072-0300
Alphasense User Manual
OPC-N2 Optical Particle Counter
Issue 5
Alphasense Ltd Page 3 of 34
December 2015
Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. Essex.CM77 7AA. UK
Tel: +44 (0) 1376 556700 - Fax: +44 (0) 1376 335899
Email: [email protected] - Web: www.alphasense.com
2 OPC-N2
Specification
All dimensions in millimetres (± 0.15 mm)
MEASUREMENT
Particle range (
μ
m)
Spherical equivalent size (based on RI of
1.5+i0)
0.38 to 17
Size categorisation (standard) Number of software bins
16
Sampling interval (seconds)
Histogram period (recommended)
1 to 10
Total Flow rate (typical)
Sample flow rate (typical)
L/ min
mL/ min
1.2
220
Max particle count rate
Particles/ second
10,000
Detection limits (PM
10
)
Minimum
Maximum
0.01
μ
g/m
3
1 500 mg/m
3
Coincidence probability
% at 10
6
particles/ L
0.84
POWER
Measurement mode
mA (typical)
175
Non-measurement mode
mA (typical) Laser at minimum power; fan
off
95
Transient power on start-up
mW for 1 ms
<5000
Voltage range
V DC
4.8 to 5.2
KEY SPECIFICATIONS
Digital Interface
SPI (Mode 1), USB 2.0
Data storage
micro SD
16 GB
USB VID
Ox04D8
USB PID
OxF3D5
Laser classification
as enclosed housing
Class 1
Temperature range
°C
-20 to 50
Humidity range
% rh (continuous)
0 to 95 (non-condensing)
Weight
g
< 105
Table 1.
Power and environmental performance limits
Ricardo AEA will certify performance and calibration, following ISO 17025 standard, this is ongoing.
