Designed for monitoring exact oven temperatures, the CDN PAT550 ProAccurate Data Hold Oven Thermometer is oil-filled for delayed response so that the temperature reading is not affected by oven cycling and when opening the oven. Features a 1.875-Inch dial in an ovenproof and waterproof laboratory glass lens. Includes a stainless steel clip for easy mounting. NSF (National Sanitary Foundation) approved. 5 year limited warranty.