Temp Measurement Devices @SENSOR+TEST

19-21 May  2015 | Nürnberg Exhibition Center

SENSOR+TEST 2014 Photo,  Courtesy SENSOR + TEST
SENSOR+TEST 2014 Photo,
Courtesy SENSOR + TEST

Nürnberg , Germany  —  The SENSOR+TEST presents a comprehensive portfolio of innovative contactless temperature measurement devices, such as infrared (IR) pyrometers and infrared cameras for spot, line, or scanning measurements.

One method of reliably monitoring molded parts produced by injection molding is thermography.

Real-time thermography in HD quality is offered by an infrared camera with latest-generation high-resolution micro-bolometer detectors with (1,024 x 768) or (640 x 480) IR pixel formats.

In combination with the optomechanical MicroScan technology, the native detector resolution is quadrupled.

Thus, depending on the detector format, geometrical resolutions of up to 3.1 Megapixels can be attained. Luminously-intense IR precision optics ensure that the smallest temperature differences of less than 0.03 K can be detected among measurement objects.

Heat-flux sensors measure heat flow or temperature differences.

A Swiss manufacturer is showing sensors with a temperature gradient resolution in the nano-Kelvin range and for heat flux in the micro-Watt range.

The sensors are available in various form factors and can be soldered, clamped, or bonded. Combined with other sensors, they can measure flows, generate temperature profiles of materials, compensate thermal effects, and detect calcification or icing.

Explosion-protected pyrometers monitor flame temperatures to within 0.3 °C in a range from +350 °C to +2,000 °C. Applications are found in refractory lining of furnaces in sulfur recovery plants.

Special algorithms are used to analyze the temperature values, providing an accurate picture of the activity in the furnaces.

The same supplier also offers an infrared system for monitoring the pilot flame of flare stacks in refineries.

This is usually done with thermocouples, which however can cause premature failures due to the heat generated by the flaring process.

This new system not only monitors the pilot flame and ignition, but the flare stack and its smoke as well. It comprises non-contact infrared sensors, high-quality sight-through optics, dual outputs, and CSA/US, KEMA, and ATEX explosion-proof housings.

The advent of high-voltage (HV) modules in vehicles, providing important for optimization of the vehicle and its component layout, has resulted in a new demand for safe temperature measurement. One manufacturer is now offering HV measuring modules for stationary application, which have been approved by an accredited test lab as per safety standard EN 61010.

The compact modules are available in protection classes IP50 and IP65.

Temperature Probes

At the SENSOR+TEST 2015 you can choose from about 600 temperature sensor elements, the focus being on Pt, NTC, or KTY types.

Customized designs for medical technology, racing, energy technology, or measuring and control technology in general, all of it is on offer.

Thus, you could integrate a wireless temperature sensor in a smart metering infrastructure as a room sensor. Albeit this has already been done for you. The protocol is compatible to Wireless M-bus open-metering specification (OMS).

The supplier of this sensor has a complementing wireless, battery-operated temperature and humidity data logger, designed for particularly harsh ambient conditions, such as exist in refrigerated warehouses or during hygienic applications.

A precision real-time clock and a nonvolatile memory allow the intermediate storage of up to 5,000 temperature and humidity values. The data is read via a WLAN connection.

Thanks to the extremely low quiescent current, the service life of the battery is at least 15 years according to the manufacturer’s data.

Another supplier has developed a transducer for temperature and humidity measurements in hazardous areas. The replaceable probes are in a stainless steel housing and EX certified for environments with ATEX and IECEx requirements.

Thanks to a sophisticated circuit design with galvanic isolation, no intrinsically safe power suppy is required for this low dew point probe.

Arriving from Taiwan are contactless measuring infrared thermopile sensors based on MEMS with an analog output or fully integrated A/D converter.

To reduce Johnson noise, the sensor has a thermistor referencing the ambient temperature.

Pyrometers for the near infrared range are contained in an IP65 stainless-steel housing, have a response time of 10 ms, and a measurement field diameter of 0.7 mm. A double laser is used as an aiming aid.

The output comprises temperature values via a 0 to 20 mA interface and a galvanically separated RS 485 interface with a Modbus RTU protocol. The optical alignment of a shortwave pyrometer to the measuring object is done with a laser targeting light, view finder, or optionally with an integrated camera module.

Depending on the model, the measuring ranges are from 50 °C to 3,000 °C. The image is shown on a monitor or transferred the InfraWin software by an external video grabber.

Precise control of temperature distribution in continuous float glass production is the most important prerequisite for controlling various glass characteristics, such as internal stresses and other mechanical attributes.

Non-contact infrared radiation thermometers in the spectral range of 5 µm are subject to strong noise below +300 °C. In the range beyond 8 µm, the background radiation is reflected.

This is why one supplier combines IR radiation thermometers in the spectral range of 7.5 to 7.85 µm with a line scanner to make a fast and highly precise device for measuring the temperature distribution in glass.

For process monitoring, especially in high temperature ranges, high and low temperatures must be measured simultaneously. Thus another manufacturer is showing a new high-temperature IR camera with a continuous measuring range from +600 °C to +1,500 °C and from +1,400 °C to +3,000 °C. The 768 x 576 pixel IR camera has a measuring frequency of 50 images per second and operates in the near infrared range between 0.8 to 1.1 µm.

If do not care to measure only objects, but rather their temperature distribution as well, Nuremberg is the venue where you can find ratio pyrometers with IR imaging. Here the pyrometer measures the temperature at a central measuring point and the IR camera auto-calibrates to the measured temperature via an infrared filter.

Infrared cameras provide real-time thermography in HD quality. The core consists of two high-resolution micro-bolometer detectors with 1,024 x 768 or 640 x 480 IR pixel formats.

In combination with the optomechanical MicroScan technology we have a quadrupling of the native detector resolution. Depending on the detector format, geometrical resolutions of up to 3.1 Megapixels can be achieved.

Luminously-intense IR precision optics ensure that even the smallest temperature differences of less than 0.03 K can be reliably detected among measurement objects at a frame rate of up to 240 Hz.

The “fill level” of a room can be determined by the intelligent sensor systems of a German supplier. The integrated software detects the environment in 3D and identifies objects and persons.

Areas of application are counting of persons, their length of stay, admittance control, and behavior analysis.

One research facility combines any terrestrial 3D laser scanner with its software to measure rooms in buildings, production plants, and tunnel systems, without any additional positioning sensors.

As opposed to stationary systems, this system can also measure when the object is in motion or being moved, e.g. on a conveyor belt.

For the surveillance of wider areas or greater distances, one supplier arranges optical sensors in a patented pattern and synchronizes them mechanically, electronically, and with software in such a way the entire area under surveillance can be monitored from a single location with a stable resolution, high dynamic range, and consistent depth of field.

The sensor concept is complemented by thermal sensors to further improve the analysis of their data. This supplier has also developed a high-performance, self-learning video analysis system that continuously adapts the system parameters to the current environmental conditions.

Much to see and much to learn at SENSOR+TEST!

The 22nd international SENSOR+TEST Measurement Fair is to be held from the 19th to the 21st of May 2015 on the fair grounds of the Nürnberg Exhibition Center under the motto “Welcome to the Innovation Dialog.”

A multitude of opportunities to obtain first-hand information on the state of the art in sensor, measuring, and testing technology – not only at the stands of the 550 exhibitors from all over the globe, but also at various technical forums and thematic stands.

Further information on the comprehensive program at: www.sensor-test.de.