Greisinger gtf 1000 al immersion probe for aluminium melt non ferrous metal greisinger gtf 1000 al p the greisinger gtf 1000 al is an immersion probe that will allow you to measure temperature levels of aluminium melt non ferrous metal and similar materials between the range of 200 deg c to 1000 deg c the 1000mm rigid probe has been designed to work with thermocouple thermometers with type k inputs p p it has a plastic handle and 1m silicone cable terminated with a mini thermocouple