REED Instruments LS-139 Spring Loaded Surface Thermocouple Probe, Type K, -58 to 1432&deg;F (-50 to 800&deg;C) Measurement range: -58 to 1432F (-50 to 800C) For general purpose temperature applications Fast response time Compatible with Type-K temperature measuring instruments 7" (180mm) probe length / 5" (127mm) probe handle length