Product Description:

YJJ DM-OFC-B3 Ultrasonic Oxygen Concentration Flow Sensor TOF O2 Module With Enhanced EMC

Features:

DM-OFC-B3 Ultrasonic Oxygen Concentration Flow Sensor

Parameter Description

Model: DM-OFC-B3, TOF ultrasonic flight time difference method, the top configuration version of the DM-OFC series, **temperature and pressure dual compensation + enhanced EMC anti-interference**, compatible with ultra-high flow medical ventilators and HFNC high-flow oxygen therapy equipment; only for O₂/N₂ binary mixed gas

Basic Information

- Model: DM-OFC-B3

- Detection principle: TOF ultrasonic flight time

- Measuring medium: Oxygen + Nitrogen binary mixture gas (PSA oxygen production / ventilator output gas)

- Applications: Medical ventilators, HFNC high-flow oxygen therapy devices, large-flow industrial oxygen generation units; simultaneous online monitoring of oxygen purity + gas flow, ODM complete machine integration, replacement of old equipment sensors

- Version positioning: B0 basic version → B1 enhanced version → B2 with pressure compensation → **B3 flagship model, upgraded EMC, stronger anti-electromagnetic interference, suitable for medical equipment**

Core measurement parameters

- O₂ concentration range: **20.5% ~ 95.6% VOL**

- Concentration resolution: 0.1% VOL

- Concentration accuracy: ±1.2% FS (5~50℃, temperature and pressure dual compensation)

- Flow range: **0 ~ 30 L/min**

- Flow resolution: 0.1 L/min

- Flow accuracy: ±0.2 L/min

- Response time T90: ≤0.8s

- Preheating: Power-on rapid startup, reaches full accuracy within 2 minutes

Electrical parameters

- Supply voltage: DC 5V ~ 12V (typical DC12V)

- Average working current: ≤50mA

- Communication output: UART TTL 3.3V (9600 baud rate), optional RS485

- Built-in: **Dual temperature + pressure compensation algorithm + enhanced EMC electromagnetic compatibility**, stable measurement in the presence of motor and switching power supply interference

Environmental conditions

- Working temperature: 5℃ ~ 50℃

- Working humidity: 5~85% RH, **no condensation**

- Maximum tolerance pressure: 180kPa

- Sample gas requirements: Pre-filtering and dehumidification, no liquid water, dust, CO₂/VOC and other impurity gases

- Service life: ≥10 years, no electrochemical consumable elements, long-term free from frequent calibration

Physical specifications

- Dimensions: 120.5 × 22 × 22 mm

- Weight: 25g

- Gas path: Straight-through gas path, extremely low pressure loss, no direction restrictions for inlet and outlet gas, convenient for pipeline integration

Product selling points

1. TOF ultrasonic technology, **simultaneous collection of oxygen purity + flow rate parameters**, single module replaces 2 sensors

2. Temperature and pressure dual compensation + enhanced EMC, anti-electromagnetic interference, suitable for complex electromagnetic conditions of medical equipment

3. Flow rate upper limit increased to 30L/min, suitable for ventilators, large-flow HFNC high-flow oxygen therapy equipment

4. No consumable elements, long service life, reducing later calibration and maintenance costs

5. UART digital serial output, convenient for embedded motherboard connection, supporting ODM development and maintenance replacement for medical equipment

Specifications: