O3-A40 pages

O3-A4 Ozone Sensor
Ozone
4-Electrode
4-Electrode

Technical Specification

Figure 1 O3-A4 Schematic Diagram

All dimensions in millimetres (± 0.15mm)

Top View
PERFORMANCE
Sensitivity
Response time
Zero current
Noise*
Range
Linearity
Overgas limit

Bottom View

Side View

nA/ppm at 100ppb O3
t90 (s) from zero to 100ppb
nA in zero air at 20oC
±2 standard deviations (ppb equivalent)
ppm O3 limit of performance warranty
ppb error at full scale, linear at zero and 1ppm O3
maximum ppm for stable response to gas pulse

* Tested with Alphasense AFE low noise circuit

T
F

LIFETIME
Zero drift
Sensitivity drift
Operating life

ppb equivalent change/year in lab air
% change/year in lab air, monthly test
months until 50% original signal (12 month warranted)

ENVIRONMENTAL
Sensitivity @ -20°C
Sensitivity @ 50°C
Zero @ -20°C
Zero @ 50°C

(% output @ -20°C/output @ 20°C) @ 500ppb O3
(% output @ 50°C/output @ 20°C) @ 500ppb O3
nA change from 20°C
nA change from 20°C

CROSS SENSITIVITY
H2S sensitivity
NO2 sensitivity
Cl2 sensitivity
NO sensitivity
SO2 sensitivity
CO sensitivity
H2 sensitivity
C2H4 sensitivity
NH3 sensitivity
CO2 sensitivity

% measured gas @
% measured gas @
% measured gas @
% measured gas @
% measured gas @
% measured gas @
% measured gas @
% measured gas @
% measured gas @
% measured gas @

KEY SPECIFICATIONS
Temperature range
Pressure range
Humidity range
Flow rate
Bias voltage
Storage period
Load resistor
Weight

°C
kPa
% rh non-condensing
minimum sccm during calibration
V
months @ 3 to 20°C (stored in sealed pot)
Ω (AFE circuit is recommended)
g

-200 to -400
< 15
10 to 30
5
5
200 to 500
10

D

R

A

5ppm
5ppm
5ppm
5ppm
5ppm
5ppm
100ppm
100ppm
20ppm
5%

0 to 50
-20 to -35
> 18

-10 to -30
170 to 360

H2 S
NO2
Cl2
NO
SO2 (initial transient)
CO
H2
C2 H 4
NH3
CO2

< -70
70 to 120
< 30
< -5
< -4
< 0.1
<2
< 0.1
<1
< 0.1
-20 to +50
80 to 120
15 to 85
500 (0.5L/m)
0
6
33 to 100
<6

Alphasense Ltd, Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. CM77 7AA. UK
Telephone: +44 (0) 1376 556 700 Fax: +44 (0) 1376 335 899 E-mail: sensors@alphasense.com Website: www.alphasense.com