The device won't power on.

1.Press the power button briefly, avoid long presses. 2.Use the reset button at the device's bottom. 3.Connect to a computer for firmware update.

Readings are inaccurate.

1.Ensure the unit is set to μSv/h, the standard for normal areas. 2.Charge the device if the battery voltage is low. 3.Keep away from strong electromagnetic devices during measurement.

The device fails to detect radiation.

Conduct a function test: hold a test source close to the detector and check if the reading increases. Update the firmware if software freeze causes data lock.

How do I switch languages?

Long-press the right button to enter settings, navigate to "Language" with the down button, select English, and confirm with the OK button.

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☢️ Stay Safe, Stay Ahead: Your Pocket Guardian Against Invisible Threats

VERSATILE APPLICATION - Ideal for residential, industrial, geological, and nuclear environments—stay ahead of radiation risks.
SMART MULTI MODE ALARM - Customizable light, vibration, and sound alerts keep you instantly informed of radiation spikes.
USER FRIENDLY INTERFACE - Intuitive LCD display with easy one-handed operation and multilingual support (English/Chinese).
PORTABLE DURABLE DESIGN - Compact, lightweight iron body (200g) fits perfectly in your hand or toolkit for on-the-go safety.
PRECISION RADIATION DETECTION - Built-in GM sensor accurately measures ionizing radiation across 48 KeV-1.5 MeV energy range.

The FNIRSI GC-01 Geiger Counter is a portable, handheld radiation detector designed for professionals and safety-conscious individuals. Featuring a built-in GM sensor, it detects gamma, beta, and X-rays with high precision. Its rechargeable battery and 5 dosage unit switching modes offer versatile monitoring, while smart alarms provide real-time alerts via light, vibration, and sound. Compact and user-friendly, it supports English and Chinese languages, making it perfect for diverse environments including residential, industrial, and nuclear settings.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Brand	FNIRSI
Model Number	GC-01
Product Dimensions	2.69 x 7.8 x 11.99 cm; 200 g
Material	Iron
Power Source	Battery Powered
Included Components	Nuclear Radiation Detector
Are Batteries Included	No
Item Weight	200 g

Geiger Counter Nuclear Radiation Detector - FNIRSI Radiation Dosimeter with LCD Display Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter with 5 Dosing Unit Switching

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