Krohne Messtechnik
With the new option “WIM”, a 4–20-mA electrical output signal is now available for the variable-area flowmeter VA40. While the flowrate with these glass devices could previously be read only locally, the 4–20-mA output option allows for transmission of the measured value for control or evaluation purposes. With VA40 WIM version, the height of the float is converted into an electrical signal via a Hall sensor chain. This signal can be used for a PLC/DCS, or to record the measured value over a certain period with a data logger. Along with each VA40 WIM, the manufacturer supplies the calibration curve, allowing the customer to assign the exact flow value to any current value. — Krohne Messtechnik GmbH, Duisburg, Germany