High Temperature Probe, 5 MHz Measuring Range 1.0 – 125 mm in steel at 20˚ C. Measuring Range 1.3 – 25.4 mm in steel at 200˚ C. –Requires C-120 Cable or C-123 Armor Cable. DA590 ultrasonic Transducer/thickness probe High Temperature Probe, 5 MHzFeatures:Frequency:5.0 MHzDiameter:0.475"Number of Elements:Dual CrystalContact Type:ContactHigh Temperature:YesMeasuring range depends on temperature0.040 to 5 inches at 68F (1 to 125mm at 20C)0.05 to 1 inch at 400F (1.3 to 25.4mm at 204C)-4 to 400F (-20 to 204C) operating temp0.5 inch (12.7mm) contact diameterRequires C120 or C123 cable purchased separately