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.

Description:
OC-850 portable 3-in-1 gas detector is a professional safety monitoring device for simultaneous measurement of CO(Carbon Monoxide), CO₂(Carbon Dioxide), CH₄(Methane).
The instrument supports natural diffusion sampling and optional 1L/min pump suction sampling, applicable to gas collection in coal mines, biogas digesters, landfill sites, municipal drainage pipelines, underground garages and chemical sewage facilities. Electrochemical module resists damp corrosive gas interference; NDIR infrared CO₂ sensor features low zero drift and long-term stable reading; catalytic bead methane sensor responds rapidly to combustible gas leakage.
Certified with explosion-proof standard and IP65 protection grade, equipped with LCD real-time concentration display, triple alarm system and automatic data recording function. Low power consumption and stable operation, widely used in biogas engineering, municipal pipeline maintenance, coal industry safety management and environmental safety inspection work.
Features:
- Detects 1–5 gases simultaneously
- Compatible with electrochemical, NDIR, PID, and semiconductor sensors
- Flexible gas configuration for different detection environments
- Pump suction or diffusion sampling mode (optional)
- LCD display showing gas concentration, gas type, and alarm status
- High-precision imported sensors for accurate measurement
- Built-in self calibration and zero calibration functions
- Temperature and pressure compensation for reliable readings
- Two-level alarm system: sound, light, and vibration
- Adjustable alarm set points
- One-key factory reset function
- Large capacity rechargeable lithium polymer battery
- Durable PC + TPE housing: anti-slip, waterproof, dustproof, explosion-proof
- Stainless steel filter for better gas flow and sensor protection

Technical Specification:
| Gas Detected | CO(Carbon Monoxide), CO₂(Carbon Dioxide), CH₄(Methane) | ||
| Detection principle | Electrochemical(CO), NDIR Infrared(CO₂), Catalytic Bead(CH₄), Support customized | ||
| Sampling Method | Diffusion type or Pump suction(1L/min) | ||
| Measure Range | CO: 0~1000ppm, CO2: 0~5000ppm, CH4: 0~5000ppm | ||
| Resolution | CO: 0.1ppm, CO2: 0.1ppm, CH4: 0.1ppm | ||
| Precision | ≤± 3% F.S. | ||
| Data store | 9999 groups alarm information | ||
| Response Time | ≤10S | Recovery Time | ≤10S |
| Repeatability | ≤±1% | Linearity error | ≤±1% |
| Zero shift | ≤±1%(F.S/Y) | Display | LCD screen |
| Operating language | English or Chinese | Gas unit | PPM, %VOL, %LEL |
| Temperature | -40~70℃ | Humidity | 0-95%RH |
| Explosion-Proof | ExiaⅡCT4 | Protection level | IP66 |
| Alarm mode | Sound, light and vibration | Operating time | 100hours(off pump) |
| Dimensions | 205*75*32mm | Weight | 300g |
Remark: If you need gas or measuring range not listed on the above, pls send us your details requirments for further discussion.
Applications:
- Biogas digester, biogas power station CH4 leakage monitoring and CO toxic gas safety inspection
- Landfill site, waste pond combustible gas and carbon dioxide concentration monitoring
- Coal mine tunnels, underground working face CO poisoning prevention and methane explosion early warning
- Municipal sewer, underground pipeline routine gas safety maintenance detection
- Underground parking lot, closed warehouse flammable and harmful gas regular patrol inspection
- Livestock breeding farm, organic waste fermentation tank gas component monitoring
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






