Hach NX7500, User Manual

Page: 4 / 116

Table 1 Specifications—0.3 mm (0.01 in) optical path
Parameter Measuring range Detection limit
1
Nitrate, NO
3
-N 1 to 330 mg/L 1 mg/L
Nitrite, NO
2
-N 1.7 to 500 mg/L 1.7 mg/L
COD
eq
/BOD
eq
100 to 7300 mg/L 100 mg/L
DOC
eq
/TOC
eq
17 to 3300 mg/L 17 mg/L
Table 2 Specifications—1 mm (0.04 in) optical path
Parameter Measuring range Detection limit
2
Nitrate N-NO
3
0.3 to 100 mg/L 0.3 mg/L
Nitrite N-NO
2
0.5 to 150 mg/L 0.5 mg/L
COD
eq
/BOD
eq
30 to 2200 mg/L 30 mg/L
DOC
eq
/TOC
eq
5 to 1000 mg/L 5 mg/L
Table 3 Specifications—2 mm (0.08 in) optical path
Parameter Measuring range Detection limit
2
Nitrate N-NO
3
0.15 to 50 mg/L 0.15 mg/L
Nitrite N-NO
2
0.25 to 75 mg/L 0.25 mg/L
COD
eq
/BOD
eq
15 to 1100 mg/L 15 mg/L
DOC
eq
/TOC
eq
2.5 to 500 mg/L 2.5 mg/L
Table 4 Specifications—5 mm (0.2 in) optical path
Parameter Measuring range Detection limit
2
Nitrate N-NO
3
0.06 to 20 mg/L 0.06 mg/L
Nitrite N-NO
2
0.1 to 30 mg/L 0.1 mg/L
COD
eq
/BOD
eq
6 to 440 mg/L 6 mg/L
DOC
eq
/TOC
eq
1 to 200 mg/L 1 mg/L
Table 5 Specifications—10 mm (0.39 in) optical path
Parameter Measuring range Detection limit
2
Nitrate N-NO
3
0.03 to 10 mg/L 0.03 mg/L
Nitrite N-NO
2
0.05 to 15 mg/L 0.05 mg/L
COD
eq
/BOD
eq
3 to 220 mg/L 3 mg/L
DOC
eq
/TOC
eq
0.5 to 100 mg/L 0.5 mg/L
1
The detection limit specification refers to a standard reference solution with lab conditions. For
probes with 0.3 mm optical path length, it is recommended to adjust NO
3
and NO
2
readings by
a factor calibration. Use standard solutions or grab samples with known values to calibrate the
probe.
2
The detection limit specification refers to a standard reference solution with lab conditions.
4 English