0.45	± 10 W/m2	1–3999 W/m2
Digital anemometer	2.7	± 0.5 m/s	0.1–30 m/s
Graduated bottle	2	–	500 ml