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Calorimetric Flow Measurement

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 isulated from each other. The energy required to maintain this temperature difference is proportional to the flow.

Calorimetric Flow Switch
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 picture honsberg logo
Calorimetric Flow Transmitter
LABO-F012 sensors offer an economic means of measuring the flow rate of non-viscous fluids. The flow
transmitter s packaged in a compact 12 mm diameter housing and 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:
  • Analog 0/4...20 mA signal (LABO-F012-I)
  • Analog 0/2..10 V signal (LABO-F012-U)
  • Frequency signal (LABO-F012-F)
  • Pulse output, pulse / x litres (LABO-F012-C)
HK35-FIN image honsberg logo
Flow measurement of very small quantities
Watch the video of this instrument in action
The OMNI-FIN calorimetric sensor measures small fluid flows, and has been designed specially for use in the
food manufacturing industry
The integrated transducer has a backlit graphics LCD display which is very easy to read both in the dark and in
bright sunlight. The graphics display clearly presents th measured values and parameters in an easily
readable form. The measured values are displayed to 4 places, together with user selectable units.
The electronics have an analog output (4..20 mA or 0..10 V) and two switching outputs, which can be used as
limit switches for monitoring minimal or maximal, or as two-point controllers. The switching outputs are
designed as pushpull drivers, and can therefore be used both as PNP and NPN outputs. Exceeding limit values
are signalled by a red LED which is easily visible over a long distance, and by a text on the display.
The stainless steel case has a hardened non-scratch mineral glass pane.
Configuration is by a programming ringfitted with a magnet,
so there is no need to open the operating controls housing, thereby ensuring its leakproof
integrity. By turning the ring to right or left, it is simple to modify the parameters such as switching point,
hysteresis etc.
To protect from unintended programming, it can be removed, turned through 180 °
and replaced, or completely removed, thus acting as a key.
  • For foodstuffs use
  • Analog output 0/4..20 mA or 0/2..10 V
  • Two programmable switches (push-pull)
  • Graphical LCD display, backlit (transreflective), can be read in sunlight and in the dark
  • Programmable parameters via rotatable, removable ring (programming protection)
  • Full metal housing with non-scratch, chemically resistant glass
  • Physical unit in the display (selectable)
  • Rotatable electronic head for best reading position
  • Connection to USB interface for setting parameters
Honsberg FLEX-F

honsberg logo
Calorimetric Flow Transmitter & Switch

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 a PNP or NPN transistor output or 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.
  • Compact robust flow switch & transmitter with 4-20mA or 0-10VDC output
  • Can also be used as temperature transmitter or switch
  • No moving parts in contact with the monitored media
  • Only one medium contact material
  • Simple to use
  • Very low pressure loss
  • Various sensor lengths & models
  • Short response times for a calorimetric sensor
  • Cable outlet infinitely rotatable
  • Narrow installation width, can be used on small pipes