9501 Remote Particle Counter

Features & Benefits

Measures 0.5 μm to 25 μm
0.1 CFM (2.83 LPM) flow rate
Long-life laser diode technology
Measures up to 6 channels of simultaneous data (30 channels optional)
Particle concentrations up to 15,000,000 Particles/ft3 @ 10% coincidence loss
Internal critical orifice
Internal HEPA filter
User-selectable channel sizes
(Optional) temperature and relative humidity probe available
Stores up to 65,000 sample records for on-board data redundancy
Connect using Modbus RTU/ASCII over isolated RS-485
Versatile mounting options
Complies with ISO 21501-4 and JIS B9921 standards
Lightweight stainless steel enclosure
Seamless integration into a facility monitoring system
Alarm light
LED Indicators


The Particles Plus 9501 Remote Particle Counter measures 0.5 μm to 25.0 μm with a flow rate of 0.1 CFM (2.83 LPM) and is the most advanced basic remote particle counter available. The 9501 remote particle counters report 6 particle size channel. The remote is designed to be installed on an external vacuum system with internal critical orifice controlled flow. Integration is easy into a building automation and cleanroom management system via standard MODBUS RS-485 communications.