Envitech Bohemia s.r.o. products

The new Chemiluminescent NO-N02-NOx analyzer, model AC32M, combines our 20 years of experience with its predecessors AC30M & AC31M, with an enhanced electronics package and a modular component parts design. The outcome is an ultra compact and light- rack 3U, easy-to-use, che-miluminescence based analyzer capable of measuring nitrogen oxides at ppb levels. Applied to nitrogen oxides measurement, Chemiluminescence corresponds to an oxidation of NO molecules by 03 molecules. The return to a fundamental electronic state of the excited N02 molecules is made by luminous radiation, detected by the PM tube.

The new model AF22M, sulfur dioxide analyzer, combines years of experience of a wide range of analyzers with an enhanced electronics package and a modular component parts design (measurement module, permeation module, 24V power supply module, analog input-output module, etc.). The outcome is an ultra compact and light- rack 3U, easy-to-use analyzer capable of measuring sulfur dioxide at ppb levels. Applied to SO2 measurement, the universally known UV fluorescent principle consists in detecting the characteristic fluorescence radiation emitted by SO2 molecules. In the presence of a specific wavelength of UV light (214 nm) the SO2 molecules reach a temporary excited electronic state. The subsequent relaxation produces a fluorescence radiation which is measured by a non-cooled photomultiplier tube (PM).

The new NDIR CFC (Non Dispersive InfraRead Gas Filter Correlation) carbon monoxide analyzer, model C012M, combines over 20 years of experience in the NDIR CO measurement with an enhanced electronics package and a modular component parts design. The outcome is an ultra compact and light- rack 3U, easy-to-use, IR CFC based analyzer able to measure carbon monoxide with an excellent stability and accuracy.

The analyzer uses the principle of flame ionization detection (FID) to measure the concentration of hydrocarbons in air. The analyzer`s electrometer measures the current generated by the ionization of the carbon atoms in the flame fueled by a hydrogen/air mixture. To distinguish between `total` and ``non-methane` hydrocarbons, an optional selective converter oven is used to oxidize all the non-methane hydrocarbons. The temperature controlled pneumatics prevents condensation. The flow is automatically adjusted and the instrument is provided with automatic ignition of the flame in case of flame out or power failure.

The MGC101 consists of a single chassis supporting 2 thermal mass flow controllers, an ozone generation module, a mixing zone, a reaction chamber for gas phase titration, and control electronics. The mass flow controllers are calibrated to a NIST (National Institute of Standards and Technology) traceable primary standard. The calibration data consists of a comparison of desired versus actual flow over the full dynamic range of the instrument with linear interpolation between points. Calibration data is stored in non-volatile memory and may be updated by the user with a suitable standard. The MGC101 ozone generator is factory calibrated using a NIST traceable ozone standard. This temperature controlled, ultra-violet (UV) based ozone generator includes a precision photo-optical feedback circuit to compensate for lamp aging effects. The MGC 101 is available in either a standard rack mount or portable configuration.