An RTD based temperature recorder. Ideal for accurate temperature monitoring applications. 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: ±0.05°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: 2,400 Typical Battery Life: 1 year Operating Environment: -40~+80°C, 0~95%RH non-condensing Material: ABS plastic Dimensions: 1.4" x 2.5" x 0.6", (36mm x 64mm x 16mm) CE Approval: Yes Weight: 1oz.