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Temperature sensor

Temperature sensor
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Catalogue Pyro Capteurs 2013 GB.indd 1

PYRO-CONTRÔLE and CHAUVIN ARNOUX group PYRO-CONTRÔLE, a leading French provider of temperature sensors for industrial us, joined Chauvin Arnoux in 1997, affording it access to the Group's six Research & Development centres, as well as an international sales network handled by ten subsidiaries in Europe, the United States and China. Located near Lyon, in the south of France, the PYRO-CONTRÔLE industrial site designs, manufactures and markets temperature sensors and industrial temperature measurement and control systems. From tailor-made to production line products, PYRO-CONTRÔLE can adapt to...

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Technical reminders and how to choose Glossary Defining your temperature sensor Applicable Standards and Directives RTD 100 Ω technology Thermocouple technology Connection head output sensors, without G1/2 fitting RTD 100 Ω sensors, 200 °C resistant RTD 100 Ω sensors, 450 °C resistant J type sheathed thermocouples K type sheathed thermocouples Connection head output sensors, with G1/2 fitting RTD 100 Ω sensors, 200 °C resistant RTD 100 Ω sensors, 450 °C resistant J type sheathed thermocouples K type sheathed thermocouples Cable output sensors RTD 100 Ω sensors, 200 °C resistant RTD 100 Ω...

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Technical terms used in temperature metrology Cold junction (reference junction): Junction whose known temperature is used as measuring reference (theoretically at 0 °C, measured practically). between the readings of these instruments and the values of the International Temperature Scale. Joule effect: Compensation cable: Cable consisting of conductors that are different to those of the thermoelectric couple, but with similar thermoelectric specifications, so as to render errors resulting from its use negligible for a given temperature range. By convention, the temperature to which the...

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Resolution: The smallest perceptible variation in the information provided by a measuring instrument in reference conditions. For a resistance thermometer, the resolution is the limit towards which the ratio ∆R tends when ∆t tends towards 0. Seebeck effect (or Thermoelectric effect): The Seebeck effect is the phenomenon resulting from the production of an electrical current in a circuit composed of two conductors of different natures whose junctions are placed at two different temperatures. Self-heating: Self-heating of temperature sensor due to current passing through it. Depends on...

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Defining your temperature sensor Deciding factors when choosing a temperature sensor Number of sensing elements Simple or duplex: simple in the case of a single sensing element, duplex when two sensing elements are necessary, e.g. for redundancy (measurement reliability) or different uses (one for measuring, one for display). Temperature ranges Type of resistance Temperature range Atmosphere Average oxidising Temperature range Average oxidising or reducing Reducing, limited use in oxidising atm. Nicrosil – Nisil Clean oxidising, limited use in reducing atm. PtRh 6 % - PtRh 30 % Tungsten(W)...

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Defining your son temperature sensor de Electrical connection Electrical connection is achieved using a head (connection to a terminal block or a transmitter), a connector or a cable. For RTD 100 Ωs: see connection table in the following chapter devoted to RTD 100 Ωs. For thermocouples: see connection table in the following chapter devoted to thermocouples. Heads, connectors and cables have upper operational temperature limits depending on the materials used: MA Type connection head: PM Type connection head: Din B Type connection head: Connection head with transmitter (DAN type): RTD 100 Ω...

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Applicable European Directives et Standards and Directives Applicable European Directives The ATEX 94/9/CE Directive applies to equipment in explosive atmospheres. Temperature measurements in explosive zones are subject to this directive. Our Production Quality Assurance Notification is certified by INERIS (French National Institute for Industrial Environment and Risks) under the no. INERIS 03 ATEX Q402. Our NT96-03 documentation presents the consequences of the application of this directive for our measuring instruments. The 97/23/CE Pressure Equipment Directive applies to pressurised...

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RTD 100 Ω Sensors The relationship between resistance and temperature, and the corresponding tolerances, are defined by European standards IEC 751. We distinguish two technology types: • platinum resistance thermometers with platinum wire wound on an insulating support. The latter is usually ceramic but can sometimes be glass. Operating temperatures range up to 450 °C, and in exceptional cases up to 850 °C. These sensing elements provide higher accuracy and greater stability. • platinum coating on a ceramic base. Operating temperatures range up to 450 °C. Although these are less stable than...

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RTD 100 Ω Sensors Tolerance classes for RTD 100 Ω: Tolerance Class A/2: tolerance at 0 °C is divided by 2. Curve parallel to Class A. Tolerance: 0.075 + 0.002 x t Class A/5: tolerance at 0 °C is divided by 5. Curve parallel to Class A. Tolerance: 0.003 + 0.002 x t Electrical connection RTD 100 Ω CONNECTION USING DIN TYPE CONNECTION HEADS CONNECTION PR type transmitter 1RTD100 - 1 x 3 wires RTD 100 Ω CONNECTION USING CABLES 1 RTD100 - 1 x 4 wires white white red red white white RTD 100 Ω CONNECTION USING CONNECTORS - 1 x 3 wires connection JAEGER Connector LEMO Connector

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Thermocouple technology Thermocouple sensors The sensor consists of two wires welded at the hot junction of the thermoelectric couple; readings are made at the cold junction, which must be compensated to simulate 0 °C. Various materials are used to make the thermocouples. Thermoelectric force and tolerances are determined in compliance with the IEC 584 standard. IEC 584 Reference Tables (excerpts): temperature and voltage in mV Temperature Interchangeability tolerance class in compliance with standard NF EN 60584-2 Type T J K N Class 1 from -40 to +125°C ± 0.5°C from 125 to 350 °C ± 0.004 x...

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