The measurement of humidity in many high-temperature baking and drying processes requires special instruments characterised not only by stability, reliability and accuracy, but also by ease of use and flexibility of configuration. The Vaisala DRYCAP Dewpoint Transmitter DMT346 – supplied in South Africa by WIKA Instruments – meets these requirements. When configured to customer specifications, it can be used safely in temperatures up to 350°C.
Applications such as bread baking or cereal manufacturing, for example, must have a carefully controlled humidity level in the dryers and ovens in order to keep quality and yield high. To maintain humidity within acceptable limits, the moisture content of the process air must first be measured. A combination of high temperature, up to 350°C, and high humidity poses special challenges for measurement equipment. Very few devices can survive these conditions.
Moisture control ensures high-quality crackers
One example of a food production process where the right moisture level in the ambient air is essential, is in cracker production. The crackers are dried in three different phases in which the temperature varies from 150 to 300°C and the humidity goes from high to low.
If the ambient air has too much moisture in it, the crackers retain a high level of free moisture and will not crackle, as they should.
The high water content also means the crackers spoil more easily, and the production yield stays low. On the other hand, if the air is too dry, the surface of the crackers can dry too quickly and trap the free moisture within – or the product can become too dry and brittle. Drying the product too much also wastes heating power. In both cases the colour and flavour of the crackers suffer and the product yield is poor. Similar effects take place in bread and biscuit baking and in cereal and snack manufacture. Even in processes like roasting, the ambient moisture level changes the end product.
The DMT346 keeps its cool at 350°C
The Vaisala DRYCAP Dewpoint Transmitter DMT346 is specially designed for applications where both high temperatures and high humidity occur. The sensor can be placed directly in high temperatures without sacrificing measurement accuracy or stability.
The DMT346 has a unique auto calibration function which performs calibration and adjustment by itself while the measured process is running. All corrections, if any, are also run automatically, which allows operations to run without disruption.
Is the HVAC market in SA missing the big picture? Iritron
Temperature Measurement
The South African HVAC market is currently grappling with a pervasive mindset that prioritises lowest cost over value for money and technical excellence. However, this approach overlooks the significant benefits that come with investing in high-quality HVAC solutions.
Read more...Temperature monitoring in dairies ifm - South Africa
Temperature Measurement
Milk is a natural product whose processing requires precise temperature settings. The Berchtesgadener Land dairy uses innovative temperature sensors from ifm in key process areas.
Read more...Three ways to conduct thermal inspections Comtest
Temperature Measurement
There’s no universal solution for all infrared inspections with a Fluke thermal camera, also known as a thermal imager. You need to match your method to the type of equipment you’re inspecting and the level of detail you require.
Read more...New temperature relative humidity and barometric pressure transmitter Senseca
Temperature Measurement
ENVIROsense, a new environmental temperature, relative humidity, relative humidity and, optionally, barometric pressure transmitter has been launched by Senseca, a leader in the design and manufacture of monitoring and measurement instrumentation.
Read more...The role of alarm annunciators in temperature monitoring Omniflex Remote Monitoring Specialists
Temperature Measurement
Director at alarm annunciator specialist, Omniflex explores the importance of alarm annunciators in temperature monitoring applications, drawing on examples from different industrial settings.
Read more...Industrial water heating solutions
Temperature Measurement
Electrolux (Kwikot) Industrial’s massive water heating tanks are making a name for themselves beyond local borders.
Read more...Optimising steam management for boiler efficiency Endress+Hauser South Africa
Temperature Measurement
Endress+Hauser understands the daily challenges and demands placed on energy and utility managers across the spectrum of steam generation, distribution and consumption activities. Its global team is committed to working with its partners to overcome these complexities, and particularly those that aim for a safe, economic and sustainable sitsce of steam energy production and delivery.
printer friendly version