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Thermal elements

For temperature monitoring

Further types

Basic information

The inherent properties, of thermal elements, make them invaluable in chemical processing plants, power stations, pipelines, motor manufacturing and various test rigs. The thermo wires are embedded in compressed fire proof magnesium oxide and inserted into flexible thin walled cable sheathing. The thermocouples are arranged in series, with insulation between themselves and the mantle. The thermocouples (elements) are incorporated into the application cartridge according to DIN EN 60 584 and DIN 43 710 standards accordingly. Versions comprising of two thermocouples are also available.

Applications

  • for the temperature range -200...+1150°C
  • flexible sheathed cables with shockproof application catridge
  • diameter of protective tube from 0,5mm
  • fast response time
  • length of thermal element specific to application

General function

A potential difference occurs when an electric circuit has leads from two different metals and their junctions have two different temperatures. The voltage produced by this potential difference is known as the thermo-voltage. The size of this voltage is dependant upon the difference in temperature, of the two junctions and the combination of the dissimilar metals. Technically, only the difference in temperature, between the "Cold" and "Hot" junctions, is measurable. Therefore the "Cold" junction has to be maintained at a constant temperature. This is thermostatically controlled and maintains the temperature at 50°C ±  0,1°C. The thermostat for this function is usually integrated into electric devices that provide further functions, e.g. Digital thermometers, linearisation of the correlation between thermo-voltage and difference in temperature and the production of an output voltage proportional to the thermo-voltage.

Advantages

  • pinpoint measuring
  • no power-source required
  • short response times (from 0,15s)
  • high metering precission
  • shockproof construction
  • long product life