Experimental Study on a Forced-Circulation Loop Thermosiphon Solar Water Heating System

Table 2

Manufacturers, models, and precisions of monitoring devices.

Device	Specification	Precision
Power sensor	WBI021S91; (Weibo, China)	0.5%
Pyranometer	TQB-2; (Sunlight, China)	≤2%
Thermocouple	0.2 mm T-type; (USTC, China)
Data collection	34970A; (Agilent, USA)	/
Pressure sensor	P3308; (Germany)	≤0.5% of FS