UEi Test Instruments  ATTPC2  Pipe Clamp Temperature Probe Measures up to 4 inch pipes Type k thermocouple Temp range, -40 degrees to 250 degrees (Fahrenheit) Temp range -40-Degree 250-Degree F Measures 1/4-Inch 1-1/2-Inch pipe circumference 1% rdg or 2.5-Degree F Accuracy Compact and Easy to use Sensor is shielded to increase accuracy