OC-905 Portable helium gas detector with built‑in pump suction, thermal conductivity sensor, multi‑alarm function, data record & export, for industrial helium leak detection and concentration monitoring.
This portable helium gas detector is equipped with a built‑in sampling pump for active suction sampling, realizing rapid and accurate helium concentration measurement and leak inspection. Adopting high‑precision thermal conductivity sensor, it delivers stable readings and fast response, supporting remote sampling with extension probes for hard‑to‑reach areasAlibaba.co.... The high‑definition color screen displays real‑time gas value clearly, with adjustable audible, visual and vibration alarms to warn users once concentration exceeds set thresholds. Built‑in large‑capacity rechargeable battery ensures long‑time field operation. It supports data logging and USB data export for on‑site record‑keeping and post‑analysis. Compact and lightweight, explosion‑proof and dust‑resistant design fits industrial leak checking, laboratory testing, helium recovery and other field working conditions.
‑ Helium pipeline leak inspection ‑ Pressure vessel & tank tightness testing
‑ Welding shielding gas monitoring ‑ Helium recycling station detection
‑ Laboratory gas composition analysis
‑ Aerospace component leak test
‑ Semiconductor manufacturing workshop
‑ Refrigeration equipment maintenance
Technical Parameter:
| Gas type | Helium (He) |
| Measuring range | 0~1000ppm, 100%vol or Customized |
| Working principle | Electrochemical sensor |
| Resolution | 1ppm, 0.01%vol |
| Precision | ±≤3%FS |
| Repeatability | ≤±1% |
| Zero drift | ≤±1%(F.S/year) |
| Sampling mode | Pump-suction sampling (Flow rate of 300ml/minute) |
| Data storage | Can record 300000 group of measuring data |
| Response time | T90≤20s |
| 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; |
| Concentration unit | %vol, ppm, mg/m3 |
| Working environment | Working temperature: -20℃~60℃ Working humidity: 10%-95%RH(non-condensing) Working pressure: 86Kpa ~ 106Kpa |
| Explosion-Proof grade | Ex ib IIC T4 Gb |
| Protection grade | IP65 |
| Alarm mode | Audible, visual |
| Shell material | Metal |
| Power supply | 3.7VDC, 2800mAh,Rechargeable lithium battery DC5V USB charger |
| Charge time | ≤6 hours |
| Working time | ≥24 hours |
| Dimensions | 135*65*35mm |
| Weight | 0.5KG |
| Accessory | Box, instruction, USB charger , data line |
| Quality standard | GB15322.1-2003,GB3836.1-2010,GB3836.2-2010,GB3836.4-2010 |
Features
Adopt high‑precision electrochemical He sensor, fast response
Real‑time LCD screen display gas concentration value
Sound, light and vibration triple alarm reminder
Can record 100,000 groups of data for later review
Explosion‑proof design, suitable for complex industrial site
Low battery reminder, easy handheld portable design
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