Analysis and Comparison of VOCs Monitoring Technology
Analysis and Comparison of VOCs Monitoring Technology Sensor technology: Common sensors for PID, FID; PID sensor response to low alkanes; FID sensor sensitive to hydrocarbon; Both monitoring accuracy up to PPb, but can not distinguish between VOCs species; Commonly used in hazardous area alarm, indoor air monitoring ; Chromatography: The total amount of VOCs and characteristic components can be measured by column separation; however, the analysis cycle is long; it is generally used for on-line monitoring of fixed pollution sources; Mass spectrometry technology: high sensitivity (ppt), short response time, measurement of many components, no calibration; but the price is relatively expensive; generally used in laboratories, hospitals, environmental emergency / traceability monitoring; Spectral Technology: Commonly used technologies are FTIR, DOAS, TDLAS; fast response, generally used for regional ambient air monitoring / pollution source monitoring. Knitwear Automation Equipment,Automatic Circular Knit Collar Attaching Roller,Automatic Knit Circular Bottom Hemming Roller,Short Sleeve Double-Needle Interlock Machine Ngai Shing Development Limited , https://www.ngaishinghk.com