Biomedical Engineering Reference
In-Depth Information
Table 8.9 Specifications: B4 (4-Electrode sensors) [
46
]
Miniature sensors
H
2
S-B4
CO-B4
NO-B4
NO
2
-B4
SO
2
-B4
O
3
-B4
Operating range (ppm/ % LEL)
0-25
0-50
0-20
0-20
0-20
\2
Sensitivity (nA/ppm)
1,800-2,600
500-750
700-1,300
-350--600
350-550
-850-1,700
Resolution (ppb equivalent)
\4
\10
<5
\5
\3
\3
Response time (t90) (s)
\50
\25
<30
\35
\50
\30
Zero current (ppb equiv. @ 20 C)
\-15-+5
\-400-0
<2100-+500
\-60-+100
\0-+200
\-75-0
Overgas Limit (ppm)
100
100
50
50
50
nd
Operating life (months)
a
[24
[24
>24
[24
[24
[24
Temperature range (C)
-30-50
-30-50
230-50
-30-50
-30-50
-20-50
Pressure range (kPa)
80-120
80-120
80-120
80-120
80-120
80-120
Humidity range (%rh)
15-90
15-90
15-90
15-90
15-90
15-90
Load resistor (ohm) recommended
33-100
33-100
33-100
33-100
33-100
33-100
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