PD-920 portable TVOC analyzerDetection principle:

After entering the vaporization chamber, VOCs are carried into the chromatography column by the carrier gas, which contains liquid or solid stationary phases. Due to the different boiling points, polarities, or adsorption properties of each component in the sample, each component tends to form a distribution or adsorption equilibrium between the mobile phase and the stationary phase. Due to the flow of the carrier gas, the sample components undergo repeated distribution or adsorption/desorption during movement. The components with higher concentrations in the carrier gas flow out of the chromatographic column first, and when the components flow out of the chromatographic column, they immediately enter the detector.

PD-920 portable TVOC analyzerThe ability to convert sample components into electrical signals, with the magnitude of the electrical signal proportional to the amount or concentration of the measured component. The electrical signal is amplified and recorded to form a gas chromatogram.

Using advanced optoelectronic technology principles to analyze organic gas TVOC, it has the advantages of fast response speed, good stability, high sensitivity, strong anti-interference ability, small size, light weight, etc. At the same time, it is equipped with a gas sampling pump for more accurate and fast measurement results. Widely used in petrochemical, industrial production, pharmaceutical and pesticide factory inspection, exhaust monitoring, environmental monitoring, sewage treatment, biopharmaceuticals, home environmental protection, experiments and other fields.

characteristic:

Due to the high viscosity, easy crystallization, and corrosiveness of tar, dust, low boiling point organic compounds, H2S and other sulfides or water vapor, the gas composition is complex and can easily cause blockages and corrosion in analytical systems. In response to the above situation, we have adopted various new technologies to design a targeted system that has the advantages of safety, reliability, corrosion resistance, no blockage, authentic sampling, fast response, and high analysis accuracy.

System functions:

Equipped with a dust filter to remove water

Automatic sampling processing;

Can enhance the automatic calibration system;

Automatic air verification, fault self diagnosis, sound and light alarm;

Automatic high-pressure air blowing maintenance;

Main parameter standard signal output 0~20mA, 0~5V, 4~20mA, 1~5V, RS232/RS485 serial communication interface;

Support STIMcom/ModBus bus instrument network;

LCD 4 × 20 character rotating display of multiple parameters;

Over limit alarm, the alarm limit can be set;

Users can add test project configurations;