Air-sampler detector assembly consists of a filter holder 60mm dia, a suction chamber with air inlet and outlet & detector housing fabricated with stainless steel .Alpha-Beta detector consists of ZnS(Ag) scintillator deposited on Plastic scintillator of 50mm diameter, coupled to matched PMT with Pre-amplifier. Detector efficiency achieved for Alpha is about 25% with Am241 and for Beta it is about 25% with Sr90 Yt90 and Collection efficiency obtained is better than 97% is achieved with this design. Suction chambers design facilitates the user to easily replace the filter paper periodically as per the requirement. Electronic module: This will indicate, the air sample activity deposited on the filter paper in terms of CPM CPS Bq .Other built-in electronic sub-systems include HV module, SMPS, controller card, EMIEMC filters, current loop circuit, relay & relay driver circuit, etc .Front panel has TFT display with touch screen, alarms indication on TFT display, audio buzzer, etc. Enclosure has connectors for connecting to Scintillation probe, 17 pin IO connector, test sockets, Ethernet connector, A.C. mains switch, fuse holder etc. This module will provide alarm annunciation both visual and aural when the activity exceeds preset level. This system provides current loop output; relay output on 17 pin IO connector. Ethernet port facilitates connection to NXG_RadGrid SCADA for data communication for visualization of CAM parameters.
Hyderabad, Telangana, India
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