Hach ORBISPHERE Series - Membrane Specifications - Oxygen Sensors (2)

Table 5 Membrane specifications - Oxygen sensors (1) (continued)
Specification 2956A-A 2958A-A 29552A-A 2952A-A
Integrated radiation dose limit
[rads]
2 x 10
4
10
8
N/A 10
8
Expected current in air @ 1 bar
25 °C [μA]
26.4 9.4 6.3 5.4
Expected current in pure O
2
[μA] 132 47 31.4 27
O
2
consumption in O
2
saturated
water at 25 °C [μg/hour]
40 14 9.4 8
Temp. compensation range – 5 to 60 °C
Temp. measuring range – 5 to 100 °C
Response time
5
7.2 sec. 9.5 sec. 90 sec. 38 sec.
Recommended min. liquid flow
rate
6
[mL/min]
180 120 50 50
Recommended min. linear flow
rate
6
[cm/sec]
200 100 30 30
Recommended gaseous flow rate
[L/min]
0.1 to 3
2.3.2 Oxygen sensors (Table 2)
Table 6 Membrane specifications - Oxygen sensors (2)
Specification 2935A-A 29521A-A 2995A-A
Recommended applications Saturated to super
saturated levels
Saturated to super
saturated levels
In line hot wort
(up to 70 °C)
Material Halar
®
7
Tefzel
®
Tefzel
®
Thickness [μm] 25 125 12.5
Calibration gas Air / Pure O
2
Air / Pure O
2
Pure O
2
Dissolved measurement range 0 ppb to 400 ppm 0 ppb to 400 ppm 0 ppb to 2000 ppm
Gaseous measurement range 0 Pa to 1000 kPa 0 Pa to 1000 kPa 0 Pa to 5000 kPa
Accuracy The greater of
±1% of reading
or ± 10 ppb,
or ± 20 Pa
The greater of
±1% of reading
or ± 10 ppb,
or ± 20 Pa
The greater of
±1% of reading
or ± 50 ppb,
or ± 100 Pa
Integrated radiation dose limit [rads] N/A 10
8
10
8
Expected current in air @ 1 bar
25 °C [μA]
0.9 0.7 0.2
Expected current in pure O
2
[μA] 4.7 3.8 0.9
O
2
consumption in O
2
saturated
water at 25 °C [μg/hour]
1.4 1.3 0.3
Temp. compensation range – 5 to 60 °C
5
Response time at 25 °C for a 90% signal change
6
Liquid flow through an ORBISPHERE 32001 flow chamber, with protection cap and no grille
7
Halar is a trademark of Solvay Corporation.
English 5