Instrumentation
Fig. 2. The HygroGen enables users and calibration engineers to accurately and rapidly calibrate any type of humidity instrument.
Internet in real time. With the OMEGA iTHX-SD, there is no need to invest time and money learning a proprietary software program to log or chart the data. E+E Elektronik’s latest focus is on its EE33 series that is
designed for fast and reliable measurement of relative humidity, dew point temperature and absolute humidity under the most demanding process conditions. Neither condensation nor heavy chemical pollutions will affect prompt and reliable measurements. Process pressures as high as 100 bar (1450 psi) and continuous high humidity are also no problem for the EE33 series.
Testo’s new 6781 transmitter is capable of robust and
durable performance and is extremely resistant to condensation formation and offers an accuracy of ±3.0°Ctd at a dewpoint of -90°Ctpd. With these extremely low, measurable dewpoints, the Testo 6781 fulfils the two highest ISO quality classes regarding the requirements of, for example, modern semi-conductor production (class 1: -70°Ctd) or granulate drying processes (class 2: -40 °Ctd). As a comparison: the absolute humidity corresponds in class 1 = 0.003 and in class 2 = 0.12 g of water vapour per m3
. n
The proven advantages of non-contact temperature measurement
T
he infrared or non-contact thermometer clearly offers a distinct advantage over contact measurement due to its ability to determine accurately the target object’s temperature without any physical contact.
Many industrial applications benefit from this technology due to their non-contact nature. Infrared thermometers give the ability to monitor
temperature in situations where the object is inaccessible or moving, where the object may be contaminated or damaged by a contact sensor, where contact is not possible due to extremely high temperatures, or where the object is electrically active.
Since infrared thermometers can determine the temperature of a target object without physical contact, the measurement system
Fig. 1. Using traditional dip thermocouple standing near to take a measurement (temperature displayed on the wall), other person using a portable infrared non-contact device, standing further away and temperature displayed in the viewfinder.
does not contaminate, damage, or interfere with the process being monitored and has many advantages over contact measurement devices. An Infrared Thermometer can be mounted remotely from the hot target, enabling it to operate for long periods with minimal maintenance. Another significant advantage is the very fast response time provided by infrared thermometers, typically a temperature measurement can be made within a few thousandths of a second.
These types of thermometers are installed in a large range of process applications, including metals, minerals, paper and plastics. n
Enter 41 or ✔ at
www.engineerlive.com/epe
Land Instruments International is based in Dronfield, Derbyshire, UK.
www.landinst.com
www.engineerlive.com 41
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