SLT-365B radioactive nasal swab detector

Product Introduction:

The SLT-365B radioactive nasal swab detector is of great significance for quickly and accurately screening and classifying a large number of people who may be contaminated by radioactive isotopes at the scene of a nuclear radiation emergency. It is essential for safeguarding people's lives and health, effectively utilizing medical resources, maintaining social stability and national security.

The radioactive aerosols inhaled into the body first deposit in the human respiratory system and gradually transfer to other tissues or organs. The radioactive isotopes retained in the body will have long-term exposure to the human body, which may ultimately lead to tissue damage or cancer. for exampleFor alpha nuclides (241Am, 239Pu, 235U, 238U, etc.), although in vivo contamination detection can be carried out using in vitro direct measurement methods suitable for low-energy X-rays, this method requires high measurement environment background and detection efficiency calibration, and can only be carried out in a few laboratories at present. However, biological sample analysis usually has chemical specificity and the process takes a long time (several days to several weeks), making it difficult to provide results quickly. Therefore, in the event of a nuclear radiation outbreak, how to quickly and accurately detect possible alpha nuclide inhalation contamination has always been a requirement for medical rescue. In the early years, it was an internal irradiation detection instrument based on gold silicon surface barrier detectors, which used semiconductor detectors (long lifespan, not easily contaminated).

Sampling method:

useA new, unused nasal swab is used to scrape radioactive contaminants from the nostrils, mouth, or wound of the tested person, obtain a sample nasal swab, record the date and time of sample acquisition, and assign a real name number to the tested person.

Measurement principle:

This instrument generates internal radiation to the human bodyThe rapid detection method for alpha particles uses semiconductor detectors. Due to the high resolution of semiconductor detectors, low concentration alpha particles can be quickly measured using energy discrimination methods. Firstly, in the case of natural radioactivity, sampling and measurement are carried out, and the background correction coefficient of natural radioactivity is obtained before measurement, in order to quickly obtain the activity Bq/m3 of alpha particles on the inner surface of the human body or calculate the counting rate cpm.

Technical indicators:

Detector:Φ 20mm semiconductor detector

Detection of radiation type:α、β/γ

Detection lower limit:α<0.5Bq/cm2，β<1.5Bq/cm2

Background and efficiency:Alpha background<0.02pcs; β/γ background<3cps

Alpha detection efficiency ≥ 50%; β detection efficiency ≥ 40%

α. β/γ Crossover: β/γ string α channel ≤ 0.1%, α string β/γ channel ≤ 3%

Display unit:cps 、Bq/cm2

Measurement range: (Dead time<)10%）0 ~ 5000cps； 0.1Bq/m3 ~ 1×100000Bq/m3

Relative inherent error:≤±15%

Can input operator information, detection time, measurement data, coordinates and other information, and integrate them into the on-site emergency management system for use

Measurement sensitivity: measurement cycle5~60 minutes (adjustable), usually set to 5 minutes; The lower limit of activity for 239Pu α particles can reach 0.1Bq/m3

Basic error of the instrument under normal conditions≤±10%

Under normal conditions, the detection efficiency of the instrument changes after eight hours of operation≤±10%

Wipe sample test: with measuring drawer1, equipped with 300 nasal swabs; Nasopharyngeal swab sample measurement can be performed at any time

Data recording:≥ 1000 measurement values

electricity Source: DC (rechargeable lithium battery) orAC 220V ~ 12V

operation temperature: 0 ~ 40ºC (±2ºC)

Relative humidity:≤90%（30ºC）

chi Inch:360×260×245mm

weight Quantity:4600g