Model: aqms-1000 ultraviolet fluorescence analyzer.
(1) Technical principles
The sulfur dioxide analyzer uses ultraviolet fluorescence technology for detection. The optical system is mainly composed of light source, gas chamber, PMT, reference detector, etc. during measurement, the ultraviolet light source emits 214nm light, and generates 330nm fluorescence through SO2 analysis excited by the gas chamber. The fluorescence intensity has a linear relationship with SO2 concentration. The reference detector is used to detect the light source intensity, and PMT detects the fluorescence intensity, root SO2 concentration is calculated according to the light intensity of reference detector and PMT detector.
(2) Technical parameters
| 因素 | 均值 |
| 測得範圍 | 0~500ppb、大區域0~20,000ppb(調節) |
| 組織 | ppb，ppm，ug/m3，mg/m3 |
| 0點噪聲源 | <0.2ppb(RMS) |
| 低于檢測限(LDL) | 0.4ppb |
| 0點漂移 | <1ppb/24時間 |
| 量限漂移 | <5ppb/24H |
| 卡死周期 | <120s |
| 波形 | <1%/FS |
| 反復相對偏差 | <1% 50ppb |
| 抽樣用戶流量範圍 | 800cm3/min±10% |
| 室內環境的溫度 | 5℃~40℃ |
| 面積（H×W×D） | 178mm×432mm×613mm |
| 載重量 | <15kg |
| 電原 | 200V~240V、50/60Hz、400W |
| 虛擬仿真輸出 | 10V、5V、1V、0.1V(先選) |
| 通信網絡規格尺寸 | RS232、RS485 |
(3) Functional features
■ using UV fluorescence technology
■ stable flow control system
■ pressure compensation and temperature compensation options
■ external AC mechanical vacuum pump
■ use electronic flow sensor to detect and display sample gas flow
■ high efficiency hydrocarbon remover and unique optical design, strong anti-interference ability
■ self check function of light source intensity attenuation
■ timing dark current compensation, high stability
■ continuous self check with alarm function
■ task software allows monitoring of test data during operation
■ bidirectional RS-232 port for remote operation
■ adaptive signal filtering technology to optimize response time
■ color display, touch screen operation
■ large capacity memory, automatic storage of historical data
■ automatic monitoring of instrument parameters
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