|
Ion Name
|
ION Species
|
Sensing
Element
|
Range @
25°C
|
pH Range
|
Temp Range (°C)
|
Known Interferences
|
| Ammonia/Ammonium |
NH3/NH4+
|
Gas Sensing
|
5 X 10-7 to 1 M
(0.01 to 17,000 ppm) |
Above 11
|
0 to 50
|
Volatile Amines |
| Ammonium |
NH4+
|
PVC Membrane
|
5 X 10-7
to 1M (0.01 to 18,000 ppm) |
4 to 10
|
0 to 50
|
K+, Na+ |
| Bromide |
Br-
|
Solid State
|
5 X 10-6
to 1M (0.01 to 79,900 ppm) |
1 to 12
|
0 to 80
|
I-, Cl-,
S2-, CN- and NH3 |
| Cadmium |
Cd++
|
Solid State
|
1 x 10-7 to 1 x
10-1M (0.01 to 11,200 ppm) |
2 to 8
|
0 to 80
|
Hg2+, Ag+ &
Cu2+ must be absent, high levels of Pb2+ & Fe2+ |
| Calcium |
Ca++
|
PVC Membrane
|
5 X 10-7 to 1 M
(0.02 to 40,000 ppm) |
2.5 to 11
|
0 to 50
|
pB2+, Hg2+, Si2+,
Fe2+, Cu2+, Ni2+, NH3, Na+, Li+, Tris+, K+, Ba+, Zn2+, Mg2+ |
| Carbon Dioxide (carbonate) |
CO2
|
Gas Sensing
|
10-4 to 10-2M (4.4
to 400ppm) |
4.8 to 5.2
|
0 to 50
|
Volitile Weak Acids |
| Chloride |
Cl-
|
Solid State
|
5 X 10-5 to 1M (1.8
to 35,500 ppm) |
2 to 12
|
0 to 80
|
CN-, Br-, I-, OH-
& S2- must be absent |
| Cupric |
Cu++
|
Solid State
|
8 X 10-6 to 10-1M
(6.4 X10-4 to 6,000 ppm) |
2 to 12
|
0 to 80
|
Hg2+ & Ag+ must
be absent; high levels Fe2+, Br- and Cl- |
| Cyanide |
CN-
|
Solid State
|
8 X 10-6 to 1 X
10-2M (0.2 to 260ppm) |
10 to 14
|
0 to 80
|
I-, Br-, Cl-, S2-
must be absent |
| Fluoride |
F-
|
Solid State
|
1 X 10-6 to saturation
(0.02ppm to saturation) |
5 to 7 @ 10-6M
11 @ 10-1M
|
0 to 80
|
OH- |
| Iodide |
I-
|
Solid State
|
5 X 10-8 to 1M (5
X 10-3 to 127,000ppm) |
0 to 14
|
0 to 80
|
CN-, S2O32-, Cl-,
S2-, NH3 |
| Lead |
Pb++
|
Solid State
|
1 X 10-6 to 1 X
10-1M (0.2 to 20,700ppm) |
4 to 7
|
0 to 80
|
Hg2+, Ag+, Cu2+
must be absent; high levels of Fe2+ & Cd2+ |
| Nitrate |
NO3-
|
PVC Membrane
|
7 X 10-6 to 1M (0.1
to 14,000ppm) |
2.5 to 11
|
0 to 50
|
CIO4-, I-, ClO3-,
F- |
| Potassium |
K+
|
PVC Membrane
|
1 X 10-6 to 1M (0.04
to 39,000ppm) |
2 to 12
|
0 to 50
|
Cs+, NH4+, TI+,
H+, Ag+, tris+, Li+, Na+ |
| Silver/Sulfide |
Ag+
S2-
|
Solid State
|
Ag+: 10-7 to 1M (0.01 to 107,900ppm)
S-: 10-7 to 1M (0.003 to 32,100ppm)
|
2 to
12
10 +
|
0 to 80
|
Hg2+ |
| Thiocyanate |
SCN-
|
Solid State
|
5 X 10-6 to 1M (0.29
to 58,100ppm) |
2 to 10
|
0 to 80
|
I-, Br-, CN-, NH3,
S2O32-, Cl-, OH-, S2- |
|
