LH-III type x γPersonal dosimeter(also known as personal dose alarm) is an intelligent pocket sized instrument. It is made using the latest powerful microcontroller technology. Mainly used for monitoring X-rays and gamma rays. Within the measurement range, various threshold alarm values can be set arbitrarily, and sound and light alarms can be triggered to remind staff to pay attention to safety in a timely manner. The instrument has a large memory and can store data for about a week. The main technology of the instrument complies with national and international standards, and it is currently a wearable pocket sized instrument with strong functionality, small size, and low power consumption among similar instruments in China. It is widely used in medical, nuclear military, nuclear submarines, nuclear power plants, industrial non-destructive testing, isotope applications, hospital cobalt treatment, occupational disease prevention, and radiation dose measurement for residents around nuclear power plants.

Key Features:

Two functions: X/gamma ray dose rate around the venue (μ Sv/h), individual cumulative dose (μ Sv)

The alarm threshold is continuously adjustable, generally set at 2.5 μ Sv per day, not exceeding 50 mSv per year, and calculated based on 2000 hours per year.

The purpose is to meet the needs of high radiation workers and reduce working hours.

Large data storage capacity, with a data storage capacity of 1500 hours.

The threshold is continuously adjustable and has threshold alarm functions such as cumulative dose, dose rate, blockage, timeout, etc

Automatically record various data, power off or battery replacement data without loss

Can display parameters such as cumulative dose, dose rate, working time, maximum dose rate occurrence time and size, cumulative dose threshold, dose rate threshold, etc

High sensitivity, responsive to environmental background, small size, easy operation, strong anti electromagnetic interference ability

Technical Indicators:

(1) Detector: GM counter tube (compensated)

(2) Display: 4-digit LCD can display cumulative dose, dose rate, threshold, maximum dose rate and occurrence time, clock, etc

(3) Measurement range: Cumulative dose equivalent: Hp (10) 0.01 μ Sv-9999 mSv

Dose equivalent rate: Hp (10) 0.1 μ Sv/h-300 mSv/h

(4) Inherent error:<10% (around 2 mSv/h)

(5) Dose equivalent rate response: ≤± 20% (within measurement range)

(6) Energy response: ≤± 30% 50 keV -1.3 MeV

(7) Measurement time: 3 seconds

(8) Alarm function: When the cumulative dose or dose rate exceeds the set threshold, there will be an audible and visual alarm, and a symbol will display the blocking alarm. When the counting tube is blocked, the continuous alarm will not stop, and a symbol will display that the alarm sound intensity is about 80dB at 30cm

(9) Power consumption: One AAA type 1.5V alkaline battery (No. 5 battery) can be used continuously for 900 hours under ambient conditions

(10) Temperature characteristics: ≤± 10% -10 ℃ -+50 ℃

(11) Humidity characteristics: ≤± 10% 0-95% RH (+35 ℃)

(12) Dimensions: 73 × 50 × 19 (mm)

(13) Weight:<90 grams

Reference standards: Complies with the requirements of IEC 1283 and GB/T 13161-2003 standards. (Exposure, dose, concentration), ASCII code output (EXCEL compatible text document)