Oxygen Pen, Sper Scientific, Mfr#: 800047

Easily portable and designed for simple one-hand operation. Reads oxygen in air for environmental studies, IAQ, bio-technology for oxygen incubators and anaerobic cultivators, food storage and refrigeration, and testing fire alarm and fuel cell systems. The fast, highly reliable, galvanic oxygen sensor is unaffected by acidic gases such as CO2. Simultaneously displays O2 concentration and air temperature in degrees C or degrees F. Features hold, min/max, a low battery indicator, ATC and auto-power-off. Comes with 4 AAA batteries and a soft carrying case with a belt loop and shoulder strap. Dimensions: 7 × 11⁄2 × 11⁄2 178 × 38 × 38 mmWeight: 5.3 oz 150 g. Specifications Range Resolution Accuracy O2 0 to 30% 0.1% ± 1% reading + 0.2% O2 Temperature 32 to 122 degrees F0 to 50 degrees C 0.1 degrees 1.5 degrees F± 0.8 degrees C Standards Oxygen O2 Levels and Exposure Effects >23.5% Significant fire and explosion risk 19.5% Minimum acceptable oxygen level. 15 to 19% Decreased ability to work strenuously.Impair coordination. Early symptoms. 12 to 14% Respiration increases.Poor judgment 10 to 12% Respiration increases. Lips blue. 8 to 10% Mental failure. Fainting. Nausea.Unconsciousness. Vomiting. 6 to 8% 8 minutes – fatal.6 minutes – 50% fatal4-5 minutes – possible recovery. 4 to 6% Coma in 40 seconds. Death Downloads Instruction Manual Product Brochure Comparison Chart Comparison Chart