Description:
- H₂S & NH₃: Adopt high-stability dedicated electrochemical sensors to detect malodorous and corrosive toxic gas from sewage and breeding industry;
- EX Combustible Gas: Catalytic combustion sensor to monitor explosion limit of methane, biogas and flammable volatile gas to prevent fire & explosion;
- CO₂: NDIR non-dispersive infrared sensor, anti-poisoning and long service life, judge ventilation condition and hypoxia risk in enclosed areas.
The instrument supports built-in pump suction (1L/min flow) and diffusion dual sampling modes. The sampling tube can stretch into manholes, sludge tanks, biogas tanks and sealed containers for targeted gas sampling testing. LCD color screen synchronously displays four groups of gas concentration, unit and alarm status, and stores up to 9999 groups of alarm records for environmental filing and hidden danger traceability.
Equipped with Ex ib IIB T3 explosion-proof grade and IP65 dustproof & waterproof shell, it can work continuously for 100 hours under diffusion mode. Widely applied in sewage plant daily patrol, landfill biogas monitoring, chemical tank area inspection, gas station maintenance and confined space pre-entry safety assessment.

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 | H₂S Hydrogen Sulfide, NH₃ Ammonia, EX Combustible Gas, CO₂ Carbon Dioxide | ||
| Detection principle | H2S/NH3: Electrochemical, EX: Catalytic Combustion, CO2: NDIR Non-Dispersive Infrared | ||
| Sampling Method | Diffusion type or Pump suction(1L/min) | ||
| Measure Range | H2S: 0~100ppm, NH3: 0~100ppm, Ex: 0~100%LEL, CO2:0~10000ppm; Support customized | ||
| Resolution | H2S: 0.01ppm, NH3: 0.01ppm, Ex: 0.01 LEL, CO2:1 ppm | ||
| 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:
- Sewage treatment plant inspection well, sludge tank H2S & NH3 routine safety monitoring
- Domestic waste landfill & biogas station combustible gas leakage and CO2 hypoxia inspection
- Chemical fertilizer factory and ammonia tank area toxic gas and flammable hidden danger troubleshooting
- Municipal sewer and manhole pre-entry four-gas comprehensive safety assessment
- Oil depot, gas station and storage tank area volatile flammable gas patrol inspection
- Closed cellar, grain silo and sealed tank ventilation and gas risk testing
- Environmental protection law enforcement on-site sampling of malodorous waste gas and greenhouse gas emission
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





