FLOOR CONTAMINATION MONITORKEY FEATURES • Gasless scintillation detectors • Various types of detectors optimized to measure different types of radiation • Two versions with one or two detectors • User friendly, ease of use • High detection efficiency, excellent uniformity • Long operation due to new rechargeable battery • Two pre-settable alarm levels The FloorScan series floor contamination monitors are intended for the measurement of surface contamination by alpha, beta and gamma emitting radionuclides on floors. The monitor can be used in nuclear power plants, radiochemical plants, research institutes with reactors, PET centres, etc. The device is available in two sizes: with one detector (detection area 525 cm2, FloorScan-525 series) or two detectors (detection area 1050 cm2, FloorScan-1050 series). For different workplaces, an appropriate one or two channel model can be utilised. See the table with the types of monitors. The detection part is equipped with scintillation detector(s) with integrated photomultipliers and signal processing electronics, and a mechanism providing easy, fast, and precise height adjustment between the detector and the floor. It is propelled by the operator on four castor wheels.The detector's protective grille provides good protection against foil damage while still allowing good penetration of alpha and low energy beta particles. The display unit has a backlit graphic display, a membrane keyboard and a lithium-ion battery to power the meter. The display unit also includes an integrated GM tube for measuring the gamma dose equivalent rate. The meter allows the measurement of the surface contamination in two modes: • Ratemeter - continuous measurement of the average pulse frequency to aid searching for a contaminated surface. • Contamat - integration measurement for deciding on contamination or cleanliness of a specific area in comparison with the set threshold. The measurements are shown on a display unit as a digital readout and in bar graph form. For each channel the background radiation level can be measured manually and stored in memory. This background is then automatically deducted from the measurement results indicated on the display. The measurement of the gamma dose equivalent rate is an additional measurement independent of the measurement of surface contamination. It can warn the operator about higher ambient radiation. If detected contamination is higher than a pre-set threshold, a warning alarm will sound. One or two alarm levels can be set. Exceeding the first or second levels is indicated by different tones. The meter can also acoustically indicate pulses generated by the detector. Dual-channel monitors distinguish between pulse detection in the alpha channel and in the beta channel by a different sound. The currently measured values in the "Ratemeter" mode and the results of the integration measurements in the "Contamat" mode can be stored in the measurement archive together with a time stamp. The archive can then be exported to a file. Service software is used to export the archive and set the essential parameters by means of a PC/notebook connected by a service port.

TYPES OF MONITORS Contamination detector type plastic scintillator and/or ZnS(Ag) Active area Detector - floor distance 5 to 20 mm, step 1 mm Power supply Li-Ion battery, adapter 5/12 VDC Specification subject to change without prior written notice.