1.1 Sensor membrane specifications
Table 1 Sensor specifications
Sensor type
31270 H
2
Specification
Membrane 29561A
Membrane 2952A
Membrane 2935A
Thickness [μm]
25
25
25
Material
PFA
ETFE
ECTFE (Halar
®
)
Recommended applications
Waste gas offgas, reactor
coolant
Reactor coolant
High H
2
level
Radiation limits
10
5
rad
10
8
rad
10
8
rad
Measurement range at 25°C
0–1.5 ppm
0–16 cc/kg
0–1 bar
0–5 ppm
0–60 cc/kg
0–3 bar
0–15 ppm
0–180 cc/kg
0–9 bar
Accuracy (sample
temperature 20-50°C within
± 5°C of calibration
temperature)
The greater of ±1 % of
reading or ±4 ppb, or
±0.06 cc/kg, or ±3 mbar
The greater of ±1 % of
reading or ±16 ppb, or
±0.2 cc/kg, or ±12 mbar
The greater of ±1 % of
reading or ±45 ppb, or
±0.5 cc/kg, or ±30 mbar
Accuracy (sample
temperature 0-50°C
independent of calibration
temperature)
The greater of ±2 % of
reading or ±30 ppb or
±0.35 cc/kg or ±12 mbar
The greater of ±2 % of
reading or ±120 ppb or
±1.2 cc/kg, or ±40 mbar
The greater of ±2% of
reading or ±300 ppb or
±3.0 cc/kg, or ±100 mbar
Measurement cycle
(seconds)
20
Sample flow rate (through
flow chamber)
200 mL/min
100 mL/min
50 mL/min
Table 2 Sensor specifications
Sensor type
31272 H
2
31570 N
2
Specification
Membrane 29561A
Membrane 2952A
Membrane 2935A
Membrane
29561A
Thickness [μm]
25
25
25
25
Material
PFA
ETFE
ECTFE (Halar
®
)
PFA
Recommended
applications
Waste gas and
offgas
Waste gas and
offgas, reactor
coolant
Reactor coolant and
high H
2
level
Beverage
Radiation limits
10
5
rad
10
8
rad
10
8
rad
10
5
rad
Measurement range at
25°C
0–0.075 ppm
0–8 cc/kg
0–0.5 bar
0–2.5 ppm
0–30 cc/kg
0–1.5 bar
0–7.5 ppm
0–90 cc/kg
0–4.5 bar
0–250 ppm
0–200 mL/L
0–15 bar
Accuracy (sample
temperature 20-50°C
within ± 5°C of
calibration
temperature)
The greater of ±1 %
of reading or ±2 ppb,
or ±0.03 cc/kg, or
±2 mbar
The greater of ±1 %
of reading or
±8 ppb, or
±0.1 cc/kg, or
±6 mbar
The greater of ±1 %
of reading or
±25 ppb, or
±0.25 cc/kg, or
±15 mbar
The greater of
±2 % of reading or
±0.5 ppb, or
±0.5 mL/L, or
±30 mbar
4
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