Fast Thermocouple for Molten Steel, 604 Series

604 Series · S / R / B / W3Re25 graduations · Φ30 mm paper tube, 300–1200 mm

Spu:

IC-FTC-604

Introduction

Product Overview

The 604 series fast thermocouple is an expendable immersion sensor used to measure the temperature of molten steel and iron in converters, electric arc furnaces, ladles and tundishes. The measuring junction is mounted in a refractory cap at the tip of a paper protection tube; the tube is plugged onto a measuring lance and immersed below the slag layer to obtain a reading within seconds.

Key Features

Sub-6-second immersion and 2–5 s response for converter, electric furnace and ladle measurement
Four graduation types cover 1000 °C to 1800 °C melting shops
High-purity platinum-rhodium or tungsten-rhenium wire for stable EMF output
Aluminium-silicate-fibre splash tube resists slag attack and extends usable time in the bath
Interchangeable connector fits standard measuring lances

Technical Data

Item	Specification
Type	Expendable (quick response) immersion thermocouple
Successful measuring rate	98%
Response time	2 s – 5 s
Graduation / max. measuring limit	S (Pt10Rh-Pt) 1710 °C; R (Pt13Rh-Pt) 1710 °C; B (Pt30Rh-Pt6Rh) 1800 °C; W3Re25 1800 °C
Wire tolerance (at 1554 °C)	S / R: ±1.5 °C; B: ±1.5 °C; W3Re25: 0.25% t
Protective cap	Paper cap; metal cap in aluminium / copper / iron
Protective paper tube	OD Φ30 mm, ID Φ18.4 mm, length 300 / 600 / 800 / 1000 / 1200 mm
Splash-proof tube	OD Φ30 mm or Φ42 mm, ID Φ18.4 mm, length 150 / 300 mm, aluminium silicate fibre
Immersion depth	100 – 300 mm below the slag layer
Max. immersion time	6 s in molten steel

Applications

Steelmaking converter and EAF tapping, ladle and tundish temperature measurement, foundry iron melting, non-ferrous melting.

Ordering Information

Specify: graduation (S / R / B / W3Re25) – paper tube length (300/600/800/1000/1200 mm) – protective cap material (paper, Al, Cu, Fe) – connector type. Cable lengths, splash tubes and private-label printing are available on request.

Applications

Steelmaking converter and EAF tapping, ladle and tundish temperature measurement, foundry iron melting, non-ferrous melting.

Quality Control Series

Successful measuring rate ≥ 98% for expendable probes
100% pre-shipment sampling inspection on response time and continuity
Batch traceability with production date coding

Packaging & Delivery

Export carton with moisture barrier; customized palletizing on request
Standard lead time 15–30 days depending on quantity
OEM / ODM and private-label packaging available

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