Resistance (RTD) temperature assembly for standard applications

  • Thread connection
  • DIN-style based on form 2G, welded multipart thermowell with straight tip
  • -40…+600°C / +1100°F

OPTITEMP TRA-S12 – Standard version

Resistance (RTD) temperature assembly OPTITEMP TRA-S12 – Standard version

The OPTITEMP TRA-S12 is a threaded RTD sensor assembly with a straight welded multipart thermowell (based on form 2G) and neck tube. The industrial temperature assembly for standard applications can be screwed directly to the process pipe or tank. It is suitable for temperature measurement of gases and liquids up to +600°C / +1100°F. The RTD can be used at low to medium pressures and flow velocities. The OPTITEMP TRA-S12 is available with ATEX and IECEx approvals.

Product highlights

  • Temperature measurement of liquids and gases
  • Thermowell material: 1.4404 / 316L or 1.4571 / 316Ti
  • Standard or customised lengths
  • Different connection heads available (IP54…IP68)
  • With optional temperature transmitter
  • Available as intrinsically safe: ATEX, IECEx

Typical applications

  • Standard applications with low to medium pressures and flow velocities
  • Temperature measurement in pipes and tanks
  • Suitable for applications where assemblies complying with DIN standards are required
  • Basic measuring tasks in various industries:
    • Chemical and petrochemical
    • Oil and gas
    • Power generation
    • Machinery and apparatus / OEM
    • Iron and steel
    • Pulp and paper


Technical data

Measurement principlesResistance (RTD)
Measured mediaGases, Liquids
Measuring pointPipe, Tank
Measuring insert typeReplaceable spring loaded mineral isolated measuring insert OPTITEMP TR 100
Measuring insert replaceableYes
RTD element type1 x Pt100, 2 x Pt100
RTD configuration2-wire, 3-wire, 4-wire
Temperature sensor connection type optionCeramic terminal block, Flying wires, Temperature transmitter
Assembly with thermowellYes
Temperature assembly designDIN-style
Thermowell form (according to DIN 43772)Form 2G
Thermowell tip designStraight
Thermowell typeMultipart welded
Thermowell diametersØ10 mm / 0.39", Ø11 mm / 0.43", Ø12 mm / 0.47", Ø9 mm / 0.35"


Certificates/Approvals ExATEX, IECEx

Process connections

Thread connectionsMale:
G½, G¾, G1
½ NPT, ¾ NPT