Nuclear Instruments
Section One .Laboratory Radiation Measuring Instruments Section Two.Portable Style Radiation Detection Instrument Section Three.Radioactive contamination monitor Section Four.Radioactive waste measurements Section Five.Underwater Radioactivity Measuring Device Section Six.Area Radiation Measurement Section Seven.Tritium Air Monitors
HOME > PRODUCT > Nuclear Instruments > Section Two.Portable Style Radiation Detection Instrument > TK-211 Portable Surface Contamination Detector
Portable Surface Contamination Detector
Product details


Fig. 1 α, β surface contamination detector and typical interface

. Product Introduction

TK-211 is a large sensitive-area portable α, β surface contamination detector developed by Beijing Tai Kun Industrial Equipment Co.,Ltd, which uses 0.5mm thick plated ZnS (Ag) plastic scintillator as a detection unit, to effectively eliminate the interference of γ ray to β ray, without needing for air flow or inflation, reducing operating costs and maintenance costs. Pulse amplitude screening circuit is used, to automatically distinguish α, β particles and achieve α, β simultaneous measurement, minimizing the mutual impact. The imported G-M tube with the energy compensation is used to measure γ-ray, with a wide γ-ray dose rate range. Ergonomic design is used, with light weight, and a large screen display is used, easy to observe the reading.

. Main Features

l  Continuous measurement mode and fixed time measurement mode are optional;

l  The measurement time at the fixed measurement mode can be customized;

l  The nuclide library is programmed freely;

l  To measure α, β radioactivity and unit area activity of specific nuclide;

l  With a special double-flash design used, the probability of γ-ray mixing into theβ-channel count is very low;

l  To simultaneously measure α, β and γ rays;

l  With lagre sensitive detection area;

l  A reasonable optical reflection design makes that the detection efficiency of the detector is high, and data are accurate.

. Technical Specifications

l   Detection ray type: α, β and γ rays;

l  Measurement units: cps, Bq, Bq/cm2 and μSv / h.

l  Instrument background: α: about 0.1cps, β: 10 ~ 15cps;

l  Detection efficiency (with a protective grid mesh, ): for 241Am, α-ray detection efficiency is greater than 35%; for 90Sr/90Y, the detection efficiency of β-ray is more than 50%; for 137Cs, the detection efficiency of β-ray is more than 25%;

l  Measurement range: α count rate range is 0-40000cps, 1000Bq / cm2;

γ-ray counting rate is ranged -40000 cps, 1000 Bq / cm2;

        The dose rate range of γ ray is 0.1μSv/h-10Sv/h;

l  Cross interference: <0.5%;

l  Detection area: 170cm²;

l  Alarm function: an independent alarm threshold can be set for α, β and γ rays, with the alarm threshold adjustable and with sound and vibrations alarms provided;

l  Background rejection: rejection and non-rejection background can be optional, with the background measurement time of not greater than 60s;

l  Operating temperature: -10 ~ 40;

l  Power supply: two 9V 800mAh rechargeable battery packs are provided; the machine can work for about 5h after charging; with disposable 9V battery available.

l  Dimensions: (L × W × H) 255mm × 154mm × 138mm;

l  Weight: <1.5kg; carried for a long time.

. Applications

l  Used for the radioactive contamination measurement in the hospitals, nuclear power plants, nuclear facilities decommissioning and nuclear waste management

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