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荷蘭Hydrion 
Hydrion 多參數水質測定儀
Hydrion利用離子選擇電極（ISE）進行分析工作。測量系統包含傳感器單元和測量程序：傳感器單元包含傳感器探頭和不銹鋼外殼，測量程序具有操作和數據存儲功能。用戶可獨立完成操作，不再需要將樣品送往別處檢測，節省了時間和經費。
Hydrion開創了一種新的測試概念。所有參數能夠同時測量，測量程序還可自動修正所有干擾因子，提高了測量的準確性和可靠性。
由于不使用添加試劑，這種測量系統分析快速且易于操作，不再需要實驗室分析技能。
Hydrion develops and produces equipment and software for determining water quality and quantity. Hydrion is partner in international projects and provides services related to water monitoring and management.

Water quality
To determine the water quality Hydrion produces and sells electrodes with or without electronics and a device for multi parameter analysis, the Hydrion-10. The Hydrion-10 measures direct and real time pH, EC, T and seven other parameters. Apart from these standard electrodes, the Hydrion-10 contains electrodes for Redox, Na+, K+, Ca++, NH4+, NO3-, SO4--, Cl- or CO2 (HCO3-). The results can be stored in a data logger, send through an online connection to a computer or connected to steering programs for process management.

The Hydrion-line is a unit for simultaneous or sequential sampling of multiple sources, for example drains, pipes, tanks or canals. The samples can be analysed with a Hydrion-10 or other analytical instruments.

Water quantity
The Venturi measurement ramp measures the discharge in small and broad water ways. The ramp is only 2.5 cm high and forms no obstacle.

For determining the moisture tension in soils (pF) Hydrion produces a user friendly and cheap ceramic osmotic tensio meter.

This equipment can also be connected to a datalogger or computer for storage of the data or for on line presentation of the results.

Software
Hydrion develops tailor made software for processing data, wireless connections and interfaces for linking different steering systems.

Consultancy en service
Hydrion sells equipment and carries out monitoring programs, processes data and presents the results.
Hydrion works closely together with Nieuwland. In cooperation with Nieuwland ICT and Nieuwland Consultancy we offer a broad spectrum of consultancies in water related areas. Activities are for example: monitoring, data processing, Geographic Information Systems and visualisations, management support, urban and rural planning.

A maintenance contract covers the costs of standard maintenance of the equipment and replacement of parts.