How to select a smoke analyzer.

The flue gas analyzer works in two ways.

One is the principle of electrochemical work, the other is the principle of infrared work.

Portable flue gas analyzers in the current market are usually a combination of these two principles, and electrochemical flue gas analyzers are generally made in Fisseseau, Germany and Germany. MRU German is produced in Deutsche for example by the Sky rainbow, and the infrared smoke analyzer is generally made by MRU Germany, Siemens Germany, etc.

We'll give you a brief idea of how to buy a smoke analyzer.

1. Sensors

The measurement units covered by the current mainstream flue gas analyzer consist mainly of two sensors:

1) Electronic chemical sensors:

Advantages:

a Small size: therefore, the handheld machine type is generally electrochemical.

b Cheap: cheaper and, if the budget is lower, a smoke analyzer for electrochemical sensors can be selected.

Disadvantages:

a A slight deviation in accuracy: General error is > 5% of the reading, which meets only national environmental standards.

b Cross-disruption: Electrochemical sensors are vulnerable to interference from other gases, increasing errors in measurements.

c Short life: life expectancy is generally 2-3 years, so replacement is always considered.

2) Non-dispersible infrared sensors:

Advantages:

a The measurements are accurate: the general test results do not exceed 2 per cent of the full range and can be used as analytical precision instruments.

b There is no cross-interference: other gases do not cause test interference with infrared sensors for reasons of measurement rationale.

c Long life: Infrared sensors generally have no life concept, are used for very long periods, are generally more than 10 years old and do not require special maintenance on a daily basis, and are gradually becoming mainstream sensors.

Disadvantages:

a Prices are slightly higher: prices are typically several to ten times higher than those of electrochemical sensors.

2. Sampling systems

The sampling systems for the flue gas analyzer are divided into conventional and heated sampling systems.

1) Conventional sampling systems: alkalis are generally used, high-temperature plastic tubes are used to ensure that gases are not adsorbed.

Application: Short-term tests with lower water content; short-term tests with no acid-free gases.

2) Heating sampling systems: This is the integration of heating functions, based on the conventional sampling system, to ensure that the sample temperature is above 120°C during the sampling process, thus ensuring that no water condensation is present during the sampling process.

Applicable: sample tests with high water content; continuous online tests over a long period of time; acid gases (e.g., Test of NO2, SO2 content;

3. Sampling gas treatment systems

1) soda separators: remove water from liquid form, mainly the handheld type using this dewater treatment system.

Applicable: no acid gases (e.g. Tests of SO2, NO2 ; test tests of the field inspection of the environmental sector; test of the burning efficiency of boilers.

2) Palde Electronic Refrigerator: To reduce the sample temperature to 5 °C in the instant, remove the sample moisture in the instant, and ensure that the sample gas entering the test unit is of a standard temperature and low water content, so that the sensor can be tested accurately.

Applicable: acid gases in the sample gas (e.g. Test of SO2, NO2; Testing of gases containing moisture in the sample gas; Tests of higher temperature gas composition; (b) The devulcanization experiment at the Institute of Higher Studies; Long contact online testing; Pilot projects that must be tested with infrared sensors; (a) boiler burning experiments; Pilot projects related to the development and use of new energy sources.

4. Automatic zero point calibration

Some flue gas analyzers have an automatic zero-point calibration function that is suitable for long-term online continuous testing by no one. This function ensures that the sensors do not drift during the testing process, thus ensuring that the test results are accurate.

Without this function, the instrument can only be manually calibrated and the instrument cannot be tested continuously for long periods of time.

5. Consider the sample characteristics of the test

The characteristics of the gas are the temperature of the flue gas, the amount of water in the sample gas, the type of gas contained in the flue gas and its acidity, special gas conditions, etc.

Example:

a If the concentration of sulfur dioxide is measured in a high-wet environment, the heating sampling system and the Palladium electron cooler must be selected in order to measure the results more accurately.

b Where gas species also have high concentrations of hydrogen, instruments of infrared sensors must be selected to test components of other gases, as high concentrations of hydrogen can be highly disruptive to electrochemical sensors.

VI. MAINTENANCE, RESPONSIBILITY AND PROVIDENCE

Maintenance: is to see if there is a better maintenance service, which will guarantee the quality of the post-sale service.

Places of origin: are important, mainly in terms of product quality and reliability. The best brands of course are the German brand; the United States, the United Kingdom brand; and, finally, other countries and countries.