Harrer & Kassen  HK8

NIR-H2O-Meter

Range of Application
Infrared measurement in the range of NIR for the detection of only H2O (moisture, water content, total/dry solids) in products on conveyor belts. The meter is sufficient for products with a smooth and planar surface as well as for abrasive bulk material.


Messprinzip Principle
This infrared measurement technique irradiates the surface of the product with illumination infrared LEDs.
The measured data, generated by reflection, are evaluated by the HK7 system.
The evaluation realize the detection of every H2O molecule, with an absorption line in the spectrum of measurement

Functionality
Continuous NIR reflection measurement with illumination infrared LEDs. The NIR-H2O-Meter is a compact unit, evaluation and sensor system are mounted in the same housing.

The evaluation takes place in the peak areas as follows: 970, 1200, 1800 and 2200 nm. The distance between sensor system and product is appr. 200mm.

The measured value of the H2O content is available as digital and analogue value.

 Übersicht


Configuration
Housing:
   Size HxWxD
   Enclosure
   Color		 aluminum pressure casing housing
230 x 280 x 110 mm
IP65 / NEMA 4
RAL 5024

Connections
   Power supply
   4 analog outputs
   2 PC interfaces
   Sensor


100-240V AC
0/4 - 20 mA
RS 232 oder RS 485
Illumination with infrared-LEDs
User interface
   Operating
   Monitoring
6 soft keys in integrated keypad
2 x 24 characters in illuminated display
Ambient conditions
   Environment temperature
   Product temperature
-20°C - +85°C
 >0°C - +130°C



Measurement Design
The sensor system is located 200mm over the to be detected product surface. The product surface can be smooth and planar, but also bulk material. The products (i.e. cement, plastic granulate) are moving on a conveyor belt under the sensor system. The environment has to be dust-free.



Applications
The number of feasible applications from today's view is limited to bulk material in the primary and construction industry.
Conceivable applications:

  • Plastics industry
  • Primary industry
  • Construction industry
  • Cement
  • Gravel
  • Coal
  • Granitic sand
  • Clay
  • Plastic granulate


Advantages
In contrast to conventional IR- or NIR-systems of the competition, the HK8 is not equipped with colour filters or halogen bulbs. The used LED illumination cares for an improved stability with a lifetime of 10 years.



Market Launch
The check out of the NIR-H2O-Meter takes place in several pilot schemes. Inclusion in catalogue/price list and start of acquisition: May 2010.