Explosion-proof type oxygen gas analyzer

Model: SY-HG3300-DHEx

Typical application:

> Coal chemical, petrochemical process inspection, safety inspection

> Synthetic ammonia, urea process inspection, safety inspection

> Coal gas recovery from blast furnace, coke oven, converter, vacuum smelting furnace

> Coal gas recovery in non-ferrous metal smelting

> LNG process detection and control

> It is integrated in gas analyzer system, then sale the complete system.


Ion flow oxygen technology:

Oxygen molecules in the measured environment diffuse through the diffusion holes to the negative electrode and flow from the negative electrode through the electrolyte oxygen pump to the positive electrode under the action of the electric field, and then return from the positive electrode to the measured environment. The current flowing through the loop has a corresponding ion current value under different oxygen concentration, there is a function relationship between the ion current value and the oxygen concentration in the measured gas. High resolution, good stability, small drift, low power consumption.

Technical data


Minimum range

0 ~ 10 ppm O2

Maximum range

0 ~ 100 %  O2


≤1%FS /7d (Long run can be less than 0.5%FS)




1% FS


Exd IICT6 Gb

Power supply

AC220V ± 10%, 50 / 60Hz

Power consumption

≤ 60W

Display screen

4.3"  640*480 pixel color TFT screen

Analog output

0/4 – 20mA  ( RL ≤ 500 Ohm )


RS485 ( optional )

Alarm output

2 normally open relays ( passive output),

Contact rate: 5A/30VDC;  10A/250VAC


 Ambient condition

Ambient temperature

5 ~ 40℃

Ambient humidity

≤ 90% RH

Airflow velocity


Placing request

horizontal placement

Mechanical vibration

No strong vibration

Electromagnetic interference

No strong Electromagnetic interference


Gas-sample condition

Gas-sample temperature

5 ~ 40℃

Gas-sample pressure

2 ~ 200 Kpa

Gas-sample flow rate

30 ~ 60 L/h

Gas-sample moisture content

Before entering the instrument, the gas-sample should be dried. After drying, the dew point temperature should be less than 5°C .

Gas-sample dust content

Before entering the instrument, the gas-sample must be filtered out of dust.


Instrument size and weight

Instrument size

448 * 401 * 234 mm

Dimension for mounting

330 * 322 mm

Instrument weight

32 kg