OC-903 Portable combustible gas detector with internal pump

Product Description

• Most combustible gas readings fail for a simple reason: the sample never reaches the sensor. A diffusion detector left at the top of a pit reads clean while the gas sits at the bottom. OC-903 removes that variable — an internal pump pulls the atmosphere from where you point the probe, at an adjustable 100 to 1000 mL/min, and holds it across a catalytic combustion sensor.

• The combustible channel uses catalytic combustion. Oxygen and toxic gases are read electrochemically, CH4 / CO2 / SF6 by infrared, and TVOC by PID — so a single instrument can cover a combustible channel plus one to three additional gases. Concentration shows in ppm or mg/m³, with temperature and pressure compensation applied to the reading.

• Ex ia IIC T4 Ga and IP65 cover the areas this instrument is normally taken into. It runs from −30 to 60 °C, 0 to 95 % RH non-condensing, at −30 to 100 kPa, and will work under micro negative pressure — the condition inside a duct or a sealed pit. Overload protection, over-charge protection, anti-static and anti-magnetic design are built in, and a 2.4-inch IPS colour screen keeps the reading legible in daylight.

• The menu is in English. Auto-test and data recovery run at start-up, a one-key command restores factory settings, and the pump suction strength is adjustable in steps. The unit runs on a rechargeable lithium battery charged over USB; the kit includes a calibration cap, data line, charger, case and CD.

• An optional temperature and humidity sensor can be added when the site needs ambient conditions recorded alongside the gas reading.

Features:

1. Semiconductor technology of ultra low power 32 bit microprocessor, 24 bit ADC acquisition chip, so with the high accuracy.

2. 2.4 inch IPS industrial grade color screen.

3. Support English language menu.

4. The gas concentration unit support for the ppm, and mg/m3.

5. For 1~4 gas detection, supporting single gas, two gas, three gas and four gas inspection.

6. With the inner pump and the suction strength is adjustable in different level.

7. Explosion proof grade of Ex ia IIC T4 Ga.

Function:

• Inspect the gas concentration and alarm when it up to the preset alarm level.

• With auto-test and data recover function.

• One-key operation to restore to factory default setting.

• Temperature and pressure compensation function.

• Adjustable two stage audible-visual alarm threshold value.

• Powered by rechargeable lithium battery with big capacity.

• Working under the micro negative pressure is available.

• Overload protection, over charge protection, anti static interference, anti magnetic interference, etc.

Technical Specification:

Application Scenarios

1. Manholes, valve pits and utility galleries — lower the probe before entry; the pump reads the bottom of the pit, not the air at the rim.

2. Confined space pre-entry testing — draw the sample from each level of the space at 100–1000 mL/min and log the result before issuing a permit.

3. Gas pipelines and regulator stations — walk the line with the probe and check joints, flanges and valve packing.

4. Fuel stations and LPG storage yards — check pump islands, tank vents and cylinder storage areas.

5. Wastewater treatment and biogas — digesters, sludge wells and gas holders where methane accumulates.

6. Chemical and refining units — combustible channel plus one to three toxic or oxygen channels for the same walk-round.

7. Boiler rooms, commercial kitchens and burners — verify the atmosphere around gas trains and burner fronts.

8. Metallurgy, coking and shipyard work — hot, dirty and often negatively pressured spaces where a pumped sample beats diffusion.

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.

Manufacturing & Quality Control

Every Detail Matters. Every Product Deserves Care.

At Oceanus, quality is considered throughout the manufacturing process. From component inspection and product assembly to performance verification and final inspection, we focus on every detail to ensure our products meet the applicable quality requirements before delivery.

• Product Inspectio

Each product undergoes visual and functional checks to verify component assembly, wiring connections, display operation and basic functionality before delivery.

• Product Aging Test

Aging tests are conducted on applicable products to evaluate operational stability and identify potential issues during continuous operation.

• Calibration & Performance Verification

Measuring performance is verified using appropriate reference equipment and standard gases, where applicable, to help ensure reliable measurement results.

• Final Inspection Before Delivery

Before shipment, products are checked for appearance, accessories, packaging and order-specific requirements to ensure delivery readiness.

Every unit is assembled on our own production line, then put through our in-house quality control before it ships. Each instrument undergoes a full inspection, a burn-in aging test and precision calibration, and is finally standardized against reference gases to verify accuracy at the point of delivery. Nothing leaves our factory untested. We also welcome OEM and ODM projects, and every product is backed by our warranty support. Controlling the process from assembly to final calibration is how we keep quality consistent and respond quickly to custom requirements.

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

E-Mail

info@china-oceanus.com