📁 Manuals & FirmwaresDownload
Highlights
◉ 2.0" Full-Color TFT Display – Real-time gas concentration and temperature/humidity, adjustable brightness, day/night UI.
◉ Curve Analysis & Fast Refresh – Trend curve monitoring with 0.5s refresh for real-time data visualization.
◉ Multi-Gas Detection – Detects methane, propane, and isobutane; methane range 0–50000ppm, 1ppm / 1% LEL resolution.
◉ Flexible 36cm Probe – Easily detects gas in narrow or hard-to-reach spaces.
◉ Triple Alarm System – Buzzer, vibration, and indicator light with up to 30 alarm records.
◉ Fast Response & Durable – <5s response, sensor lifespan >3 years, works in -10~55℃ and resists electromagnetic interference.
◉ Data Hold Function – Records measurement results for easy tracking and analysis.
◉ Portable & Convenient – Lightweight (≈296g) with built-in flashlight for low-light conditions.
◉ Performance Upgrades – Supports USB Type-C firmware updates to optimize device performance.
The GD-02 is a reliable color-screen gas detector for methane, also tracking temperature and humidity. It delivers fast, accurate readings, quick startup, rapid zeroing, and resists low temperatures, poisoning, and interference. Durable and precise, it maintains performance for over 3 years.
Please make sure to read the user manual carefully before use to understand all safety instructions and precautions.
Please make sure to read the user manual carefully before use to understand all safety instructions and precautions.
Features
- 2.0" Full-Color TFT Display – Real-time display of gas concentration and ambient temperature/humidity with 0.5s refresh rate.
- Curve Analysis & Data Recording – Supports trend curve analysis and record tracking for more intuitive monitoring.
- Adjustable Brightness & Dual UI Themes – Switch between light/dark modes for day and night environments.
- Multi-Gas Detection – Accurately detects methane, propane, and isobutane.
- Wide Detection Range – Methane detection range of 0–50000ppm with 1ppm / 1% LEL resolution.
- 36cm Flexible Probe – Easily detects in complex, narrow, or hard-to-reach spaces.
- Triple Alarm System – Audible, vibration, and visual alerts ensure timely safety warnings.
- Alarm Record Storage – Saves up to 30 alarm records for easy tracking and review.
- Fast Response & Recovery – <5s response time (T90) and <10s recovery time (T10) for rapid hazard detection.
- Long Sensor Lifespan – Durable sensor with over 3 years of reliable service.
- Rugged Environmental Adaptability – Operates in -10~55℃ with strong resistance to electromagnetic interference.
- Lightweight & Portable Design – Weighs approx. 296g, with a built-in flashlight for low-light or emergency use.
- Performance Upgrades & Data Hold – Supports USB Type-C firmware updates and data hold function for recording and analysis.
Specifications:
Model
GD-02
Screen Material
2.0-inch Color Screen
Detectable Gases
Methane, Propane, Isobutane
Measurement Range
0~50000ppm (Methane)
0~100 (A%LEL)
0~100 (A%LEL)
Resolution
1ppm/1%LEL
Measurement Range (%LEL)
0~100
Operating Temperature
-10~55℃
Warm-up TimeResponse Time
Around 15-16 seconds
Response Time (T90)
<5s
Recovery Time (T10)
<10s
Service Life
>3 years
Sampling Time
≈0.5s
Size
≈63×28×139(+360)mm
Product Weight
≈296g
Languages
Simplified Chinese / English
Package List:
◉ GD-02 Host *1
◉ Type-C Charging Cable *1
◉ Storage Case *1
◉ User Manual *1
◉ Packaging Box *1
◉ Type-C Charging Cable *1
◉ Storage Case *1
◉ User Manual *1
◉ Packaging Box *1
⚠ Precautions
Situations to Strictly Avoid
- Avoid exposure to volatile silicon compounds (adhesives, hairspray, silicone, etc.), as they can permanently reduce sensor sensitivity.
- Do not expose the sensor to high concentrations of corrosive gases (H2S, SOX, Cl2, HCl) to prevent corrosion or irreversible performance degradation.
- Avoid contact with alkalis, alkali metal salts, or halogens (e.g., Freon) to prevent performance deterioration.
- Do not allow the sensor to get wet or be submerged, as this can reduce sensitivity.
- Avoid ice formation on the sensor surface, which can crack the sensitive layer and cause failure.
