For the continuous measurement of Volatile Organic Compounds and Hydrocarbons (Total and Methane), with a short response time, 98% of full scale detection in approximately 1 second.

Model 110H has been designed, developed and manufactured following the latest UNE regulations for the continuous measurement of VOC, THC and CH4 in emissions. The sample is extracted through a variable length probe which includes a ceramic filter at its end (porosity 3mm) a heated line (150-200ºC) and a heated suction pump. The monitor includes a PC based datalogger with a high definition liquid crystal display which can show: - Diagrams - Working temperatures - Operation status - Alerts - H2, Air and sample flow graphs - Data stored in memory - Average values measured in real time

A second, heated, steel filter is also included, to be placed at the entry of the sample capillary. The sample is fed continuously to the FID detector, so the response is very rapid, up to 98% full scale detection in 1 second. The measurement of the Methane (CH4) fraction can be carried out continuously by the manual selection of a four-way valve which directs the sample to a converter which processes all organic compounds except for Methane into CO2, which does not produce a signal in FID detectors.

All data collected is stored in a 3.5" floppy disk which is available for the user to manipulate or export to a spreadsheet. They can also be viewed in a remote PC via the RS-232 port or Ethernet connection (optional) controlled by the software package supplied with the system. The appropriate connections with remote control and supervision equipment are easily made. A safety electrovalve interrupts the hydrogen supply in case the flame goes out.

A hydrogen fuelled microflame is used as detector for organic compounds, since the oxidation reaction of Carbon compounds (Cx=CO) which takes place at its heart generates a consistent quantity of ions which is proportional to the concentration of organic Carbon present in the sample.

Firstly, the structure of the detector mixes hydrogen and sample gases, then the mixture burns in an oxygenated atmosphere (pure air with a stequiometric excess). The electric charges generated by the combustion of the organic matter in the sample are collected by a pair of polarized electrodes and converted into electrical microcurrents. These ionization currents generate tension variations in the electrometer and are transferred to a high resolution TFT-LCD screen.

The instrument incorporates internal memory with high storage capacity. The data shown in the screen can also be stored and/or treated in the following ways: - Registered in graphical form. - Printed. - Sent to a PC.

Because of its rapid response, this monitor is particularly adequate for L.E.L. applications, in industrial processes for the control of solvents and organic compounds as well as monitoring of incinerator chimneys and combustors.