Hach ORBISPHERE 31 serie Basishandbuch Seite 4
Thermal conductivity sensors
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Sensor membrane specifications
In-line instrument applications (Table 1)
Specification
Thickness [μm]
Material
Recommended applications
Radiation limits
Measurement range at 25°C
Accuracy (sample temperature
20-50°C within ± 5°C of calibration
temperature)
Accuracy (sample temperature 0-50°C
independent of calibration
temperature)
Measurement cycle (seconds)
1
Sample flow rate
(through flow
chamber)
2
Linear flow rate
(past sensor socket)
In-line instrument applications (Table 2)
Specification
Thickness [μm]
Material
Recommended applications
Radiation limits
Measurement range at 25°C
1
Minimal flow through an ORBISPHERE 32001 flow chamber
2
Minimal flow past an ORBISPHERE 29501 sensor socket
4 English
For other purge gases, please contact your Hach Lange
Membrane 29561A
25
PFA
Waste gas offgas,
reactor coolant
5
10
rad
0-2 ppm, or
0-25 cc/kg, or
0-1.5 bar
The greater of ±1% of
reading or ± 2 ppb, or
± 0.03cc/kg, or ±
1.5 mbar
The greater of ±3% of
reading or ± 15 ppb or
± 0.18 cc/kg or ±
6 mbar
220 mL/min
N/A
31 450 CO
and
2
31460 CO
(purge
31560 N
2
gas N
)
2
Membrane 29561A
Membrane 29561A
25
PFA
In-line beverage
5
10
0-7 V/V, or
0-15 g/kg, or
0-10 bar
Sensor type
31 250 H
and 31260 H
2
2
representative for specification.
Membrane 2952A
25
ETFE
Reactor coolant
8
10
rad
0-10 ppm, or
0-120 cc/kg, or 0-6 bar
The greater of ±1% of
reading or ± 8 ppb, or
± 0.1cc/kg, or ±
6 mbar
The greater of ±3% of
reading or ± 60 ppb or
± 0.6 cc/kg, or ±
20 mbar
17
200 mL/min
N/A
Sensor type
31 550 N
and
2
31 280 H
(purge
2
gas CO
)
2
Membrane
25
PFA
In-line beverage
Reactor coolant
5
10
0-350 ppm, or
0-100% H
0-300 mL/L, or
0-20 bar
(purge gas N
)
2
Membrane 2935A
25
ECTFE (Halar
High H
level
2
8
10
rad
0-20 ppm, or
0-220 cc/kg, or
0-12 bar
The greater of ±1% of
reading or ± 25 ppb, or
± 0.4 cc/kg, or ±
20 mbar
The greater of ±3% of
reading or ± 150 ppb
or ± 2.5 cc/kg, or ±
50 mbar
100 mL/min
N/A
/D
and He (clean air
2
2
purge)
Membrane
2952A
29561A
25
25
ETFE
PFA
Waste gas PWR
8
5
10
10
/D
or
0-100% H
2
2
0-10 bar
0-4 bar
®
)
/D
or
2
2
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