Welcome to KEM -

Your Partner for Flow Measurement and Control

  • Language Selection

Carrier-Frequency Pulse Amplifiers (VTE Ex)

with single pickup, with terminal connection for screwing in for all KEM flow meters

The carrier frequency pickups detect the r.p.m. of KEM flow meters. Each passing of a tooth will be detected contactless and produces a pulse at the output.Therefore each pulse corresponds to a fixed volume and the frequency corresponds to the volume flow. Suitable for the application there are versions with different outputs available: 3-wire npn, NAMUR, open collector and 3-wire pnp (not available for the Ex version).

The pickup is screwed into the meter via a thread M14×1.5 (option UNF ½”-20). Accordingly the VTE Ex fits on all KEM measuring cells. The electrical connection takes place via screw terminals in the housing.


Technical Data

  • Supply Voltage: UB: +7 up to 29 V DC
  • Quiescent Current: IR < 4 mA
  • Frequence Range: 3 up to 3,000 Hz depending on flow meter
  • Ambient Temperature: -20 °C up to +80 °C [-4 °F up to +176 °F] , depending on version
  • Medium Temperature:
    • max. +120 °C [+248 °F] with a distance of at least 25 mm between flow meter and electronic housing
    • max. +150 °C [+302 °F] with a distance of at least 65 mm between flow meter and electronic housing
  • Output Signal: frequency output (various modes)
  • Ex Protection: II 2G Ex ia IIC T4-T6


Evaluation Electronics