Hach NT3100sc - Page 8

Table 1 Recommended pathlength—NT3100sc nitrate probe
Application
Pathlength
1 mm 2 mm 5 mm
Wastewater
Influent ✔ ✔
Nitrification/denitrification ✔ ✔
Nitrification/denitrification, more than 5,000 mg TSS/L sludge ✔
Effluent ✔ ✔
Drinking Water
Raw drinking water ✔ ✔
Finished water/distribution ✔
Table 2 Recommended pathlength—NT3200sc nitrate and nitrite probe
4
Application
Pathlength (maximum mg/L NO
3
–N)
1 mm (max NO
3
–N) 2 mm (max NO
3
–N) 5 mm (max NO
3
–N)
Wastewater
Nitrification/denitrification ✔
5
(30 mg/L) ✔ (5–10 mg/L)
Nitrification/denitrification, more than
5,000 mg TSS/L sludge
✔
5
(25–30 mg/L) ✔(5–10 mg/L)
Anammox/nitritation mainstream ✔ (10–30 mg/L)
Effluent ✔
5
(30–70 mg/L) ✔
6
(20 mg/L) ✔ (5 mg/L)
Drinking Water
Finished water/distribution ✔
5
(45–68 mg/L) ✔
7
(15–20 mg/L) ✔
8
(5 mg/L)
Note: After the complete installation of the NT3200sc, especially in sludge, it is possible that invalid values occur,
then the manufacturer recommends a matrix calibration. The matrix calibration makes sure to get a correct
measurement of the mixed NO
2
–N and NO
3
–N concentration. The matrix calibration will decrease the effect of the
light absorption caused by the unwanted and dissolved organics. Refer to Matrix calibration on page 16.
4
When nitrate and nitrite are in the sample, the accuracy of NO
2
–N and the maximum NOx–N
concentrations decrease.
5
Nitrite accuracy is limited.
6
Nitrite accuracy is limited when NO
3
–N is more than 10 mg/L.
7
Nitrite accuracy is limited when NO
3
–N is more than 18 mg/L.
8
Only in low (approximately 0 mAbs/mm) UV absorbance matrix.
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