FEATURE TEST & MEASUREMENT
Selecting the right temperature probe
There are many types of temperature probes that have different applications across a whole host of industries. Here, Variohm Eurosensor provides tips for selecting the right probe
A
temperature probe is a type of temperature sensor. There are
many different types of temperature probe and these are used for different applications across a whole host of industries. Some temperature probes can
measure temperature by being placed onto the surface. Others will need to be inserted or immersed in liquid to be able to measure the temperature. Often, temperature probes will measure the change in voltage and convert this into a format which can be monitored by the user. Temperature probes can be either standard configurations or bespoke
and made to order by the customer. The standard types tend to be used for more common applications, for example, within the medical industry, whereas bespoke temperature probes are often used for very specific applications, such as in motorsport or engineering.
DIFFERENT TYPES OF TEMPERATURE PROBES Temperature probes come in different formats - each type has pros and cons. Negative temperature coefficient
(NTC) temperature probes utilise thermistors. These are often low cost with a smaller temperature range
but tend to offer a quick response and are highly sensitive. Resistance temperature detector
(RTD) temperature probes offer high reliability and long life. This does make them a little more costly but they also offer a wide temperature range. Thermocouple temperature probes are cheaper than RTDs and also offer a wide temperature range, however, they are not as stable over time and some will need replacing more often.
INDUSTRIES AND APPLICATIONS Temperature probes can be used in almost any industry. Some of the more popular industries Variohm
EuroSensor see demand for are medical, motorsport, food and communication. Some applications for temperature probes are common in everyday life, others are very industry specific. Here are just a few of the applications which Variohm EuroSensor have come into contact with: industrial equipment; patient monitoring; transit; computers; home appliances; HVAC; power and utilities; calibration and instrumentation; laboratory; energy; and drilling.
Variohm EuroSensor
www.variohm.com
SPECIAL STRAIN GAUGES 2D LASER MEASUREMENT
HBM Test and Measurement (HBM) has expanded its range of strain gauges with the KFU series, which can be used at extremely high temperatures up to +350°C. The KFU strain gauges are shipped with 1m long cables and are protected
against high temperatures. They are available in grid lengths of 2mm and 5mm as well as in different versions, such as linear, T (with two measuring grids) or R (with three measuring grids) rosettes, depending on the application’s requirements. Additionally, the KFU strain gauges are available with temperature responses matched to steel, austenitic steel, and aluminum. Typical applications include strain measurements in autoclaves or
environments with steam. The strain gauges can be used at high temperatures for specified durations; at 350°C they can be used for 72 hours or at 300°C for 360 hours. The series KFU strain gauges are the first products manufactured by
HBM in collaboration with the Japanese manufacturer Kyowa Electronic Instruments, and HBM has added this series to its standard range of products. This cooperation of two technology leaders enabled HBM to complement its range of products with additional sensors, such as those for very high temperatures, and offer these to clients in future.
HBM 30 JUNE 2018 | INSTRUMENTATION
www.hbm.com
Riftek has released a new multifunctional software application that utilises its RF625 series 2D laser scanners for automated seam tracking and measurement with welding robots. Available with full support in the UK & Ireland
from Ixthus Instrumentation, the Riftek Lamia software is intended for recognising, tracking and measuring geometric parameters of objects such as weld seams in accordance with a selected maths algorithm which is derived from a template. The PC-based software interfaces to the client robot controller to transmit results and includes data visualisation and the setting and control of the RF625 laser scanner’s parameters. The software was developed with the support of a main strategic partner
for Kawasaki and Fanuc robots and various industrial robot communication protocols are included for fast and convenient set-up. Two sets of ready- to-use maths algorithms for “Welding” and “Measurement” are included that cover recognition, tracking and measurement of geometric parameters of objects in real-time. Automatic recognition of the objects through the RF625 laser scanner in accordance with the selected template is automatic with no need to measure manually. Riftek’s Lamia software includes calibration of the laser scanner in-situ with the selected robot arm. Riftek’s RF625 series 2D laser scanners include 22 models for high
precision non-contact measurements of profile or dimensions for working lengths from 5mm to 1,400mm with highly precise linearity and high sampling rates. A choice of red, blue and IR diode wavelengths suit a wide range of materials/environments and furthermore the scanners may be used separately for product recognition or general control.
Ixthus Instrumentation
www.ixthus.co.uk
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