Oceanographic Multisensor Buoy Based on Low Cost Sensors for Posidonia Meadows Monitoring in Mediterranean Sea

Table 2

Coils features.

	Coils features
	Toroid	Solenoid
Wire Diam.	0.8 mm	0.8 mm
Size and core	Inner coil diameter: 23.2 mm; Outer coil diameter: 56.5 mm; Coil high: 26.9 mm; Core: nonferrous	Inner coil diameter: 25.3 mm; Outer coil diameter: 33.6 mm; Coil high: 22.6 mm; Core: nonferrous
Number of spires	81 in one layer	324 in 9 layers