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flow switch controller Applications

  • Constant Pressure pump control valves

    For use with water well pumps and booster pumps, the Cycle Stop Valve (CSV) turns any pump into a variable flow, constant pressure system. Working in conjunction with a small pressure tank, the CSV is usually adjusted to the middle of the pressure switch range. IE; 40/60 PSI switch, 50 PSI CSV. The size of the pressure tank determines how much water can be used by the house, before the pressure drops to 40 PSI, and the pressure switch starts the pump. As long as flow rates in and around the house vary from 1 GPM to as much as the pump can produce, the CSV maintains a constant 50 PSI on the system. When there is no more flow required for the house, the CSV allows the little pressure tank to fill to 60 PSI, and the pump is shut off by the pressure switch.

    By Cycle Stop Valves, Inc. based in Lubbock, TEXAS (USA).

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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).

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