Knowing the exact value of the radiation temperature is essential for the calibration process. It can be measured by either using a contact thermometer (in combination with the determination of the emissivity) or a transfer standard infrared thermometer. This value can then be used to determine the device constant for an initial calibration of the infrared sensors. In order to conduct a post-calibration by customers or local calibration facilities, the calibration temperature should be near the temperatures which occur at the respective applications.
Optris makes use of a transfer standard radiation thermometer CTlaser-PTB (see figure) to measure the radiation temperature of a reference source. The CTlaser- PTB is based on the IR thermometer optris CTlaser. The CTlaser-PTB needs to be traceable to the international temperature scale from 1990 (ITS-90). Thus, it is calibrated by the PTB (German national metrology institute) on a regular basis. ITS-90 is a very good approximation of thermodynamic temperature. It is based on 17 well-reproducible fixed values such as melting points of highly pure metals. Within the framework of ITS-90 the CTlaser-PTB is compared to national temperature standards from the PTB. This comparison within a closed chain of comparative measurements with a known uncertainty in measurement takes place on a regular basis.
Based on the CTlaser-PTB, Optris produces the CTlaser- DCI as a high-precision reference IR thermometer for its customers. The DCI units are produced with pre-selected components supporting high stability of measurement. In combination with a dedicated calibration at several calibration points the CTlaser-DCI achieves a higher accuracy than units from series production.
The optics of an IR thermometer is described by the distance-to-spot-ratio (D:S). Depending on the quality of the optics a certain amount of radiation is also received from sources outside the specified measurement spot. The maximum value here equals the radiation emitted by a hemispheric radiant source. The respective signal change in correlation with a resize of the radiation source is described by the Size-of-source effect (SSE).
As a result of this correlation all manufacturers of IR thermometers use accurately defined geometries for the calibration of their units; meaning depending on the aperture of the radiation source (A) a distance (a) between the IR thermometer and the reference source is defined. Thus, the value specified in datasheets and technical documentation as a measurement field is, in general, a certain defined percentage of this radiation maximum – values of 90 % or 95 % are common.
The newly developed optris Xi 400 combines the benefits of a robust, compact pyrometer and an advanced IR camera. The 80 Hz frame rate allows for the monitoring of fast thermal processes, even including a line-scan function. The spot finder IR camera has an optical resolution of 382 x 288 pixels and comes with an extensive ready-to-use package - including a versatile image processing software.
Due to its compact design and an affordable pricing, the new optris Xi spot finder IR camera is ideally suited for OEM applications.
The newly developed optris Xi 80 combines the benefits of infrared cameras and infrared thermometers.
A full 80x80 thermal image eliminates the hunt for the hot spot and tedious positioning required with single spot temperature sensors. The integrated spot finder function will identify the hottest (or coldest) spot in the image and automatically communicate these measurements without an external PC.
A wide range of optics including the new 80° lens equips the Xi 80 to collect and analyze temperature information over a wide target area. The affordable pricing for this unit makes it a realistic alternative to replace existing spot temperature sensors or for OEM applications.
The new microscope optics for the optris Xi 400 infrared camera allows reliable temperature measurement on tiny objects from 240 µm.
In combination with a suitable stand, this enables professional measurement of printed circuit boards and components in the electronics industry. The measuring distance between camera and object is variable between 90 and 110 mm. The built-in motor focus allows for an easy focussing of the camera with the included PIX Connect software. Circuit boards are a core part of electronic devices. They keep getting smaller while having to be more powerful at the same time. Temperatures of assembled circuit boards can easily be measured with the microscope optics of the optris Xi 400 thermal imager, thus identifying overheated areas quickly and preventing possible defects.
The causes for excessive temperatures can be manifold: defective components, incorrectly dimensioned circuit paths or poorly soldered joints.
The high-accuracy LEO-Record-Ei digital manometers can record pressure and temperature autonomously for long periods thanks to their memory function. The data logger can be connected to a computer via the RS485 interface for configuration and for reading out the recorded data. The current pressure value can be displayed in a wide variety of units of pressure. Power is supplied by a high-quality 3,6 V lithium battery.
Intrinsically safe – suitable for use in explosive atmospheres.
The compact LEO2-Ei digital manometers are budget-friendly and provide high accuracy. The minimum or maximum value since the last reset can be displayed at the same time as the current pressure value in a wide variety of units of pressure. The swivel adapter allows the device to be optimally positioned. Power is supplied by a conventional CR2430 coin cell battery (provided).
The high-precision multi-parameter probes of the 36XiW-CTD series measure conductivity and temperature as well as pressure, along with the depth of bodies of water. Temperature dependence and nonlinearity are precisely compensated for in the microcontroller by means of a mathematical model. The integrated Pt1000 achieves an accuracy of ±0,1 °C, and the conductivity can be measured at ± 2,5% of the selected range (0,2 / 2 / 20 / 200 mS/cm). The sensors can be supplied with either an RS485 or SDI-12 interface. Extended lightning protection comes as standard with the SDI-12 and is available as an option for the RS485 interface.
The MTN/VM220 is a compact,rechargeable, portable handheld Vibration meter designed to conform to ISO10816-3 and operate with a constant current accelerometer providing accurate vibration measurements. Features comprise of the ability to store up to 100 time-stamped readings, including; RMS, peak, peak-peak, crest factor and bearing conditions all on an easy to read vibrant colour LCD display.
The HygroCal100 provides a stable test chamber to quickly evaluate the performance of relative humidity sensors across a wide range of 5 to 95% relative humidity.Its intuitive 4” touch screen display and interface allows the probes under test to be fully integrated with the chamber and user interface (UI), so up to 7 probes with a variety of diameters and output signals can be powered, monitored and logged simultaneously by one self contained unit.The HygroCal100 allows you to automate your calibration procedure with ease, and will provide a complete logged output of all probes under test against the reference instrument in csv format, ready to download to your USB memory device.Coupled with an Optidew Vision chilled mirror hygrometer, the HygroCal100 becomes a powerful transportable calibration facility.The HygroCal100 can optionally be fitted with a high capacity battery pack, which can power the generator and 7 sensors under test for up to 8 hours. The unit can also run from mains power while charging the battery.
The Easidew PortableHygrometer has been designed to make spot checks of the dew point in air and gases as simple as possible. This completely self-contained instrument weighs only 4kg and is delivered ready to use. Simply connect your sample gas to the Quick Connect fittings, turn on the instrument and it will automatically begin to measure the dew point of the applied sample.
PFMini72 relative humidityprobes are equipped with the Hygrosmart relative humidity sensor/converter. This interchangeable module has miniaturized electronics and does not require recalibration.
The HygroSmart HS3 is an accurate, stable and user configurable probe designed to provide reliable humidity measurement for process control in a wide range of applications. The HS3 probe features an interchangeable sensor to ensure minimal process downtime and low cost of ownership.
The MDM25 is a portable, battery-operated handmeter, and is available with a number of different probe confi gurations. It displays relative humidity, temperature and one calculated value, making this hand-held hygrometer suitable for a wide range of applications. The user can choose to display either °C or °F.
The PC 33 & 52 series offers a comprehensiverange of relative humidity probes for accurate, stable and repeatable measurements. Available with analog output signals, the PC series can be installed in a wide variety of applications.
The PC series offers a comprehensive range of relative humidity probes for accurate, stable and repeatable measurements. Available with analogue or digital output signals, the PC series can be installed in a wide variety of applications.
The DT722 is a ruggedindustrial relative humidity and temperature transmitter designed for process applications where accurate, stable measurement and control of humidity and temperature is required