NMHC Benzenes Gas Chromatography, Shanghai HengPing Instrument and meter Co.,Ltd. (CAT#: STEM-AI-0411-YJL)

NMHC Benzenes Gas Chromatography, model STEM-AI-0411-YJL is manufactured by Shanghai HengPing Instrument and meter Co.,Ltd. The product is injected with a double-tube fixed-volume sampling valve, which can analyze and detect total hydrocarbons/non-methane total hydrocarbons in the exhaust gas of pollution sources in one injection, with good repeatability and high accuracy, and the relative standard deviation is less than 3%;

FID detection limit: DF ≤5×10-12g/s(nC16);
Baseline drift: ≤ 5×10-13A (30min);
Baseline noise: ≤1×10-13A;
Linear range: 107;
Stability time: ≤1h
Temperature range: 8℃-400℃ above room temperature
Temperature control accuracy: ±0.5%
Program order: 8 orders
Lifting rate: 0-39°C/min (adjustment increment 0.1°C/min)
Program temperature repeatability: ≤1%

It can use adsorption sampling/thermal desorption to analyze trace non-methane total hydrocarbons in ambient air;
The application of secondary thermal desorption technology can quickly and accurately analyze benzene series or (TVOC) in ambient air. Compared with the carbon disulfide extraction method of activated carbon tube, it has no laboratory pollution, good repeatability (RSD≤3%), and recovery rate. High (above 95%), 100-1000 times higher sensitivity of the method detector, and faster analysis time.
Full microcomputer control system, computer reverse control (one computer can control N (N≤253) chromatographs, with six temperature control systems; four time program systems.
The chromatograph adopts 10/100M Ethernet communication interface, which can test the remote control and remote data transmission processing and supervision of the instrument. It can be connected to the supervisor of the unit and above, which is convenient for supervisors to implement supervision.
Digital signal output (built-in chromatography workstation) The signal network cable is directly output.
The large-capacity column oven has an automatic back door, which can carry out 8-step temperature programming, and has a near-room temperature control function (8°C above room temperature).
With fault self-diagnosis function, it can display the fault location and nature;
With over-temperature protection function, any way of temperature control exceeds the set temperature, it will automatically stop heating.

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