Product Description
This handheld dual‑gas detector supports simultaneous measurement of NH3 (Ammonia) and CH4 (Methane). Adopting high‑quality industrial sensors, it achieves fast response and stable reading for toxic ammonia gas and combustible methane gas. Large LCD screen displays real‑time gas concentration value. Once gas concentration exceeds alarm threshold, audible, visual and vibration multi‑mode alarm will activate immediately. Built‑in data logger can store large amounts of test data for later review and export. Compact lightweight body is easy for operators to carry for routine patrol, biogas tank inspection, manhole and confined space entry operation. It is widely deployed in livestock breeding farm, sewage treatment plant, biogas station, chemical workshop and waste recycling facilities. Effectively protects personnel from ammonia inhalation poisoning and methane flammable explosion risks.

Technical Specification:
| Gas type | NH3 (Ammonia) , CH4 (Methane) |
| Working principle | Electrochemical sensor for NH3 (Ammonia),Infrared sensor for CH4 (Methane) |
| Measuring range | NH3: 0~100ppm, CH4: 0~5000ppm; or customized |
| Resolution | 0.1 ppm or customized |
| Precision | ≤±3%F.S |
| Sampling method | Pump-suction sampling, flow rate of 100~1000mL/min. (Adjustable) |
| Data logger function | About 100,000 group of data capacity. |
| Response time | ≤20s/10s |
| Recovery time | ≤20s |
| Repeatability | ≤±1% |
| Linearity | ≤±1% |
| Zero drift | ≤±1%(F.S/year) |
| Display | Gas type, concentration unit, value, Time, Temperature, Humidity, pump and battery status |
| Concentration unit | %vol, %LEL, ppm, mg/m3 |
| Working environment | Working temperature: -30~60 degree;
Working humidity: 0~95%RH (non-condensing); Working pressure: -30Kpa~100Kpa. |
| Explosion-proof Grade | Ex ia IIC T4 Ga |
| Protection grade | IP65 |
| Alarm mode | Audible-visual-vibration alarm |
| Dimension | 180m’m |
| Weight | 500g |
| Accessory | Box, Instruction, USB charger, Data line, Calibration cap, CD |
Remark: If you need gas or measuring range not listed on the above, pls send us your details requirments for further discussion.
Core Features
- Simultaneous detection of NH3 toxic gas and CH4 combustible gas, no need to switch channels for mixed‑gas working conditions.
- Industrial‑grade sensors deliver quick response, low zero drift and strong anti‑interference performance for complex field environments.
- Audible‑visual‑vibration triple alarm with adjustable thresholds, effective in noisy, dim and high‑humidity work sites.
- Backlit LCD screen clearly shows gas concentration, battery status and time, readable both in strong sunlight and dark space.
- Built‑in data logger supports mass records storage and data export, convenient for safety file archiving and analysis.
- Drop‑resistant ergonomic handheld housing with large‑capacity lithium battery, supports long‑time all‑day on‑site inspection.
- Simple menu operation, one‑key zero reset and calibration, easy for front‑line workers to operate.
- Explosion‑proof design with dust‑proof and water‑proof property, suitable for harsh industrial hazardous areas.
Company profile
We Henan Oceanus is located in Henan, a land with a long history and profound cultural heritage, has been dedicated to the research, development, production, and sales of Gas detection system and Environment equipments since its establishment. With exquisite technology and outstanding quality, we have won widespread recognition in the global marketing.

01. Business areas
As a leader in the field of Gas detector and Air quality monitor system, we Henan Oceanus will be continued to expand its business scope and provide customers around the world with customizable Air quality monitor system of various types and specifications.
02. Values and ideas
Our company upholds the core values of integrity and quality service, focusing more on friendship with our customers. We always adhere to integrity management, customer-centered, and provide a full range of pre-sales, sales, and after-sales services to ensure that customers can be worry-free when using our products.
03. Global Service Network
We have a comprehensive global service network, offering timely, professional pre-sales consultation, after-sales service, and technical support for overseas users. Regardless of where users are located, they can enjoy our attentive and thoughtful service.
04. Customer Service
With excellent products and services, Henan Oceanus Gas detector and Air quality monitor system have been exported to more than 100 countries around the world and have won widespread praise.

Our After-sales service:
1. OEM service for LOGO, model, Technical Parameters, Operation manual, etc.
2. Free calibration service and provide calibration methods.
3. One year warranty and lifetime warranty
Our address:
No. 2206, Wenhua Chanye Building Block B, No. 77, Shangding Road, Zhengzhou Area, Henan Pilot Free Trade Zone
Email: info@china-oceanus.com
Telephone: +86 0371 60998169
Mobile/Whatsapp: +86 15981942832
Mobile/Whatsapp: +86 13673683950





