HK1 - M


Concentration- and moisture measurement

  • sate of the art microwave engineering
  • modular setup of evaluation unit and sensors
  • no moving parts
  • no wear
  • vibrations do not have an influence on the result of measurement
  • maintenance-free
  • optional remote control from a PC or separate operating device
  • up to 16 different calibrations
  • temperature sensor PT100 is standard, optional NTC possible
Due to the robust and modular design the microwave measuring instrument HK 1-M is particularly suitable for the measurements of concentration and water content in the food- and chemical industry.

The microwave measurement devices generate an electromagnetic wave of low energy. This signal is coupled via an antenna into the product.

Depending on the dielectric properties of the product the signal propagates in the product. After the signal has passed the product a second antenna receives the signal (Transmission).

Amplitude and phase shift of the received signal are an expression for the water content or dry matter of the product.

The microwave measurement is very stable and it has a quick response to product changes.
Transmissions signal passes through
an in-homogenous product

Depending on the operational area following antennas are available: We advise you gladly which antennas for which application or measuring kind the best results supply.

Technical data:

Measuring procedure Microwave engineering ISM-Band
   Size LxWxH
pressure cast aluminium housing
230 x 200 x 110mm
IP65 / NEMA 4
RAL 5024
   Power supply
   2 Analog outputs
   1 Analog input
   Temperature sensor
   PC interfaces
   1 Relays contact
   4 Digital inputs


100-240V AC, optional 24V DC
0/4 - 20 mA
0/4 - 20 mA
PT 100, optional NTC possible
RS 232 or optional RS 485
max. 5A/250V
ext. select of 16 products / start / stop
such as for pressure compensation
User interface

6 integrated soft keys in keypad
2 x 24 characters illuminated
Sonsors / Antennas Pin antennas
Horn antennas
Spiral antennas
3A-spiral antennas
Short 3A pin antennas
Mini-spiral antennas
Ambient conditions
   Environment temperature
   Product temperature

-20°C to +85°C
 >0°C to +130°C (on request +140°C)
Flyer HK1

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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