072-0500
Alphasense User Manual
OPC-R1 Optical Particle Counter
Issue 1
Alphasense Ltd
Page 3 of 33
February 2019
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-R1 Specification
All dimensions in millimetres (± 0.15 mm)
MEASUREMENT
Particle range
(
m
m)
Spherical equivalent size (based on
RI of 1.5+i0)
0.35 to 12.4
Size categorisation (standard)
Number of software bins
16
Sampling interval (seconds)
Histogram period (recommended)
1 to 30
Sample flow rate
mL/ min
240
Max particle count rate
Particles/ second
10,000
Detection limits (PM
10
)
Minimum
Maximum (electronic limit)
0.01
m
g/m
3
1 500 mg/m
3
Coincidence probability
%
at 10
6
particles/ L
0.7
POWER
Measurement mode
mA
95-100
Non-measurement mode
mA Laser and fan off
5
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)
Laser classification
as enclosed housing
Class 1
Temperature range
°C
-10 to 50
Humidity range
% rh (continuous)
0 to 95 (non-condensing)
Weight
g
< 30
Table 1.
Power and environmental performance limits