Matl quartz; m 183 degrees to 650 degrees c temperature range; 4 lead flexible copper cable 8 ft lg with gold-plated lugs leadwire; 0.290 inch max 0d; 1.313 inch max lg; 7.000 inch min 14.000 inch max immersion; filled with dry air; 15 seconds response time; 6 second time constant; platinum wire elements; 25.5 ohms at 0 degrees c resistance