OC‑840 portable 4‑in‑1 multi‑gas detector simultaneously measures Ex, O₂, H₂S and CO. Equipped with original imported sensors for stable and accurate readings.
It adopts diffusion sampling and supports external pump connection. Audible‑visual‑vibration triple alarm with 75dB loud sound. 3.7V 1800mAh rechargeable lithium battery delivers more than 10 hours continuous operation. IP65 protection grade, Ex ib IIB T3 explosion‑proof rating, durable ABS+PC housing, supplied with aluminum alloy carry case. Certified by CE, RoHS, CNEx, ATEX. Ideal for confined space, mine, underground pipeline, chemical plant, sewage treatment and industrial sites to protect workers from hazardous gas risks.
OC-840 Portable multi gas detector for CO, O2, H2S, Ex

Description:
OC-840 Portable multi gas detector with voice alarm which is applicable for 4 gas detection of the CO, O2, Ex, H2S, with the original imported sensor, with the safe and reliable quality. It’s with the diffusion sampling mode, can be connected with the external pump. The portable gas detector can promise the security for the personnel working under the toxic gas in the harmful environments.
Features:
It used original imported sensor with good quality and high accuracy.
It can be combined with 1~4 different gas sensors for different gas type.
LCD dot matrix display, support both English and Chinese operating menu.
Adjustable preset two-stage alarm level.
With audible-visual-vibration alarm mode, also with the voice alarm.
With a back clip, which is easy to carry when working.
Powered by rechargeable battery with big capacity which support a long working period.

Technical Specification:
| Gas type | Ex, O2, H2S, CO |
| Sensor Type | Catalytic combustion sensor for Ex; Electrochemical sensor for O2, H2S and CO. |
| Sensor life | 2~3 years |
| Measuring range | Ex:0~100%LEL O2:0~30%VOL H2S: 0~100ppm CO: 0~1000ppm |
| Display Information | Gas types, Concentration value, Concentration unit, Time, Battery status, Alarm status, etc. |
| Display | Large screen LCD |
| Alarm Storage | With alarm data storage function, can review the data from the detector.. |
| Sampling mode | Diffusion sampling (Available for connection with external pump) |
| Operating Language | Chinese or English operating menu is able to be changed freely. |
| Alarm Mode | Audible-visual-vibration alarm, sound≥75dB |
| Power Supply | 3.7V, 1800mAh rechargeable lithium battery, continuous working period over 10 hours. |
| Explosion-proof Grade | Ex ib IIB T3 |
| Protection Grade | IP65 |
| Working Environment | Working Temperature: -20℃~50℃ Working Humidity: 0-95%RH (non-condensing) |
| Body Material | ABS and PC |
| Package | Aluminum alloy box |
| Dimensions | 140*73*32mm |
| Weight | 300g (with charger) |
| Warranty | 1 years |
Applications:
The portable multi gas detector used in the gas safety inspection and alarm for industrial scene, such as petroleum refinery, chemical plants, LPG stations, boiler rooms, gas stations, paint spray booths, metallurgy, mining, fire, environmental protection, etc., where need to inspect the gas concentration of the Combustible gas and Toxic gas.
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