Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 12)

10
Technical Specifications
2.3 EC sensors and parts used on ORBISPHERE configured systems
2.4 Sensor membrane specifications
2.4.1 Hydrogen sensors
Table 2 ORBISPHERE configured systems
Configured System Sensor Membrane
Protection
Cap
Protection
Cap Kit
Maintenance
Kit
3625 Package
analyzer
31 110.02 2956A
29111 (as used
on TC sensors)
28002 Tefzel
washers only
32703
3624 ProBrix 31 110.02 2952A 29104.0 29054 32702
29981 Pharmapack 31 110A.02
2956A plus one
Goretex ®
membrane ref.
32918
None Not applicable
32703 plus
32918
(10 piece box)
Table 3 Membrane specifications - Hydrogen sensors
Membrane Model 2956A 2952A 2995A 29015A
Recommended
applications Trace
measurement
Low
concentration
Average
concentration
High
concentration
Material PFA Tefzel ® Tedlar ® Saran
Thickness [µm] 25 25 12.5 23
Calibration gas 1% pure H
2
10% pure H
2
100% pure H
2
100% pure H
2
Dissolved measurement
range 0 ppb to
75 ppb
0 ppb to
300 ppb 0 ppb to
3200 ppb
0 ppb to
32 ppm
Gaseous measurement
range 0 Pa to
5 kPa
0 Pa to
20 kPa 0 Pa to
200 kPa
0 kPa to
2000 kPa
Accuracy
The greater of ±1%
of reading
or ± 0.03 ppb,
or ± 1 Pa
The greater of ±1%
of reading
or ± 0.09 ppb,
or ± 6 Pa
The greater of ±1%
of reading
or ± 1 ppb,
or ± 50 Pa
The greater of ±1%
of reading
or ± 10 ppb,
or ± 1 kPa
Integrated radiation dose
limit
2 x 10 4 10 8 10 8 N/A
Expected current in air @
1 bar 25°C [µA]
N/A
Expected current in pure
gas [µA]
150 50 5 0.5
Temp. compensation
range
0 to 50°C 0 to 50°C 10 to 45°C 10 to 45 °C
Temp. measuring range –5 to 100° C
Response time 1 2 sec. 5 sec. 6 sec. 50 sec.
Recommended min. liquid
flow rate
2 [mL/min]
50 to 220 40 to 200 20 to 70 20 to 40
Recommended min. linear
flow rate
2 [cm/sec]
200 150 50 30
Recommended gaseous
flow rate [L/min]
0.005 to 3