OC‑905 pump‑suction portable biogas detector with imported sensors for CH4,CO2,H2S,O2,100000‑group data storage & USB export, two‑stage sound‑light alarm, Ex ib IIC T4 Gb explosion‑proof for biogas plant, landfill and sewage‑treatment safety inspection.
Description:
OC‑905 portable pump‑suction biogas detector adopts famous‑brand original imported sensors and ultra‑low‑power 32‑bit microprocessor. Equipped with built‑in sampling pump with stable 300 ml/min flow rate for active suction sampling, it is customized for biogas components detection (CH4 methane, CO2 carbon dioxide, H2S hydrogen sulfide, O2 oxygen). With four‑layer circuit wiring, intelligent algorithm, multi‑point calibration and temperature compensation, it achieves stable performance and high measuring accuracy. The 2.5‑inch dot‑matrix LCD screen directly displays real‑time biogas‑component concentration data. It supports up to 100 000 groups measurement‑data storage, and historical records can be exported to computer via USB cable. Two‑stage adjustable audible‑visual alarm will activate when any gas concentration reaches preset threshold. Featuring all‑English operation menu, aluminum‑alloy metal housing, Ex ib IIC T4 Gb explosion‑proof grade and IP54 protection grade, this handheld unit is widely applied in biogas digester plant, landfill site, sewage‑treatment plant, farm anaerobic fermentation station and other biogas‑related working sites.
Features:
Used original imported sensors and ultra-low power 32 bit microprocessor
The circuit adopts 4-layer wiring, which is stronger for weak signal processing and anti-interference ability
Intelligent algorithm + multi-point calibration + temperature compensation, more accurate measurement results
2.5 inch dot matrix display interface,reading intuitively
All English operation menu and easy operation.

| Gas type | biogas |
| Working principle | Electrochemical sensor |
| Measuring range | 0~100%LEL or customized |
| Resolution | 0.1ppm 0.1%LEL or customized |
| Concentration unit | %LEL, %Vol, ppb, ppm,mg/m3 |
| Precision | ±≤3%F.S |
| Repeatability | ≤±2% |
| Zero drift | ≤±1%(F.S/year) |
| Sampling mode | Pump-suction sampling (Flow rate of 300ml/minute) |
| Data storage | Can record 100000 group of measuring data |
| Response time | T90≤30s (different gas sensors have different response times) |
| Recovery time | ≤20s |
| Pre-heating time | ≤60s |
| Display | LCD dot matrix display of the Gas type, gas concentration unit, gas concentration data, time, battery status, data storage status; |
| Working temperature | -20℃~50℃(Special requirements need to be customized) |
| Working humidity | 10%-95%RH(non-condensing) |
| Working pressure | 86Kpa~106Kpa |
| Explosion-Proof grade | Ex ib IIC T4 Gb |
| Protection grade | IP54 |
| Alarm mode | Audible, visual. Two-color LED alarm light, sound≥75dB@25cm |
| Shell material | Aluminum alloy metal housing, ABS+PC |
| Power supply | 3.7VDC, 2600mAh,Rechargeable lithium battery DC5V USB charger |
| Charge time | ≤6 hours |
| Working time | ≥12 hours (Normal temperature electrochemical sensor) |
| Power consumption | 0.5W |
| Dimensions | 200.5*64.8*35.5mm (L*W*H) |
| Weight | 0.46KG |
| Accessory | Box, instruction, USB charger , data line |
| Quality standard | GB15322.1-2003,GB3836.1-2010,GB3836.2-2010,GB3836.4-2010,GB12358-2006 |
Application field:
Biogas digester & anaerobic fermentation project inspection
Landfill gas monitoring and biogas‑utilization station test
Sewage‑treatment plant biogas‑related safety patrol
Livestock farm biogas‑generation site detection
Biogas upgrading and biomethane quality‑check work
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 equipment 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
Custom 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
How To Cooperate With Us?
We look forward to collaborating with more overseas gas detector and air quality monitor distributors and partners to advance the development and application of gas detection and air quality monitoring technologies.
Our Address
No. 923, Floor 9, Unit 2, NO.78, Shangding Road, Zhengzhou, China.
Phone Number
+86 15981942832
Contact:Oceanus Team
Mobile/WhatsApp:+86 15981942832
Mobile/WhatsApp:+86 13673683950
E-mail:info@china-oceanus.com
Add:No.923, Floor 9, Unit 2, NO.78, Shangding Road, Zhengzhou, China