Honeywell EW457 Series mechanical flowmeters are used for
flow measurement of heating water in hydronic heating
They are typically used with an EW545 Series energy
calculator. The combination of flowmeter and energy
calculator has the same functionality as a heatmeter.
EW457 Series flowmeters are equipped with a reed switch for
pulse output to a calculator.
EN1434 approval (DN50, DN65, DN80, DN150 and DN200)