Table 3.3 In-situ parameters’ measuring range

Aquaprobe Model AP-2000
Dissolved Oxygen	Range	0 – 500.0% / 0 – 50.00 mg/L
	Accuracy	0 - 200%: ± 1% of reading. 200% - 500%: ± 10%
pH	Range	0 – 14 pH
	Accuracy	± 0.1 pH
Temperature	Range	-5˚C – +50˚C
	Accuracy	± 0.5˚C
Turbidity	Range	0 – 3000 NTU
	Accuracy	± 5% of reading
Salinity	Range	0 – 70 PSU / 0 – 70.00 ppt (g/Kg)
	Accuracy	± 1% of reading
YSI Model 6820 C-M
Dissolved Oxygen	Range	0 to 50 mg/L
	Accuracy	0 to 20 mg/L: ± 0.2 mg/L or 2% of reading; 20 to 50 mg/L: ±6% of reading
pH	Range	0 to 14 pH
	Accuracy	±0.2 pH
Temperature	Range	5 to +50°C
	Accuracy	±0.15°C
Turbidity	Range	0 to 1,000 NTU
	Accuracy	±2% of reading or 0.3 NTU
Salinity	Range	0 to 70 ppt
	Accuracy	±1% of reading or 0.1 ppt

Notes:

- Accuracy: the qualitative concept of an agreeable closeness between the result of the measurement and the true value of the measured samples.