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Home > News > Auxiliary

Reliable & cost-effective bulk solids moisture testing with DewTector

Source：Adsale Plastics Network Date ：2026-04-30 Editor ：Victor
Copyright： This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

With the launch of the DewTector, Coperion introduces an innovative moisture measuring device designed to provide reliable, automated online measurements of surface moisture content in bulk materials, particularly plastic pellets. 


The patent-pending device offers an economical, simple and reliable method to help plastic manufacturers and recyclers monitor moisture levels more efficiently. It addresses a critical challenge faced by processors in maintaining both product quality and maintaining compliance with industry standards.

 

The DewTector uses a straightforward approach ─ it introduces a partial flow of bulk solids into a pressure-tight product chamber. The system determines the moisture content by analyzing the moisture released into the airflow. As the air absorbs moisture, it is analyzed by a hygrometer that measures only water content. This targeted detection ensures reliable results unaffected by other substances or changes in material composition. 


The system neither requires extensive calibration, nor the use of chemicals for different materials or recipes, making it easy to operate and maintain. The system achieves an accuracy of +5% to −15% across moisture levels ranging from several thousand ppm to a few hundred ppm, with up to ten measurements per hour. 


Coperion_DewTecotr_DTR-A_2.jpg

DewTector in a typical bypass line configuration. Its compact design, with a height of only 184 mm (flange to flange), simplifies process integration. (Source: Coperion)


Challenges of Moisture Measurement in Plastics


Plastic manufacturers often face the challenge of moisture entering their final products, which can originate from various sources such as insufficient drying, defective water separators, leaking wash nozzles, or environmental factors like rain and condensation. 


If moisture levels go undetected, it can lead to costly product complaints and reputational damages. Additionally, processors must adhere to strict moisture content limits to ensure high-quality output, and the recycling sector requires dry input materials for effective processing.


Traditionally, moisture measurement has been labor-intensive and prone to inaccuracies, often relying on sporadic manual assessments of relative humidity in bags and containers. Existing automated methods, such as capacitive and microwave resonance techniques are typically complex, expensive, and require extensive calibration for different formulations, making them impractical for many users.


By simplifying moisture measurement and reducing the labor and time spent on manual sampling and analysis, the DewTector enhances operational efficiency while providing accurate, real-time data critical for process control.


Coperion_DewTector_1.jpg

A cross-sectional view of the DewTector's product chamber, illustrating the air flow. The direct measurement approach using a hygrometer eliminates the need for complex calibrations for each formulation. (Source: Coperion)

 Like 丨  {{details_info.likes_count}}
Measuring and testing equipment
Recycling
Coperion
 SACMI (SHANGHAI) MACHINERY EQUIPMENT CO., LTD.      
 DONGGUAN DEHUA PRECISION MOLD CO., LTD      
 ZHANGJIAGANG XINRONG MACHINERY CO.,LTD      
 JUHESHUN ADVANCED MATERIALS CO., LTD.      
 HEFEI TAIHE INTELLIGENT TECHNOLOGY GROUP CO.,LTD.      
 BEIJING ENERGY ENGINEERING TECHNOLOGIES CO.,LTD.      
 WINDORA MATERIALS LLC      
 GREENWICH (CHINA) TECHNOLOGY DEVELOPMENT LIMITED      
 GREENCORE RESOURCES LIMITED      
 LINKER NEW MATERIALS CO., LTD      
 Coperion GmbH      
 SHANGHAI HAWKWAY PROCESS SOLUTIONS CO., LTD      
 GUANGXI HENGYI NEW MATERIALS CO., LTD.      
 TAIZHOU MIXIN MACHINERY CO., LTD.      
 ZHEJIANG ROTOUN PLASTIC TECHNOLOGY CORP.      
 GUANGDONG GUOHENG YOUHE ADVANCED MATERIALS CO., LTD.      
 KADIDE      
 GUANGXI WUZHOU GUOLONG RECYCLABE RESOURCES DEVELOPMENT CO., LTD.      
 SUZHOU QIANTONG INSTRUMENT EQUIPMENT CO.,LTD      
 SUZHOU BECHTON PLASTIC MACHINERY CO., LTD      
 YUYAO KAWAGUCHI Manufacturing Co., Ltd.      
 LINYI HUASU ELECTRONIC TECHNOLOGY CO., LTD.      
 GUANGDONG ENMEI CHEMICAL TECHNOLOGY CO., LTD      
 ANHUI ZHONGXIN HONGWEI TECHNOLOGY CO.,LTD      
 FUJIAN NAN'AN STAR RUBBER&PLASTIC MACHINERY CO., LTD.      
 ZHANGJIAGANG GREENLANDPLAST MACHINERY CO.,LTD      
 FUJIAN YANGZHU NEW MATERIAL SCIENCE & TECHNOLOGY CO., LTD      
 HUBEI XINJIANSHI MACHINERY TECHNOLOGY CO.,LTD      
 HEBEI GELIA PLASTIC MACHINERY SALES COMPANY      
 FOSHAN SHUNDE MINGSANFENG MOULD CO., LTD.      

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Source：Adsale Plastics Network Date ：2026-04-30 Editor ：Victor
Copyright： This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

With the launch of the DewTector, Coperion introduces an innovative moisture measuring device designed to provide reliable, automated online measurements of surface moisture content in bulk materials, particularly plastic pellets. 


The patent-pending device offers an economical, simple and reliable method to help plastic manufacturers and recyclers monitor moisture levels more efficiently. It addresses a critical challenge faced by processors in maintaining both product quality and maintaining compliance with industry standards.

 

The DewTector uses a straightforward approach ─ it introduces a partial flow of bulk solids into a pressure-tight product chamber. The system determines the moisture content by analyzing the moisture released into the airflow. As the air absorbs moisture, it is analyzed by a hygrometer that measures only water content. This targeted detection ensures reliable results unaffected by other substances or changes in material composition. 


The system neither requires extensive calibration, nor the use of chemicals for different materials or recipes, making it easy to operate and maintain. The system achieves an accuracy of +5% to −15% across moisture levels ranging from several thousand ppm to a few hundred ppm, with up to ten measurements per hour. 


Coperion_DewTecotr_DTR-A_2.jpg

DewTector in a typical bypass line configuration. Its compact design, with a height of only 184 mm (flange to flange), simplifies process integration. (Source: Coperion)


Challenges of Moisture Measurement in Plastics


Plastic manufacturers often face the challenge of moisture entering their final products, which can originate from various sources such as insufficient drying, defective water separators, leaking wash nozzles, or environmental factors like rain and condensation. 


If moisture levels go undetected, it can lead to costly product complaints and reputational damages. Additionally, processors must adhere to strict moisture content limits to ensure high-quality output, and the recycling sector requires dry input materials for effective processing.


Traditionally, moisture measurement has been labor-intensive and prone to inaccuracies, often relying on sporadic manual assessments of relative humidity in bags and containers. Existing automated methods, such as capacitive and microwave resonance techniques are typically complex, expensive, and require extensive calibration for different formulations, making them impractical for many users.


By simplifying moisture measurement and reducing the labor and time spent on manual sampling and analysis, the DewTector enhances operational efficiency while providing accurate, real-time data critical for process control.


Coperion_DewTector_1.jpg

A cross-sectional view of the DewTector's product chamber, illustrating the air flow. The direct measurement approach using a hygrometer eliminates the need for complex calibrations for each formulation. (Source: Coperion)

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