Manufacture: Process Sensors Corporation

Advanced Near Infrared (NIR) In-Process Measurement of Moisture, Oil, Coatings and Thickness


A Reliable, Rugged and Accurate Transmitter

The MCT460 Transmitter is available in Stand Alone Configuration or System Configuration.

The MCT460 Transmitter Stand-Alone design makes multiple measurements and creates analog, digital and bus outputs directly from the Transmitter as it operates on the processing line.

The MCT460 System design uses a proprietary cable to communicate to an Operator Interface, located away from the processing line. All analog, digital and bus outputs are available at the Operator Interface.

The Near Infrared (NIR) Operating Principle:


Light from the lamp is directed through the rotating, narrow band-pass NIR filters. The filters separate the light into NIR wavelengths, selected specifically by PSC for the measurement and application being performed. The NIR light is then directed onto the product being measured, normally on a conveyor belt or moving web.

Subsequently, the light reflected off of the product is captured by a mirror and focused onto a Lead sulfide detector. The detector’s microvolt output is then taken by the on-board “smart” circuit board and converted into percent moisture or other engineering units.

Technical Details:

New micro controller, high performance, dual core architecture. One core dedicated to NIR signal acquisition, the other programmed to manage computations and communications options

Samples entire NIR signal train for increased measurement accuracy

Embedded bootloader allows sensor firmware to be upgraded through USB or serial interface

Filter wheel speed adjustment through software

Temperature controlled PbS detector for enhanced stability

Built in cooling panel and Air Purge Assembly

Ergonomically sound IP67 cast aluminum enclosure

Operating Principle

Near Infrared (NIR) Operating Principle

Several molecular bonds absorb near infrared light at well defined wavelengths. The common bonds are O-H in water, C-H in organics & oils and N-H in proteins. The absorbance level at these specific wavelengths is proportional to the quantity of that constituent in the material.

Narrow band pass filters within the Transmitter create a sequence of light pulses. At least one of these pulses is at the absorbance wavelength specific to the constituent to be measured. The other pulses are created at wavelengths not absorbed by the measured constituent. The pulses illuminate the product and the diffuse reflected light is collected and focused onto a single, temperature controlled detector.

The electrical signals generated by the detector are then processed to provide a value that is proportional to the concentration of the measured constituent. The value is then displayed in % or other engineering units.

Measured NIR Constituents: 1, 2 or 3 simultaneously

Moisture Range: Min. 0.1%, Max. 95%

Coatings Range: Min. 0.1gr./m, Max. 200 gr./m

Fats & Oils: Min. 0.1%, Max. 50%

Product Distance: 8-18 inches (200-450mm)

Calibration Codes: 100

Response Time: 1 – 999 seconds.  Three modes available: damping, RTA and gated.

Power: 90-260VAC, 50/60 Hz, 40 watts

Outputs: 4-20mA, 0-10V (isolated), RS-232 & RS485

Digital Outputs:  Option for Profibus, DeviceNet, ProfiNet, Ethernet TCP/IP, Modbus

Weight/Enclosure: 19 lbs. (8.6kg) / IP67, Cast Aluminum  

Ambient Temperature: 0-50 °C (32-120˚F) with water or air cooling up to 80°C (160°F)

Window Purge: Air Purge Diffuser


  • Moisture: +/- 0.1%
  • Coatings: +/- 0.1 gr./m
  • Fats/Oils: +/- 0.2%
  • Repeatability: +/- 0.2%

CE Compliance: EMC Directives EN50081-1 & EN50082-2, EN61010-1

Application :


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