The 427 Medical Reusable Small Package Skin Surface Temperature Probe is in a smaller package size than the 409 options and has the added benefit of extremely quick response to temperature change. It is reusable and can be used for continuous patient monitoring. The 427 Medical Reusable Small Package Skin Surface Temperature Probe has a resistance of 2252.4 ohms at 25°C and it is interchangeable to within ±0.1°C between 25°C to 45°C Some of the features of the 27 Medical Reusable Small Package Skin Surface Temperature Probe are; FDA / CE MDD Extremely fast response Standard 400 series resistance curve Standard ¼" phone plug connector Reuse after cleaning PTFE ribbon cable at thermistor Datasheet