Fixed oxygen gas detector for sale. Optional measuring range 0~25% or 0~30%, output signal 4-20mA or RS485. The O₂ gas detector can 24 hours online for oxygen concentration detecting, supports remote control, sound and light alarm, affordable price, reliable manufacturer.

Features

• Oxygen gas detector adopts high precision sensor for accurate gas leak detection.
• Oxygen gas detector is equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
• The O₂ gas detector is compatible with various controlled alarms, PLC, DCS and other control system, and can be remote monitored.
• Explosion-proof design, fast, relaible and stable.
• Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
• Two-stage alarm with sound and light, and the alarm point is settable.
• The oxygen gas detector has self-calibration function, and three standard keys will be used to realize on-site maintenance.
• The O₂ gas detector can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.

Specification

Note: The output signal 4-20mA and RS485 CANNOT be used at the same time.

Fixed Oxygen (O₂) Gas Detector Dimension (Unit: mm)

***Other Common Gases and Ranges Available for Fixed Gas Detectors

Note: Some common gases and the measuring ranges are listed in the above table. For more information, please feel free to contact us.

Tips: Why you need an oxygen gas detector?

Oxygen detection is very important for entering confined spaces and entering certain open spaces below the ground. Other gases with higher density than air (such as gasoline, hydrogen sulfide, etc.) will accumulate in the downward direction, thereby displacing O₂ in the space. There are two concentration points to consider in the detection of oxygen concentration: one is that too low O₂ concentration will cause suffocation, and the other is that excessive oxygen exceeding the constant may cause unimaginable acceleration and enhancement of combustion or other chemical reactions. The concentration of oxygen in normal air is about 20.9%, and the balance (over 78%) is mainly nitrogen, and the rest includes a small amount of water vapor, carbon monoxide and other gases.

Most confined space standards and law enforcement agencies, such as OSHA, use the volumetric concentration of O₂ to determine whether it is insufficient, and the usual lower limit is 19.5%. This is also the lowest alarm point set by most manufacturers on the oxygen gas detector. Some law enforcement agencies also use partial pressure of gas instead of concentration to indicate insufficient oxygen. In this case, if the O₂ partial pressure is lower than 16.3 kPa or 122 mHg, it is deemed insufficient (16 kPa oxygen partial pressure is approximately equivalent to 16.3% oxygen concentration at sea level). The reason for using partial pressure is that the human body relies more on oxygen partial pressure rather than concentration for breathing.