classic | mobile
 

Search...

SA Instrumentation & Control Buyers' Guide

 

Accurate water activity measurement in food
February 2017, Sensors & Transducers


Free water in food products can be jointly responsible for the growth of undesirable organisms, such as bacteria or fungi, as well as chemical or biochemical reactions that react to form polymeric products, usually brown in colour and known as Maillard reactions. For this reason, it makes sense to monitor and control the water activity (aw) levels, which is defined as the current volume and availability of free water. The rate and extent of browning reactions generally increases with increasing aw until a maximum level is reached (usually 0,6-0,8 aw), followed by a decrease in browning rate with further increases above 0,85 aw.

After years of intensive research, Swiss company Novasina, specialists in water activity measurement, released a revolutionary modular, multi-channel water activity device that fulfils requirements of several organisations such as FDA and international regulations such as HACCP concerning traceability and safety of high level food.

With the LabMaster aw system, available locally through Labotec, measurements can be made with unprecedented accuracy. All the newest technologies of sensors, design, electronics and software can be integrated. Intelligent high-precision measuring cells, modular expandability, a temperature controlled chamber, easy operation and a very large working and measurement range are features to make usage easy. Many of the available functions are also innovations in this field and therefore have set new standards.

The concept of water activity is not considered a routine measurement in most food laboratories, however, safe free water levels in products does merit closer attention especially when the control of water activity levels becomes an important way to maintain the chemical stability of foods.

For more information contact Deborah Shaw, Labotec, +27 (0)11 315 5434, sales@labotec.co.za, www.labotec.co.za


Credit(s)
Supplied By: Labotec
Tel: +27 11 315 5434
Fax: +27 11 315 5882
Email: sales@labotec.co.za
www: www.labotec.co.za
Share via email     Share via LinkedIn   Print this page

Further reading:

  • Humidity measurement in poultry farms
    August 2017, Instrotech, Sensors & Transducers
    Temperature and humidity measurement are required for each stage of the chicken lifecycle.
  • Being sensible with sensors in intralogistics
    August 2017, Countapulse Controls, Sensors & Transducers
    There has been much debate in the field of intralogistics around whether classic high bay storage devices or self-driven shuttle systems are the future. Gerry Bryant, managing director of Countapulse ...
  • Telco optical fork sensors for packaging applications
    August 2017, Gail Norton Instrumentation, Sensors & Transducers
    Telco’s OFS series consists of self-contained optical fork sensors that are housed in a durable, U-shaped aluminium housing which operates in thru-beam mode. The series is available with a wide variety ...
  • Foxboro pH sensors reduce costs and maintenance
    August 2017, Sensors & Transducers
    Traditionally, pH sensors require replacement and are sometimes seen as consumables due to the frequency of change-out in certain applications. Therefore, suppliers are constantly working on developments ...
  • Smooth speed regulation with high precision
    August 2017, Countapulse Controls, Sensors & Transducers
    The new Hengstler Acuro AX73 is a class-leading optical encoder that offers smooth speed regulation with high levels of precision. Its compact dimensions make it suitable for installation in areas where ...
  • Why use image-based barcode readers?
    August 2017, Westplex, Sensors & Transducers
    Image-based barcode readers are rapidly replacing laser scanners in a wide range of industries including food, beverage, consumer goods, pharmaceutical, and logistics, but when considering a transition ...
  • Time of flight technology as standard sensor
    August 2017, ifm Electronic RSA, Sensors & Transducers
    Ifm electronic’s O5D with time of flight technology (photonic mixer device) combines the following advantages: long range, reliable background suppression, visible laser light and high excess gain. In ...
  • Precise object detection under extreme conditions
    August 2017, ifm Electronic RSA, Sensors & Transducers
    Ultrasonic sensors transmit and receive sound waves in the ultrasonic range. The object to be detected reflects the sound waves and the distance information is determined via time of flight measurement. ...
  • Ultrasonic sensor with analog and switching output
    August 2017, RET Automation Controls, Sensors & Transducers
    Besides the ‘high-end’ line, Turck’s ‘standard’ line of RU ultrasonic sensors is now also available with an analog output. In addition, the new sensor also offers a special switching output with a switching ...
  • Sensor and RFID Tag in one
    August 2017, RET Automation Controls, Sensors & Transducers
    Turck’s HF-RFID/sensor tag records and stores measured values such as temperature and pressure and can be read without contact controls. The sensor tags record and store process values such as temperature ...
  • Colour mark sensor with RGB technology
    July 2017, RET Automation Controls, Sensors & Transducers
    Registration marks identify packaging material and are used for position control and to coordinate the separation and cutting of webs of packaging material. The webs are processed at high speeds and product ...
  • Compact ultrasonic sensor with IO-Link
    July 2017, RET Automation Controls, Sensors & Transducers
    Turck has added a variant with an IO-Link output to its basic Compact series of ultrasonic sensors. Users can use IO-Link for the process values or continue to use the switching output of the sensor. ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronic Buyers Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    classic | mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.