- Do not apply voltage exceeding the specified value, as it can damage leads or the heater and reduce sensor sensitivity.
Situations to Avoid That May Reduce Sensor Performance
- Minor condensation has little effect, but prolonged water on the sensor surface can degrade performance.
- Long-term exposure to high gas concentrations affects sensor performance; direct spraying (e.g., lighter gas) can cause severe damage.
- Prolonged exposure to extreme conditions (high humidity, temperature, or pollution) can severely affect sensor performance.
- Frequent or excessive vibration can break internal sensor leads, such as during transport or pneumatic/ultrasonic assembly processes.
Prohibited Conditions
- The sensor detects gases; do not allow any part to come into contact with liquids.
- Do not plug/unplug or disassemble the sensor module.
- Do not modify or move any electronic components.
- Keep the sensor’s ventilation area clean; blockage can reduce sensitivity and slow response.
- Avoid excessive impact or vibration; ensure the structure is intact, otherwise output may be unreliable.
- After long-term exposure to high gas concentrations, recovery is slow; recovery speed is proportional to overrange levels.
- Do not disassemble the sensor; doing so will cause damage.
Using Environment and Precautions
The device should be stored in a soft case, and the operating environment should be at a temperature of -5~40℃, and the relative humidity should not exceed 80%.
The device should be stored in a clean and dry place to avoid moisture, mold, heavy pressure, mechanical damage,humidity and direct sunlight.
Avoid using in the rain or fog, avoid dropping or shocking.
When the screen on the LCD does not light up, it indicates that the voltage is too low, and it needs to be charged in time.
Copyrights
The product specifications are subject to change without notice, allfinal interpretation rights were reserved by FNIRSI Technology Co., Ltd, All trademarks, product images，technical parameters are properties of FNIRSI Technology Co.. Ltd. All rights reserved.
Warranty
30-Day return and refund guarantee (Refer to our Refund Policy), 2-year warranty (only available for orders purchased directly from fnirsi.com), lifetime technique support by FNIRSI.
Please feel free to reach us with any concerns:
Email: service@fnirsi.com / info@fnirsi.com
We strive to reply to you within 24 hours.
FNIRSI has started researching and development manufacturer of quality optical products including Golf rangefinder, laser,measure device and binoculars since 2016.
Focus on the development,researching, and manufacturing for over 8 years.
We are committed to delivering premium products and exceptional customer service, striving to be your most reliable and intelligent assistant.
At Fnirsi, we are committed to providing our customers with the best value for their purchases. To ensure you always get the best price, we offer a 30-day price guarantee on all products purchased directly from fnirsi.com. This policy aims to give you confidence and peace of mind when shopping with us.
What is the 30-Day Price Guarantee?
Our 30-day price guarantee means that if you purchase a product from fnirsi.com and the price of that product drops within 30 days of your purchase date, you are eligible for a refund of the price difference of the products. (Prices are based on USD. No refunds will be given for price changes in other currencies due to exchange rate fluctuations.)
How Does the Price Guarantee Apply?
- Eligibility: The price guarantee applies only to purchases made on fnirsi.com. Products purchased from other retailers or third-party sellers are not eligible.
- Timeframe: The price drop must occur within 30 days of your original purchase date.
- Product Match: The price guarantee applies to the same product (identical model, specifications, and condition).
How to Apply for a Price Difference Refund
If you notice that the price of a product you purchased from fnirsi.com has dropped within 30 days, follow these steps to apply for a refund of the price difference:
- Documentation: Prepare your order number and proof of the price drop (such as a screenshot and link to the product page showing the reduced price).
- Contact Us: Reach out to our customer support team at info@fnirsi.com .Include your order number, proof of the price drop, and a brief explanation of your request.
- Verification: Our team will verify the price drop and your purchase details.
- Refund Process: Once verified, we will process the refund for the price difference to your original method of payment. It typically takes 1-3 business days for you to receive the refund.
At Fnirsi, we strive to provide our customers with high-quality products and exceptional customer service. Our 30-day price guarantee is just one of the ways we ensure you get the best value for your investment. Shop confidently with Fnirsi, knowing that you are always getting the best deal available.
Thank you for choosing Fnirsi. If you have any questions or need further assistance, please do not hesitate to contact our customer support team at info@fnirsi.com.
- Choosing a selection results in a full page refresh.