SELECTION GUIDE
How to select a particle counter: size channels, sample flow and data interfaces
Start particle counter selection with the measurement task: which particle sizes to record, where and how often to sample, and how the data will be used. Then compare instrument configurations and installation requirements.
How do online monitoring and offline checks differ?
Consider online monitoring when fixed locations require ongoing particle records, and offline checks when separate measurements are scheduled across multiple locations. Review monitoring frequency, transport routes, installation space and record handover. Airborne particle counts cannot be used as microbial culture results.
What should be checked when selecting size channels?
List the particle sizes required by the measurement plan, then check the available instrument channels individually. Minimum detectable size, channel settings and channel count describe different aspects; channel count alone does not establish suitability. Confirm the count-reporting format and units so the display, exports and project records align.
How does sample flow affect the testing schedule?
Assess sample flow alongside the required sample volume and time at each location. At a steady flow, sampling time can be estimated by dividing volume by flow; allow separately for setup, travel and recording. When sampling tubing is used, check its length, routing and vacuum conditions against the instrument requirements.
Which data interface requirements need review?
Define whether users will export records or send data to an environmental monitoring system. For connected configurations, review interfaces, protocols, data fields, timestamps and location identifiers, and specify alarm, connection-loss and data-recovery requirements. For an existing system, have both equipment and system providers confirm compatibility. An interface name alone is insufficient.
What should be prepared for selection and a quotation?
Provide a layout, sampling locations and quantities, required size channels, sample volume or flow requirements, testing frequency and intended data use. For online projects, include power, network, tubing and vacuum conditions; for upgrades, add existing device models and interface documentation. Include calibration, acceptance and reporting needs so proposals and quotations address the same requirements.