Hach-Lange ORBISPHERE 31xxx Installation and Maintenance - Manual (Page 15)

13
Technical Specifications
2.4.4 Ozone sensors
Table 6 Membrane specifications - Ozone sensors
Membrane Model 2956A 29552A
Recommended
applications Trace
measurement
High concentration
(> 1 mg/l)
Material PFA PTFE
Thickness [µm] 25 50
Calibration gas
Span gas
or air
Dissolved measurement
range 0 ppb to
50 ppm
0 ppb to
200 ppm
Gaseous measurement
range 0 Pa to
10 kPa 0 Pa to
40 kPa
Accuracy
The greater of ±1%
of reading
(± 5% for sensors
calibrated in air)
or ± 5 ppb,
or ±1 Pa
The greater of ±1%
of reading
(± 5% for sensors
calibrated in air)
or ± 20 ppb,
or ± 4 Pa
Integrated radiation dose
limit
2 x 10 4 N/A
Expected current in air @
1 bar 25°C [µA]
26.4 6.5
Expected current in pure
gas [µA]
105 31.4
Temp. compensation
range
–5 to 45° C
Temp. measuring range –5 to 100° C
Response time 1
1 Response time at 25 °C for a 90% signal change
30 sec. 6 min.
Recommended min. liquid
flow rate
2 [mL/min]
2 Liquid flow through an ORBISPHERE 32001 flow chamber, with
protection cap and no grille
350 3
3 These flow rates take into account the decomposition of ozone in
the tubing between the line and the flow chamber (theoretical flow
rates in the absence of decomposition would be 10 times less)
100 3
Recommended min. linear
flow rate
2 [cm/sec]
30 10
Recommended gaseous
flow rate [L/min]
0.01 to 3