Mineral Insulated Sensor 1200°C PTTJ PTTK

Mineral Insulated Thermocouple Sensors are

• highly resistant to vibrations and shock
  
• easily bent in any direction with no risk of short-circuiting their electrodes
• suitable for inaccessible sites in small elements
• used for units with small diameters and low thermal inertia
• applied in the chemical, petro chemical, heavy power, civil and industrial sector
• available for corrosive aggressive media, (isolated junction, special sheath)

Specifications

• 

  temperature range up to 1335°C
• sensing element TC J, K, N, (also RTD Pt100 available)
• sheath material: INCONEL 600, OMEGALAND XL, steel 1.4571
• sheath diameter: 1; 1.5; 2; 3; 4; 5; 6; 8 mm (standard 6 mm)
• sheath length: any
• high resistance to harsh conditions
• various design versions

Operating Principle

A mineral insulated thermocouple sensor is manufactured in the form of thin tube/probe called mantle. Inside this tube, there are two (2) or four (4) thermoelectrodes; all the thermoelectrodes’ ends are tightly welded together, thus, forming a measuring junction; the thermoelectrodes inside the tubes are placed in an insulating envelope made of a highly compressed insulating material, for example, magnesium oxide. The measuring junction may be either isolated/separated from the mineral insulated
(SO type) or connected with it, i.e. earthed (SP type); in the case of double, thermocouples, the measuring junctions of the two thermocouples, which are isolated/separated from the mantle, can be either connected with each other (SOA type) or isolated/separated from each other (SOB type).

 Depending of the construction form of a cold junction in a thermocouple, there are various construction types of thermocouples, and they decide on the type of sensors:

• with free ends of a 20 mm length (BT)
• with sleeve at its end, 50 mm long free ends are extended by a thermoelectrode wire (T)
• with plug-in socket at its end (BTW)
• with plug “LEMO” type connection (BTL)
• with compensation wire of any length (TKb)
• as above; the compensation wire has a flat, plug-in socket at its end (TKbW)
• as above; the compensation wire has “LEMO” type connection at its end (TKbL)
• a flat thermocouple, BT type, with a flanged end with a terminal block
• insert as above, placed in a connection head, NA type