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Moisture in Crumb Rubber  

Optimizing moisture levels not only increases yield, but also the efficiency of the drying operation.

Synthetic Crumb Manufacturing Process – Emulsion Crumb Process
The first stage of this process involves the polymerization of butadiene and styrene polymers to form a milky white emulsion termed Latex. The reaction is stopped before completion, owing to a fall off in the reaction rate. Quality of product and monomers are recovered from the latex stream prior to it being stored.

In the second stage, latex is pumped to coagulation vessels where brine and diluted sulfuric acid are added. This causes the emulsions to break, releasing the styrene-butadiene copolymer. The crumb and brine acid slurry is separated by screens, and the crumb is pressed before being dried on a belt dryer. The dried product is baled and weighed.

Measurement Location
The gauge is usually located 8” above and perpendicular to the moving conveyor post dryer. An air or water cooling option may be required in order to prevent the gauge electronics from overheating. An air purge assembly is essential in order to prevent both dust collecting and steam condensing on the gauge viewing window.

Measurement Performance
Measurement Location Target % Typical Accuracy%
Moisture Exit of Pelletizer 9-15% 0.25%
Application Photos
MCT460   MCT460-WP   MCT460-T   MCT466HD   MCT466SF   MCT466QC   GUARDIAN  
Moisture Transmitter
Tobacco Moisture Transmitter
Wood Products Moisture Transmitter
MCT466 QuikCheck
Rugged NIR Tester
Scanning Frame System
Process Sensors Corp.
113 Cedar Street
Milford, MA 01757 USA
Tel: (508) 473-9901
Fax: (508) 473-0715
Process Sensors Europe
Unit 4, Adelaide House
Corbygate Business Park
Corby, Northants NN17 5JG
United Kingdom
Tel: 01536-408066
Fax: 01536-407813
Process Sensors Polska
Ul. Modlinska 310/312 lokal 216
03-152 Warszawa
Tel: (48) 22 6739526
Fax: (48) 22 6739527
Gsm: (48) 509 202759
Process Sensors Asia
PT 2328 Pinggiran Golf
Kemumin, Pengkalan Chepa
Kota Bharu, Kelantan 16100
Tel: 011 60 9773-1352
Fax: 011 60 9773-1352
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  Process Sensors Moisture Transmitters

MCT 460: Used in a wide variety of industrial processes, the MCT 460 Multi-Constituent NIR Transmitter, a True Stand-Alone Transmitter, provides off-line accuracy under on-line operating conditions. Read more about the MCT 460 moisture sensors...

MCT 460-T: The MCT 460-T measures moisture... the most critical variable in tobacco processing... providing the world's most accurate, reliable and stable moisture measurement for the tobacco industry. Read more about the MCT 460-T moisture measurement tool...

MCT 460-WP: The MCT 460-WP uses a well proven algorithm which works on a wide range of wood varieties and forms. You choose the mode of operation, stand-alone or networked. Read more about the MCT 460-WP moisture measurement tool...

MCT 466HD: The MCT466HD features a heavy duty stainless steel enclosure, is resistant to high temperatures, is sealed for wash down environments, and provides reliable, continuous moisture measurement. Read more about the MCT466HD moisture measurement tool...

MCT 466-SF: The MCT 466-SF features a food grade optical window, a robust stainless steel enclosure, and reliably operates in high temperature locations, measuring moisture, oil & product temperatures. Read more about the MCT 466-SF moisture measurement tool...

MCT 466 QuikCheck: Used for quality control in a wide variety of industrial processes, the MCT 466 QuikCheck bench top NIR Tester provides fast accurate results every time. Read more about the MCT 466 QuikCheck moisture analyzer...

GUARDIAN: The Guardian Scanning Frame System is comprised of three components: MCT-460 NIR Transmitter, the automated Scanning Frame and a PC with Automated Guardian Profile Software. Read more about the GUARDIAN Scanning Frame System...