OC‑905 pump‑suction portable TVOC gas detector with imported sensor, 100000‑group data storage & USB export, two‑stage sound‑light alarm, Ex ib IIC T4 Gb explosion‑proof for indoor environment and industrial TVOC safety detection.
Description:
OC‑905 portable pump‑suction TVOC gas detector adopts famous‑brand original imported sensor and ultra‑low‑power 32‑bit microprocessor. Equipped with built‑in sampling pump with stable 300ml/min flow rate, it realizes active suction sampling for total volatile organic compounds. Featuring four‑layer circuit wiring, intelligent algorithm, multi‑point calibration and temperature compensation, the detector delivers high‑accuracy and stable measurement results. The 2.5‑inch dot‑matrix LCD screen directly shows real‑time TVOC concentration data. It supports up to 100 000 groups data storage and data export to PC via USB cable. Two‑stage adjustable audible‑visual alarm will activate when gas concentration reaches preset threshold. With 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 petroleum‑petrochemical, chemical industry, home environmental protection, laboratory, sewage treatment and other sites requiring TVOC hazard detection.
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.

Function:
Inspect the gas concentration and alarm when it reaches preset alarm level.
High accuracy, good stability and good repeatability, long working life.
One-key operation to restore to factory default setting.
Adjustable two-stage audible-visual alarm threshold value.
Powered by rechargeable lithium battery with big capacity.
The built-in pump, stable flow rate, can be opened or closed.
Technical Parameter:
Gas type | TVOC |
Working principle | PID sensor |
Measuring range | 0-1.000ppm、5ppm、10ppm、20ppm、50ppm、100ppm、200ppm、2000ppm、10000ppm、20000ppm or customized |
Resolution | 0.1ppm 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 Scenarios
Home environmental protection & indoor air quality inspection
Chemical plant volatile organic gas monitoring
School laboratory gas safety test
Sewage treatment plant on‑site patrol inspection
Petrochemical and painting workshop TVOC leakage detection
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