NIR Moisture Sensors

Online surface moisture measurement

Key Features

Non-contact, single sided online measurement
Liquid cooled head platform for better long-term reliability
More accurate online measurements with less calibration needs
Dust trap before lens to keep it free from steam and dust
More accurate online measurements using large optical components

Measuring Method

The Scienta NIR absorption-based sensor series 7230 is a double sided, 2-channel or 4-channel InGaAs detector-based Moisture weight sensor for online use. The sensor measures the infrared light absorbed by different wavelengths caused by the water on sheet. This signal is digitalized and linearized to correlate to real weights in engineering units. Moisture range is 1 – 35 %. Paper weight range is 5..350 g/m².

Benefits

To process applications such as paper moisture, corrugated board warp control & pulp drying water management, laminating, paper surface moisture etc.

No radioactive source is required
Non-contact measurement
Service free construction
Easy and convenient to install and operate
Full range of scanners available
Easy calibration and setup
More accurate online measurements
Faster on-spec quality and reduced start up waste

Faster on-spec quality and reduced start up waste
Reduction in rejects due to high performing measurements
Measurement before size press is possible using liquid cooling option
Machine speeds can be increased on drying limited pulp and paper machines
Spectrometer with 128 channels available

Technical Specifications

Sensor Type	7230-2	7235-2
Construction	Double sided	Single sided
MEAS Channels	2,4, 128	2
Moisture Range	5–350 gms, 1–35 %	1 – 70 %
Accuracy	0,1%	0,2%
Repeatability	0,01%	0,01%
Reccomended Measurement gap	13 mm	100 mm
Power	+24V, 1A	+24V, 1A
Installation	Scanning /Fixed	Scanning /Fixed

Sensor Type	7230-2	7235-2
Ambient light sensitivity	None	None
Interface Options	Profibus	Profibus
	Modbus	Modbus
	Ethernet	Ethernet
	USB	USB
Local PLC	Yes	Yes
Environmental Conditions	10-60 ℃ 10-95 % RH	10-60 ℃ 10-95 % RH
Liquid Cooling	Optional	Optional