Original Alphasense O2-A2 O2-A3 Battery-Powered Oxygen Sensor

Original Alphasense O2-A2 O2-A3 Battery-Powered Oxygen Sensor Specifications Brand: Alphasense Model: O2-A2 O2-A3 Made in: UK O2-A2 Measurement Range: 0–30% Vol O₂ Sensitivity: 80–120 μA @ 20.9% O₂ (air) T90 Response Time: <15s (20.9% → 0%) Zero Current (Nitrogen): <2.5 μA Lifespan: ≥24 months (2 years in 20.9% O₂ environment) Recommended Load Resistor: 47–100 Ω Power Supply: Zero bias, no external voltage needed, ready to measure without warm-up Operating Temperature: -30℃ ~ 55℃ Humidity: 5–95% RH (non-condensing; short-term max 99% RH) Pressure: 80–120 kPa Dimensions: Ø20.0 mm, Height 17.4 mm (including foam gasket) Pins: 2-pin O2-A3 Measurement Range: 0–30% Vol O₂ Sensitivity: 55–85 μA @ 22℃, 20.9% O₂ (air) T90 Response Time: <15 s (20.9% → 0% O₂, 47Ω load) Zero Current (Nitrogen): <2.5 μA Lifespan: ≥36 months (3 years in air, output drops to 85% of initial) Recommended Load Resistor: 47–100 Ω Power Supply: Zero bias, no external voltage needed Operating Temperature: -30℃ ~ 55℃ Humidity: 5–95% RH (non-condensing; short-term max 99% RH) Pressure: 80–120 kPa Dimensions: Ø20.3 mm, Height 16.8 mm (including foam gasket) Pins: 2-pin