Do you measure the steady state of a room? Wrong! Measure the parameters of the zone when it’s changing – this provides the right critical parameters of ACH and L/s-person, as recommended in ASTM D6245-24.

Our patent-pending FastLog feature automatically records high-rate data, based on user-adjustable triggers, ensuring you capture the highest quality data during transient events.

FastLog lets you log at long intervals (e.g. 30 or 60 minutes) but when critical parameters suddenly change, the Logger automatically switches to rapid logging, capturing all the important parameters as the room or zone restabilises.