Calorimetric flow measurement measures the energy required to keep a constant temperature difference between an unheated sensor and a heated sensor, both in good thermal contact with the flow media and well insulated from each other. The energy required to maintain this temperature difference is proportional to the flow.
The EFK2 is a calorimetric flow switch which has no moving parts in the flow stream. Switch output is either a relay or push/pull transistor. Setpoint adjustment is by potentiometer with a
red/green LED indicating switch status.
LABO-F012 sensors offer an economical means of measuring the flow rate of non-viscous fluids. The flow transmitter is packaged in a compact 12mm diameter housing with M12x1 round plug signal outlet. The 16-bit processor carries out temperature compensation and linearisation of the calorimetric signal (measurement of the heat removal at the sensor tip by the flowing medium).
The LABO-F012 electronics can be supplied with the following outputs:
The Flex-F flow sensor monitors liquid media. In a compact design, it combines the installation sensing element and evaluation electronics that, depending on the version, control a limit value output with either a PNP or NPN transistor output, an analogue output (4..20 mA or 0..10 V) or both. The limit switch can alternatively be replaced by a frequency output. The evaluation electronics record two processing parameters: the flow speed of the medium and its temperature. Both parameters can be assigned to the analogue output or the switching output.
Features:
