The product complies with HJ 734-2014 Determination of Volatile Organic Compounds from Fixed Pollution Sources - Solid Phase Adsorption-Thermal Desorption/Gas Chromatography-Mass Spectrometry; DB44/T 1947-2016 Technical Requirements for Continuous Automatic Monitoring System of Volatile Organic Compound Emissions from Fixed Pollution Sources - Photoionization Detector (PID) Method.
Application Scope
The TH-620 series fixed pollution source VOCs sampler (portable) is a single-channel micro-flow automatic constant flow sampler. The sampler is controlled by microcomputer, realizing full intelligence of the sampling process, full Chinese interface, human-machine dialogue, automatic control, automatic volume conversion, simple and reliable operation. The sampler is mainly used for VOCs sampling using activated carbon adsorption tubes, suitable for safety detection in petrochemical and plastic production enterprises, detection personnel detecting VOC organic volatile gases at a certain leak point or working environment, detection of VOC organic volatile gases in oil tankers, railways, aviation, industrial pipelines, and adsorption tube method sampling or detection of VOCs in fixed pollution source flues.
Instrument Features
•One-piece design: integrates sampling, heating/cooling, flow control and display, and various operation functions on one sampling gun;
•Expandable PID sensor for predictive measurement of VOCs at sampling points, guiding and controlling sampling flow and duration;
•Uses efficient Peltier cooling to ensure volatile organic compounds enter adsorption tube below their boiling point;
•Integrated three-way solenoid valve to ensure only flue gas enters adsorption tube;
•Sampling flow automatic tracking, digital flow display;
•Uses original imported carbon brush-free suction pump, high reliability, long life, strong load resistance;
•Uses high-precision electronic flowmeter to ensure precise measurement of micro-flow, automatic compensation for power fluctuation and load change induced flow variation;
•Has automatic detection of atmospheric pressure and ambient temperature functions;
•Has calendar clock function, timing accurate to seconds;
•Has airtightness detection function;
•Two paths respectively accumulate standard condition volume and actual condition volume automatically; also allows setting of sampling time and sampling flow;
•Has software calibration function, convenient for calibrating instrument pressure, flow and other parameters;
•Users can set standard condition pressure and temperature values for convenient standard condition conversion;
•Has multiple sampling modes such as timed duration, fixed standard condition volume;
•Data automatically saved on power failure or shutdown, sampling resumes on power restoration;
•Has data storage and query functions, can store 2000 sets of sampling data;
•Small size, light weight, easy to carry.
