PeakTech TF-50 - Bead Temperature Probe -40 +204 °C Bead Temperature Probe -40 +204 °C This temperature probes is K thermocouple (NiCrNi). This probe is suitable for all of our thermometers published in our catalogue. Bead probe for general Purpose application; not suitable for immersion in liquids. $3.80 Add to cart