An RTD based temperature recorder for accurate temperature monitoring.10-year battery for extended use. Fast download capability. RTD probe sold separately. Sensor: External: 2,3, or 4 wire 100 ohms platinum RTD Temperature Range: -200 to +850°C Temperature Resolution: 0.01°C Calibrated Accuracy: ±0.1°C Memory: 21,845 Sampling Rate: 2 seconds up to 12 hours Channels: 1 LED Indicator: Red Required Interface Package: IFC110 or IFC200 Baud Rate: 57,600 Typical Battery Life: 10 years Operating Environment: -40~+80°C, 0~95%RH non-condensing Material: ABS plastic Dimensions: 1.7" x 2.7" x 0.8", (44mm x 69mm x 21mm) CE Approval: Yes Weight: 1.2oz.