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: sensors@alphasense.com - Web: www.alphasense.com
2 OPC-R1 Specification
All dimensions in millimetres (± 0.15 mm)
Particle range
(
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 mg/m
3
1 500 mg/m
3
Coincidence probability % at 10
particles/ L 0.7
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
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
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