HK13 Microwave Resonator

HK13 Flow cell HK13 Conveyor Belt

Water Content Measurement

  • microwave technology
  • compact design
  • wear-free
  • maintenance-free
  • control via a separate remote control
  • the HK13 is suitable for belt, pipe, chute and hopper measurement

The microwave resonance measurement uses the electromagnetic energy stored inside a resonator to determine the water content of a product.

Via a non conducting window, the resonator field is coupled into the material located in front of the resonator. This so called leakage field is not radiated.

Depending on the dielectric properties of the product, the shift of resonance frequency and bandwidth of the resonator is used for measurement.

The ratio of bandwidth and frequency shift is density independent. The measurement is highly suitable for bulk material.
Resonance Measurement
Due to the sensor’s distance dependency it is recommended to place the sensor as close as possible to the product, the measured values are available as %H2O.
  • Pet food
  • Animal food
  • Pellets
  • Wood fibre
  • Wood chips
  • Wood plates
    (MDF, Chipboard, etc.)  
  • Breadcrumbs  
  • Muesli
  • Fertilizer
  • Corn rice
  • Cereals
  • etc.

Technical data:

Measuring procedure Microwave engineering ISM-Band
   Size LxWxH
pressure cast aluminum housing
200 x 140 x 90mm
IP65 / NEMA 4
RAL 5024
   Power supply
   2 Analog outputs
   Temperature sensor
   1 PC interface

100-240V AC, optional 24V DC
0/4 - 20 mA
RS 232 or RS 485
User interface

6 integrated soft keys in keypad
2 x 24 characters illuminated
Sensor Aluminum/ Stainless Steel
Ambient conditions
   Environment temperature
   Product temperature

-20°C to +85°C
 >0°C to +120°C (on request +200°C)
Flyer HK13

Harrer & Kassen GmbH
Am Heschen 4-6
D-75328 Langenbrand
Tel:     +49 (0)7084/9248-0
Fax:   +49 (0)7084/9248-29
eMail: info(at)

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