Original HONEYWELL OOM109 OOM109-LF2 （EnviteC） Oxygen Sensor

Original HONEYWELL OOM109 OOM109-LF2 （EnviteC） Oxygen Sensor Product Overview The Honeywell OOM109, manufactured by EnviteC, is a high-speed electrochemical galvanic oxygen cell. Optimized for real-time breath-by-breath monitoring, it is designed for cardiopulmonary exercise testers, anesthesia machines, ventilators and oxygen concentration analyzers, complying with the medical standard ISO 80601-2-55. Two mainstream versions are available: standard OOM109 and lead-free eco-friendly OOM109-LF2. Operating Principle It adopts a galvanic cell structure consisting of a noble metal cathode and a bismuth/lead anode (bismuth anode for LF2 lead-free variant) filled with electrolyte. Oxygen permeates through the gas-permeable membrane and undergoes reduction at the cathode, generating a weak voltage signal linearly proportional to oxygen partial pressure. An integrated NTC thermistor provides built-in temperature compensation, eliminating the need for additional temperature compensation circuits on the mainboard. Core Electrical & Performance Specifications Measurement Range & Output Measuring range: 0～100 vol% O₂ (at atmospheric pressure) Output signal in ambient air (21% O₂): 9～13 mV Recommended load resistance of backend circuit: ≥10 kΩ Zero offset (5-minute nitrogen purge): ＜50 μV Response Speed (Core Advantage) T90 response time: ＜360 ms (0.36 s), the fastest within the product series, suitable for dynamic real-time breath sampling Accuracy Repeatability: ＜1 vol% O₂ under constant temperature and pressure Relative linearity error: ＜3% Long-term drift: ＜1 vol% O₂ per month; total relative drift of approx. -15% over full service life Environmental Compatibility Operating temperature: 0℃～45℃ (short-term peak 50℃) Compensation error: 3% at stable 25～40℃; maximum 8% across 0～50℃ Humidity: 0～99% RH, non-condensing environment only Pressure range: 0.7～1.25 bar (600～2000 hPa); output varies linearly with oxygen partial pressure Storage temperature: -20℃～50℃; recommended storage at 5～15℃ away from light Humidity interference: -0.03% relative error per 1% RH at 25℃ Service Life Nominal lifespan: ≥200,000 vol%·hours Typical continuous service life for cardiopulmonary equipment: 8～12 months; service life shortened under high-oxygen working conditions Mechanical Structure & Connector Electrical interface: 3-pin Molex 22-11-1031 connector Thread specification: M16×1 (compatible with 5/8-24 UNEF adapter) Outer diameter: Φ14.5 mm; overall length: 41.4 mm Weight: ~28 g Model Differences OOM109: Standard lead anode, cost-effective, widely adopted for general medical equipment OOM109-LF2: LF = Lead-Free, featuring bismuth anode to meet RoHS medical regulations; ideal for EU export. Fully interchangeable with the standard model with identical performance parameters. Typical Application Scenarios Cardiopulmonary exercise testing systems (standard sensor for Schiller, Lanyi and other brands) Anesthesia ventilators, neonatal incubator oxygen monitoring Metabolic gas analyzers for exercise, breath-by-breath oxygen concentration detection Oxygen concentration monitoring for medical oxygen concentrators Operation & Calibration Guidelines Allow a 30-minute warm-up period after sensor replacement for stable signal output Standard calibration: two-point calibration using ambient air (21% O₂) and 100% pure oxygen Replace the sensor immediately if severe signal drift, excessive zero offset or calibration failure occurs, indicating depleted electrolyte Avoid long-term exposure of the membrane to condensed water or high-concentration anesthetic agents, which will accelerate sensor degradation HONEYWELL OOM109 （EnviteC） Oxygen Sensor HONEYWELL OOM109-LF2 （EnviteC） Oxygen Sensor