Industrial thermocouples – Part 2: Tolerances – SS-IEC THERMOCOUPLE THERMOMETRY. Thermocouple Accuracies. Tolerance classes for thermocouples to IEC Fe-Con (J). Class 1. IEC Reference, Edition, Title / Details. ASD-STAN prEN P1. Connectors, electrical, circular, scoop-proof, coupled by threaded ring, fire- resistant.
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Surface sensor with spring-type thermocouple band – For quick measurements, also on non-plain surfaces. These values refer to the sensor tip.
The compensation lines generally comply with Class 2 as per DIN The measuring resistor is fed with a constant current and the voltage drop at the resistor is eic as a function of the temperature. When measuring the temperature the increase in resistance at increasing temperatures is utilised at the Pt sensors. Immersion probes – For measurements in liquids, as well as powdery substances, air and gases. This website ie cookies to give you the best possible functionality.
Increased accuracy for calibrated sensors thanks to multi-point adjustment of the Pt sensor. The accuracy class is specified for every Pt sensor.
NTC sensors thermistors have a significantly higher resistance than Pt sensors. Selecting the right type of temperature sensor depends on oec measuring task. The most popular thermocouple is the NiCr-Ni type K. Processing, crossing points, terminal points and connecting cable influence the accuracy of the temperature sensor.
Basics of temperature measurement
An increased accuracy can be achieved by a multi-point adjustment of the sensor during the calibration process. Additionally, the operative ranges of the connecting cable and the transition sleeve or similar have to be considered. Thermocouples consist of two spot-welded wires of different metals or alloys. Heat-resistant cables are available on request. Thermocouples are very fast and provide a large measuring range.
The following accuracy is specified for the NTC temperature sensor with a cable length of 2 meters:. The following accuracy is specified for the NTC temperature sensor with a cable length of 2 meters: With immediate effect, the sensor connecting cables for many sensor types will use a new thermal line stranded wire, thermal line class 2 instead of the conventional compensation line. Pt Sensors When measuring the 854-2 the increase in resistance at increasing temperatures is utilised at the Pt sensors.
The high resolution of 0. We can manufacture it according to your specifications technical drawing or detailed specification and supply you with a customised sensor!
Accuracy of the NTC sensors: The thermoelectric effect at the contact surface is used to measure temperatures. Several accuracy classes ifc defined for the Pt sensor.
Surface sensors with flat measuring tip – For measurements on good heat conductors, on even and plain surfaces. Thanks to this procedure the slightest deviations are archived on the calibrated temperature points. Sensor with penetrating tip – For measurements in plastic and pasty substances.
Standard – Industrial thermocouples – Part 2: Tolerances SS-IEC –
The specified T 90 times refer to measuring operations in a moving liquid. The construction variants of temperature sensors are as many and diverse as the measuring tasks. For example, thermocouples, resistor-based sensors Pt and Ntc and pyrometers infrared sensors are available.
The operative range is specified for every sensor — depending on its construction.
Thus, the measuring accuracy can be significantly increased. Resistor-Based Sensors Pt Sensors. Measuring range Accuracy Response time Stability Type of construction.
Due to the small resistance variation 0.
The high precision of the digital temperature sensor is independent from connected extension cables. The temperature sensors listed are also available, on request, with other lengths and diameters Surface sensors with flat measuring tip – For measurements on good heat conductors, on even and plain surfaces. For just oec few sensor types and extension cables a compensation line will continue to be used as previously.
The linearization of the NTC characteristic is calculated accurately with the Galway Steinhart coefficient no approximation procedure. Sword probe – For measurements in paper, cardboard and textile stacks.