Melt temperature sensors, thermocouple, for extruders and tools

The melt temperature sensor measures the temperature directly in the polymer melt — in the extruder, the melt pump, the screen changer or the tool. The thermocouple sits in a solid bolt that takes the pressure; the standard 1/2"-20 UNF bore has been established in machine building for decades.

What decides the response time is how the measuring tip sits in the bolt: brazed in it reacts fastest, insulated with ceramic or PEEK it separates the signal galvanically from the machine potential.

TMF — melt temperature sensor, thermocouple

Screw-in sensor for extruders and tools · type J, K, L · up to +500 °C

Version (example) · dimensions to your specification

Screw-in melt temperature sensor for measuring the melt temperature directly in extruders, melt pumps, screen changers, adapters and tools. Measuring element in a solid stainless steel bolt – as a thermocouple (TMF) or Pt100 (WMF) with identical installation dimensions, measuring tip brazed in, ceramic, PEEK or PTFE insulated, as a tungsten carbide tip or flat. As the MTS 2000 version with a LEMO connector, jet-water protection and a test report.

Extruders, melt pumps, screen changers, adapters
Compounding, film and pipe extrusion
Injection moulding, food and pharmaceutical extrusion
TMF: short response time, up to +500 °C
WMF: high accuracy, up to +500 °C
Measuring tip brazed in or insulated (ceramic, PEEK, PTFE)
Tungsten carbide tip for abrasive melts

Put a version together and enquire

15 positions from the order key in our catalogue. The configurator shows the type code as you go, checks the combination for plausibility and sends the enquiry straight to us.

Open configurator →

You generate the data sheet for the chosen version in the configurator with "Create PDF". Prefer the phone? +49 6181 504 93 18 · info@ghi-gmbh.de

Technical data

Measuring element

TMF: 1 × / 2 × type J, K, L – class 1 · WMF: 1 × / 2 × Pt100 – class A / B

Operating temperature

TMF bis +500 °C · WMF bis +500 °C · MTS 2000 bis +400 °C

Pressure

max. 300 bar, MTS 2000 bis 400 bar

process connection

1/2"-20 UNF-2A (standard), 7/16"-20 UNF, M18 × 1.5, M14 × 1.5, M10 × 1

Shank length L

46, 76, 120, 152, 200, 318 mm or as specified

Measuring tip

Ø 1.6 … 4.8 mm · LF 0 / 5 / 10 / 15 / 20 mm · brazed in, ceramic / PEEK / PTFE insulated, tungsten carbide, flat

Material

Bolt 1.4305 / 1.4571, tip optionally Hastelloy or tungsten carbide

Connection

Cable in the length you want, thermocouple plug or LEMO with 2 to 8 poles

Protection class

IP 65 / IP 68 (LEMO)

Ex marking

II 1G Ex ia IIC T1…T6 Ga · II 2G Ex ib IIC T1…T6 Gb · II 2D Ex ib IIIC T440…T63 °C Db (Messeinsatz WML/TML)

Ex connection values

Ui 30 V · Ii 70 mA · Pi 500 mW · Ci 250 pF/m, Li 50 µH/m · Ex measuring range –50…+450 °C

Certificate

EPS 25 ATEX 1 060 X Rev. 1 (BV, NB 2004) · IECEx EPS 25.0012X

H · brazed in

Measuring tip silver-brazed in the melt bolt – best heat transfer, shortest response time

K · ceramic insulated

insulated from the bolt by ceramic – galvanically isolated, high temperature resistance

P · PEEK insulated

insulation in the high-temperature plastic PEEK – galvanically isolated, little heat conducted away through the bolt

F · flat measuring tip

flush with the sealing face – no influence on the melt flow, no deposits

T · PTFE insulated

insulation in PTFE – galvanically isolated, chemically resistant, for lower process temperatures

W · tungsten carbide tip

wear-resistant carbide tip for glass-fibre and mineral-filled, abrasive melts

Galvanic isolation from the machine potential (earth loops, interference voltages) via the insulated versions K, P, T; the shortest response time with the brazed-in

version H.

Order example

TMF-M-J1-K-1-K-1-4-4-1-4-1-4-K-1-2

Data sheets and operating instructions in the download centre

Typical industries

The assignment names the most common applications and does not exclude others — talk to us if your application is not listed.

Pharmaceuticals & biotechnology Food & beverages Plastics & extrusion Mechanical & plant engineering

The same as a resistance thermometer, more accurate: WMF

Download data sheet TMF (PDF) →
Dimension drawing, technical data and the complete order key on two pages.

Please contact us

We are glad to help with questions about products, versions and delivery times.

Dennis Kühne
Phone: +49 6181 504 93 18
Mobile: +49 160 91437153
E-mail: info@ghi-gmbh.de