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sampling chamber Applications

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    Mercury monitoring for mercury flux measurement

    The Tekran 2537 has been used in numerous published studies to measure the deposition or evasion of mercury from natural or contaminated surfaces (i.e. flux measurements). It is anticipated that many mercury flux measurements will be needed in the future to assess the impact of climate change on mercury cycling in the environment. There are two basic ways to do mercury flux measurements. First, the dynamic flux chamber method utilizes a custom enclosure, with controlled air flow, to measure the inlet and outlet concentration over a selected surface to determine the flux over time. Alternatively, the micrometeorological gradient method uses measured concentrations at two levels above a surface. The perfect tool for both flux measurement methods is the Tekran 1110 Two Port Sampler, so the Tekran 2537 can automatically switch between two distinct sampling points. Ask us how we can help you setup a mercury flux system.

    By Tekran Instruments Corporation based in Knoxville, TENNESSEE (USA).

  • Gas control equipment for Life Science

    QCAL introduces CO2Control for incubators and test chambers. These gas dosing units can be adapted to nearly every incubator or test chamber. The user can set a CO2 concentration up to 30% vol. CO2. The CO2Control measures the actual concentration and adds CO2 from a CO2 gas container. The NDIR CO2-sensor has an excellent long-term stability, which provides years of stable CO2 measurement. Also the other parts as the sample gas pump, valve and fittings are designed for maintenance-free use over years. Humidity effects are compensated upto 95% rh at 37°C, also temperature effects are automatically corrected upto 50°C. The other way to control gas atmospheres in any life science equipment is to use gas mixing units GMS_2CH ( 2 channels ) or GMS_3CH ( 3 channels ) for N2, O2 and CO2. They can match flowrates up to 80 liters per minute with a concentration range up to 100 Vol% O2 and/or CO2.

    By QCAL Messtechnik GmbH based in Oberostendorf, GERMANY.

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