Endress+Hauser’s continuously innovative product developments extend to devices designed for use in regulated industries such as food, beverage, pharmaceutical and biotech. The level portfolio is no exception and the company is able to offer both limit detection and continuous level measuring instruments. Requirements for level measurement in hygienic applications range from contact to non-contact sensing elements, usually selected based on the medium and process conditions.
Liquid level limit detection
The Liquiphant vibronic switch is used in liquid level limit detection and is ideal for liquid application as the measurement integrity is not affected by adverse properties such as foam build up. All parts of the liquiphant in contact with the process are stainless steel polished or coated to custom requirements. Due to its size the liquiphant allows for ease of mounting in pipelines for empty pipe detection, while improvements in the technology also allow it to be used for density measurement in enhanced quality control applications.
Capacitive level measurement
Capacitive level measurement is one of the oldest techniques for measuring level continuously. The Liquicap capacitive probe is a contact probe which is manufactured from material that complies with aseptic requirements allowing the wetted parts to be sterilised with steam during sterilisation in process (SIP). Capacitive probes are known for their quick response time and are ideal for buffering tanks in filling machines.
Radar level transmitters
Radar level transmitters offer advantages over hydrostatic devices in troublesome applications since the measurement is not affected by changing medium density, temperature or pressure. The Micropilot non-contact radar transmitters can be used in mediums like pastes, slurries and liquids. The use of filters is a further advantage for measuring in agitated process tanks or turbulent environments to achieve accurate and stable readings.
Guided (contact) radar transmitters accommodate both liquids and solids. The cable sensor has measuring ranges of up to 45 metres and with a rod sensor level measurement in liquids is possible. Rod sensors are coated with suitable materials to allow measurement in processes with high sanitary requirements.
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