The Berthold Technologies 9128 moving filter monitor collects and measures air from rooms, ducts or the environment for the presence of Alpha and Beta particulates. The COMPACT design integrates a sampling head with detector, the pump unit and the control electronics in a standard 19” cassette. An S-class glass fiber filter-tape collects the sample air particulates. This filter-tape advances at a programmable continuous speed eliminating the need for frequent filter replacement due to dust loading. A rugged Silicon detector allows to measure both Alpha and Beta particulates. The Silicon detector is installed above the dust collection area at close distance to the filter, and delivers optimal Alpha & Beta counting performance. Radon progeny is eliminated from the gross Alpha Beta activity using Pseudo-coincidence gating or Beta/Alpha ratio compensation methods . Downstream of the filter a silent pump unit ensures a stable flow rate of 3m3/h. In the standard version a 3-Channel electronics LB 5310 processes the detector signals. This electronics allows the user to measure the presence of radioactive aerosols as well as the ambient dose rate and to trigger alarms above certain levels. The healthy status of the overall system is continuously monitored.

Application: GENERAL

Alpha-Beta particulates monitoring in low to medium intensity gamma fields. Workplace, stack- and environmental monitoring requiring long maintenance intervals even when the air contains high or very high dust concentrations, preventing the use of fixed filters and high flow rates. Where space is at a premium or when movable intervention equipment is needed. SPECIFIC Decommissioning with abrasive material removal (grinding, torch cutting, chiseling) High activity Nuclear waste disposal sites. Environmental monitoring with the 9128-ENV version.