About this item

Know what you can't see. Measure what matters.

The FNIRSI-GC-03 is a professional-grade electromagnetic nuclear radiation detector with a sensitive Geiger tube. Whether you're monitoring environmental safety, testing household materials, or working in radiology, this compact device gives you real-time dose data with clear visual and audible alerts.

Key Specifications

Feature Detail

Model FNIRSI-GC-03

Colors Black / White

Screen 2.4-inch color LCD

Backlight Adjustable brightness

Power Type-C (5V/1A)

Battery 1500mAh rechargeable

Languages Chinese, English

Sensor Geiger tube

What's Included

· Host unit

· Packaging box

· Instruction manual

· USB data cable (Type-C)

Ideal For

· Home safety – granite countertops, old ceramics, vintage watches

· Outdoor exploration – hiking near historical mining areas

· Professional use – labs, hospitals, industrial sites

· Import/export goods – cargo screening

· Peace of mind – residents near nuclear facilities or power plants

Key Features

· Real-time dose alarm – audible and visual alerts when radiation exceeds set thresholds

· Rechargeable battery – 1500mAh for extended field use

· Adjustable backlight – readable in bright sun or complete darkness

· Compact & portable – fits in a pocket or backpack

· Bilingual interface – switch between Chinese and English

FAQ – FNIRSI-GC-03 Radiation Detector

1. What type of radiation does it detect?

It detects gamma radiation and beta radiation using a Geiger-Müller tube. (X-ray sensitivity is limited – not certified for medical X-ray precision.)

2. Is it calibrated?

Consumer-grade devices like this are factory-calibrated for general use but not certified for legal or medical dosimetry. For professional compliance, annual recalibration is recommended.

3. How long does the battery last?

Approximately 10–20 hours of continuous use depending on backlight brightness and alarm frequency. Charging via Type-C takes 3–4 hours.

4. Can I use it while charging?

Yes – the device operates normally when connected to a 5V/1A USB power source.

5. What is the measurement unit?

Typically µSv/h (microsieverts per hour) and µGy/h. The display shows both real-time and cumulative dose.

6. Does it store historical data?

Some versions of FNIRSI detectors log data. Please check the manual – the GC-03 model may support PC data export via the included cable.

7. Is it safe to carry every day?

Yes. The device itself emits no radiation and is completely safe for daily carry.

8. What is the difference between black and white?

Color only – both have identical specifications.

9. Does it detect electromagnetic fields (EMF) from phones or Wi-Fi?

No – this is a nuclear radiation detector (ionizing radiation). It does not measure non-ionizing EMF from household electronics.

10. How do I set the alarm threshold?

Via the on-screen menu. Default alarm is typically 0.5 µSv/h or as specified in the manual.

11. Is it waterproof?

No – keep away from water and high humidity.

12. Can it detect radon gas?

Not directly. Radon decay products emit alpha particles, which this Geiger tube may partially detect, but a dedicated radon test kit is more accurate.

13. What does the backlight adjustment do?

Allows you to dim the screen for night use or increase brightness for outdoor visibility – saves battery when dimmed.

14. Does it come with a carrying case?

Not listed. Only includes the host, box, manual, and cable.

15. Is this suitable for educational use?

Yes – excellent for science classrooms, physics demonstrations, or student projects on radiation.