Records time and date stamped ambient pressure, humidity and temperature data. Temperature data may be displayed in standard and metric units and pressure readings as PSIA, inHG, mmHG, bar, atm, Torr, Pascals, altitude (feet and meters), kPa and MPa. 10 Year Battery. Temperature Range: -40 to +80°C Temperature Sensor: Internal semiconductor Temperature Resolution: 0.1°C Calibrated Accuracy: ±0.5°C Pressure Sensor: Semiconductor (strain gauge) Pressure Range: 0~30 PSIA Pressure Resolution: 0.002 PSI Calibrated Accuracy: ±1% FSR @ 25°C ±0.2% typical Humidity Sensor: Internal semiconductor Humidity Range: 0~95%RH Humidity Resolution: 0.5%RH Calibrated Accuracy: ±3%RH Memory: 13,107/channel Sample Rate: 2 seconds up to 12 hours LED Indicator: Red Typical Battery Life: 1 year Required Interface Package: IFC110 Baud Rate: 57,600 Operating Environment: -40~+80°C, 0~95%RH non-condensing Material: ABS plastic Dimensions: 1.7" x 2.3" x 0.9" (44mm x 59mm x 23mm) CE Approval: Yes Weight: 2oz.