Pyrometer for harsh temperature applications
May 2017
Temperature Measurement
Measuring the temperature of reflective metals is a challenge as reflective surfaces, hot furnaces and high ambient temperatures can make it difficult to achieve results with non-contact sensors. Now available from ASSTech is the Calex Fibre-Mini, a fibre optic pyrometer with innovative features for accurate measurement, specific for these applications.
Problems when using a handheld IR thermometer to measure the surface of shiny metals include difficulty to achieve an accurate measurement as changing the angle can affect the reading, or the thermometer cannot display a believable temperature, especially when aiming it into a furnace.
General purpose, long wavelength temperature guns are not suitable to use on metals because they are more susceptible to errors than shortwave sensors if the emissivity setting is incorrect. A small error can cause a big error of measurement.
Add to this the problem that the area surrounding the furnace is a harsh place to mount an infrared sensor, with the ambient temperature commonly exceeding 100°C and this challenging application rules out most choices of sensor.
The solution is to use a shortwave pyrometer such as the Fibre-Mini with the following advantages:
• Fibre-optic sensing head withstands up to 200°C ambient temperature, making it ideal for mounting near furnaces.
• No electronics in the sensor head make it immune to electromagnetic interference in high-EMC applications such as induction heating.
• Reflected energy compensation allows for an accurate reading when measuring reflective objects inside furnaces. Simply enter the temperature of the furnace interior and the sensor will compensate for the reflection for a more accurate reading. This can also be adjusted automatically on Modbus models for maximum accuracy during heating and cooling cycles.
• Laser aiming light illuminates the measurement area, showing both the location and the size of the measuring spot.
• Large, full colour temperature display with data logging makes the Fibre-Mini a truly plug-and-play solution. A choice of 4-20 mA or RS-485 Modbus outputs is available for connection to the process instrumentation.
• Fully configurable via touchscreen with no need for any additional configuration hardware or software.
A choice of temperature ranges from 250°C to 2000°C is available, as is a choice of optics for measuring small or large areas at short or long distances. Feeding the sensing head through conduit and trunking is easy thanks to the slim, highly flexible fibre-optic cable which is available in lengths of 3,5 or 10 m. The short measurement wavelength allows the sensor to measure through many ordinary viewpoints made of glass or quartz as well as specialist IR-transmissive materials.
For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, +27 (0)11 708 9200, info@asstech.co.za, www.asstech.co.za
Further reading:
Temperature measurement solution for foundry
Temperature Measurement
AMETEK Land, a world-leading manufacturer of infrared pyrometers, scanners and thermal imagers, is helping an Indian foundry to support metal quality and reduce ongoing costs.
Read more...
Supporting sustainable steelmaking
Temperature Measurement
AMETEK Land is helping the steel industry meet global decarbonisation challenges with a range of solutions.
Read more...
High-precision data loggers for wire and thermocouple probes
Senseca
Temperature Measurement
Senseca, formerly the GHM Group, has launched new handheld meter/data loggers for Pt100 four-wire probes and thermocouple probes. These are redesigned with enhanced features.
Read more...
How wet steam undermines 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.
Read more...
Dramatically reducing greenhouse emissions
Temperature Measurement
Online teaser: There is considerable potential for reducing CO
2 emissions in the mill process by optimising the heat source for drying. The most promising approach to achieving a carbon neutral process in a hot gas generator is the combustion of green hydrogen.
Read more...
Infrared camera for condition monitoring and early fire detection
Instrotech
Temperature Measurement
The Optris PI 640i thermal imager is the smallest measuring VGA infrared camera, with a body-sized volume of 45 x 56 x 90 mm, and weighing only 269 to 340 g, depending on the lens. It counts among the most compact thermal imaging cameras on the market.
Read more...
Paint curing applications in the automotive industry
R&C Instrumentation
Temperature Measurement
For successful paint cure, irrespective of the paint chemistry being used, there is a critical need to measure and control the temperature of the car body as it travels through the oven. Today, paint ovens are controlled in a sophisticated fashion via thermocouples located in each zone to give constant feedback on the ambient temperature.
Read more...
Universal temperature transmitter with drift detection
WIKA Instruments
Temperature Measurement
The new model T38 digital temperature transmitter from WIKA enables extremely flexible and stable temperature measurement. The instrument offers a maximum of sensor connection combinations, and a new type of drift detection.
Read more...
Temperature monitoring in the metal casting process
Instrotech
Temperature Measurement
During metal casting, the liquid material is poured into a mould, and after solidification becomes a solid body. Both too-high and too-low casting temperatures can lead to quality defects. The compact Optris PI 05M infrared thermal imaging camera from Instrotech can monitor the casting process.
Read more...
Pyrometer range with enhanced features
Temperature Measurement
AMETEK Land has relaunched its market-leading SPOT pyrometer range with enhanced features and benefits for a wide range of industrial applications. The new SPOT+ family offers a wide range of temperature measurement from 50 to 3500°C, and a choice of different wavelengths for applications including metals, glass, cement and lime kilns, and foundries.
Read more...
printer friendly version