Detailed explanation of sulfur dioxide detection equipment - Q&A

Sulfur dioxide, as an acidic oxide, has bleaching properties, which can bleach most colored substances such as pulp, wool, silk, straw hats, etc.; It can also react with water to produce H2SO3 sterilization and disinfection.

Sulfur dioxide, with the chemical formula SO2, is a colorless gas with a strong pungent odor under normal conditions.

The molecular weight of sulfur dioxide is 64.07. Relative density 2.264 (0°C). Melting point -72.7°C. Boiling point -10°C. Easy to liquefy. The solubility is 8.5% (25°C) in 338.32kPa water, and the volume ratio is about 40 volumes of sulfur dioxide dissolved in a single volume. It is soluble in water, and the concentration of saturated solution is 1.7mol/L. Sulfur dioxide is an anhydride of sulfurous acid, which is soluble in water to form sulfurous acid, which is easily soluble in methanol and ethanol. Soluble in sulfuric acid, acetic acid, chloroform and ether, etc.

Density of sulfur dioxide under standard conditions = 64 g/22.4L = 2.86 g/L

Sulfur dioxide is a toxic gas, and people with heart and respiratory diseases are most sensitive to this gas, that is, normal people can get sick if they stay too long in places where sulfur dioxide concentrations are too high.

The effects of different concentrations of sulfur dioxide gas on the human body

Sulfur dioxide is one of the most important air pollutants, mainly from the combustion of coal and oil (accounting for 90% of the SO2 polluting the atmosphere), followed by the exhaust gas of sulfide mine metallurgy and sulfuric acid plants. Sulfur or sulfide burns in the air to form sulfur dioxide.

    In order to prevent sulfur dioxide leakage and safety accidents caused by it, it is recommended to use Beijing Oriental Jihua sulfur dioxide detection equipment:

The specific parameters of various types of testing equipment are as follows:

        ² High precision, error less than 0.2%F.s, good anti-interference ability;

        ² Receiving standard signals: 4-20mA, 2-wire or 3-wire probes are acceptable, and 24V power supply can be provided for the probe;     Optional host with four channel counts: 1, 2, 4, and 8; Each channel is connected with a probe, and the number of channels is indicated when ordering;

        ² Alarm points and all parameters can be set by button;

        ² Each channel has two alarm outputs; Switching Passive Contact Output 220VAC, 2A

        ² It can set low and high limit secondary alarms, or upper and lower limit alarms, with delay alarm function (some models);

        ² The host can correct the data of the detection probe and remotely adjust the zero point;

        ² Optional RS485/232 communication function, set all parameters through computer, and carry out real-time monitoring and communication.

        ² Operating voltage  220V AC

        ² Temperature range: 0~70°C

        ² Humidity range: 10~90% RH (non-condensing)

        ² Accuracy   : 0.2% F.s (0.5% F.s for single channel)

        ² Installation method: wall mounting

        ² Weight   : about 1.2kg (single/dual channel), 3kg (multi-channel)

        ² Dimensions: 200X200X80mm (single/dual channel), 350X450X100mm (multi-channel host)

According to customer needs, it can be equipped with Antai Jihua on-site digital display probe, or Antai Jihua switching volume probe, and can be equipped with an optional sound and light alarm.