feature: 

1. High Sensitivity: Professional counter, core radiation detector with built-in acoustic and visual signals for capturing the extent of radiation. A highly developed GM tube is used as the core sensor. It features automatic data logging. The LCD screen allows you to quickly and accurately read the required data for recording natural background radiation and artificial radiation. 

2. Radiation detection: The nuclear radiation detector uses a complex GM tube as the core sensor, with small error and high precision of 0.01 UPS/h, ensuring accurate measurement, high sensitivity, wide measurement range and lasting benefit. Measurement range: electric field: 1V/M ~1999V/M; Magnetic Field: 0.01μT~999.99μT. 

3. Security monitoring: developed a nuclear electromagnetic radiation tester with data display, memory and output functions. And built-in timer shutdown, threshold alarm function. If you are in the environment with electromagnetic radiation for a long time, it will cause great harm to our body. We need nuclear radiation detectors to help us.

 4. Portable and lightweight: The user interface is small and portable, concise and easy to use, small and portable Geiger counter, JD-3001 nuclear radiation detector with portable design, you can put it in your bag and take it with you. Geiger Counter Radioactive Nuclear Radiation Detector, Geiger Counter Physical X-ray Test Professional Marble Detector with LCD Display. 

5. Wide range of applications: professional portable Geiger radiation protection and high precision and stability of products, widely used in material testing and radiation testing, very suitable for daily use, hospital, industry, etc. It can be used for material testing, environmental testing, radiation protection, radiopharmaceutical testing, etc. specification: model: Operating temperature: 0℃~ 50℃ Operating humidity: relative humidity 10%RH ~ 80%RH Nuclear radiation: Response time: 3s Dose rate response: <±20% (1μSv/h~99.99mSv/h) Energy response: <±30% (48KeV~1.3MeV) Relative inherent error: <±15% Electromagnetic radiation: Unit: Electric field: V/M; Magnetic field: μT Accuracy: Electric field: 1V/M; Magnetic field: 0.01μT Alarm threshold: electric field: 50V/M; magnetic field: 0.3μT Measuring range: Electric field: 1V/M ~ 1999V/M; Magnetic field: 0.01μT ~ 999.99μT Power supply: built-in 3.7V lithium battery. Package Included: JD-3001 host*1 Data cable*1 Manual*1 Note: Due to the color deviation of the pictures taken by the mobile phone, the actual color shall prevail. Thanks! !

 product description: 

① Digital temperature and humidity sensor. 

② LCD display. 

③ Mute button: Turn the alarm sound on or off. Default is to turn on sound. 

④ "+" button: Quickly switch between nuclear radiation detection and electromagnetic radiation detection. During menu setting, the cursor moves up and increases the value.

 ⑤ Power button: Press and hold for 2 seconds to turn the power on or off. 

⑥ Temperature unit selection button: Convert between Celsius and Fahrenheit.

 ⑦ "-" button: short press to start recording data, the screen will show " " symbol. During menu setting, the cursor moves down and decreases the value. ⑧ Setting button: short press to enter the menu, long press for 2 seconds to exit the menu. Menu function introduction: 1. Short press the "SET" key to enter the menu page, long press the "SET" key to exit the menu page. 

2. Language setting: 4 operation pages are provided: Chinese, English, Japanese and Russian. Move the cursor bar to the desired option and press the "SET" key to confirm. Long press the "SET" key to return to the previous operation page. 

3. Function switching: move the cursor bar to the desired option, and press the "SET" key to confirm. Long press the "SET" key to return to the previous operation page. Press the "+" button to quickly switch the main page. 

4. Time setting: move the cursor bar to the desired option, short press the "SET" key, the background turns red, press the "+" key or "-" key to set. Long press the "SET" key to return to the previous operation page.

 5. View data: move the cursor bar to the desired option, short press the "SET" key to view the recorded data. Long press the "SET" key to return to the previous operation page. It can store up to 7 days of data, please connect the important data to the computer through the data cable to export. 

6. Timed shutdown: move the cursor bar to the desired option, and press the "SET" key to confirm. The default is 5 minutes to shut down. The " " icon is displayed on the screen. Long press the "SET" key to return to the previous operation page. 

7. Alarm value setting: move the cursor bar to the desired option, short press the "SET" key, the background turns red, press the "+" key or "-" key to set. The figure on the left shows the default alarm thresholds. Long press the "SET" key to return to the previous operation page. 8. Recording interval: move the cursor bar to the desired option, short press the "SET" key, the background will turn red, press the "+" key or "-" key to set. The default logging interval is 1 second. Long press the "SET" key to return to the previous operation page. Press the "-" button to quickly switch the main page.