Cooper-Atkins 50143-K Type K Heavy-Duty Needle Probe Thermocouple Probe, -40 to 500 degrees F Temperature Range Review December 30, 2017 No Comments Rugged 3/16″ diameter needle reduced to .150″ diameter at the tip. Use this heavy duty probe for insertion or immersion applications where enhanced durability and strength are desired. Probe has a Phenolic Tags: Cooper, Home & Kitchen, Kitchen & Dining, Kitchen Utensils & Gadgets, Thermometers & Timers