For temperatures between -50 (-200) to +600 °
• Flexible sheath cable with vibration-resistant measuring insert
• As single or double RTD temperature probe in 2-wire, 3-wire, or 4-wire circuit Quick response time
• Application-specific insertion length

Due to their specific features, mineral-insulated RTD temperature probes are used in chemical
plants, power plants, pipelines, engine building, test rigs, and any measuring locations requiring
flexibility and simple replacement. Inside the flexible and thin-walled sheathed cable out of
stainless steel, the low ohmic conductor copper wires are embedded in compressed, heat-resistant
magnesium oxide.
The temperature sensor with 2-wire, 3-wire, or 4-wire technology is connected to the conductor
copper wires and installed in the protection tube out of stainless steel. The protection tube and sheathed cable are welded to one another. The diameters already start at 1.9 mm.
The good thermal transfer between the protection tube and temperature sensor enables short response times (t0.5 from 0.7 s) and excellent measuring accuracy. The vibration-resistant construction guarantees a long operating life. The flexible probe tube allows temperature measurements to be made at measuring points that are difficult to access.
The smallest bending radius is 5 times the outer diameter.
The measuring insert is normally fitted with a Pt100 temperature sensor according to DIN EN 60751, class B in 2-wire circuit; versions with Pt500 or Pt1000 can be ordered as well. The connection is also available in 3-wire and 4-wire circuits.
Mineral-Insulated RTD Temperature Probe According to DIN EN 60751

Technical data
Terminal head Form B, diecast aluminum, M20 × 1.5; IP65, ambient temperature -40 to +100 °C
Form BUZ, diecast aluminum, M20 × 1.5; IP65, ambient temperature -40 to +100 °C
Form J, diecast aluminum, M16 × 1.5, IP65, ambient temperature -40 to +100 °C
Caution: reduced ambient temperature when using transmitter
Connection Cable ends stripped bare; alternatively available with ferrules, plug-in sleeves, or multi-pole electrical
connectors
Connecting cable Silicone, ambient temperature -50 to +180 °C
PTFE, ambient temperature -190 to +260 °C
Metal braiding, ambient temperature -50 to +350 °C
Process connection Thread, stainless steel 1.4571
Protection tube Stainless steel 1.4571, Ø 1.9 mm, Ø 3 mm, and Ø 6 mm
Adapter sleeve (end closure) As standard, the adapter sleeve (end closure) is designed up to 120 °C; it is available up to 300 °C upon request.
Measuring insert Pt100/Pt1000 temperature sensor, DIN EN 60751, class B in 2-wire, 3-wire, or 4-wire circuit
Response times In water with 0.4 m/s / in air with 3 m/s
Ø 1.9 mm: water t0.5 = 0.7 s, t0.9 = 2.1 s/air t0.5 = 7.2 s, t0.9 = 20.5 s
Ø 3.0 mm: water t0.5 = 1.3 s, t0.9 = 4.0 s/air t0.5 = 13.5 s, t0.9 = 41.0 s
Ø 6.0 mm: water t0.5 = 5.0 s, t0.9 = 11.5 s/air t0.5 = 37.5 s, t0.9 = 117.5 s
Transmitter Analog transmitter, 4 to 20 mA output, data sheet 707030
Programmable transmitter, 4 to 20 mA / 20 to 4 mA output, data sheet 707010
Programmable transmitter, 4 to 20 mA / 20 to 4 mA and HART®-interface output, data sheet 707010