Sailhero XHS2000B SO2 monitor molecules receive ultraviolet energy and produce characteristic fluorescence for excited-state SO2 molecules when the molecules return to ground state. The fluorescence intensity signal is converted into electrical signal by photomultiplier, and the SO2 concentration in the air is determined by measuring the electrical signal. Using hydrocarbon remover can eliminate the interference on measurement imposed by polycyclic aromatic hydrocarbons (PAHs) in the air. Main Characteristics ● Manual or remote automatic zero/span calibration; ● Automatic self-starting; ● Auto-diagnosis and alarm function; ● Temperature and pressure automatic compensation and correction; ● The hydrocarbon remover is used to completely eliminate the interference on measured value imposed by polycyclic aromatic hydrocarbons (PAHs) in the air; ● It can store and display monitored data, calibration records, alarm records; ● Built-in dynamic data storage can store minute average value for more than one year; ● The light source adopts the pulse working mode, and the life span of the light source reaches more than 6 years; ● Various communication methods for selection, including RS232 or RS485 interface output, voltage output (0~5)V (optional) and current output (4-20)mA (optional). Parameters and Indexes

Analytical method	Ultraviolet fluorescence method
Measurement range	(0~500) nmol/mol
Minimum measurement unit	0.1 nmol/mol
Zero point noise	≤0.25 nmol/mol
Limit of detection	≤0.5 nmol/mol
Measuring noise range	≤2 nmol/mol
Indication error	±1.0% F.S
Precision	≤5 nmol/mol
Zero drift	±1.0 nmol/mol /24h
Measurement range drift	±5.0 nmol/mol /24h
Response time	≤120s
Flow stability	±10%