The Model 7400AD is a technologically advanced real-time fiber monitor that automatically detects and counts airborne fibers such as asbestos, mineral wool, advanced composites, ceramic and glass. Each 7400AD is factory-calibrated with traceability to NIOSH Method 7400 for asbestos fibers. The 7400AD ignores non-fibrous background particles using the proven principle of electric-field-induced fiber alignment and oscillation.
The 7400AD is the ideal means to check and verify worker safety during asbestos remediation and removal operations. With its fully charged battery pack, the 7400AD will operate unattended for eight hours and record the observed fiber data at regular intervals. If the fiber concentration exceeds a user-defined, pre-set level, an audible alarm sounds. Within the 7400AD is a filter from which one can obtain samples for later chemical or physical analysis, such as comparison with phase-contrast microscopy. The on-board, specialized software allows users to set a range of performance features to customize the operation.