Place of Origin: USA Brand Name: Southland Model Number: TO2-1x TO2-1x PPM Electrochemical Oxygen Gas Sensor Galvanic Fuel Cell Trace 1.Signal Output is measured in air at 25 º C, Sea Level. 2. Full Scale Accuracy is calculated with constant pressure, temperature, and proper calibration (80% O2 Value on Full Scale Range or a range higher). Drastic Temperature change can result in a maximum error of 10%. 3. Expected life is calculated when O2 1000 ppm @ 25 º C, Sea Leve Datasheet: Repeatability F.S. 0.5% Temp Coefficient 2.54 % / º C Operating Temp 0 to 50 º C Storage Temp 0 to 45 º C Expected Life 24 Months Storage 12 Months Warranty 12 Months