Ultrasonic

OCS-3F260Ultrasonic Oxygen Sensor

Name: OCS-3F260 Ultrasonic Oxygen Sensor
Brand: Winpower
SKU: OCS-3F260

Ventilator / HFNC High Flow Therapy

Precision ultrasonic oxygen sensor for next-generation ventilators, HFNC and PSA oxygen concentrators. Measures O₂ concentration (0–100%) and flow up to 260 L/min with ±3%FS accuracy; built-in humidity and ambient pressure compensation; UART digital output.

0–100% O₂ range High-flow optimized ±3% accuracy Fast response time UART output

Download Datasheet Request UART Protocol

Product Introduction

OCS-3F260 is a multi-functional oxygen sensor developed on the basis of the ultrasonic principle, with built-in humidity and ambient pressure compensation, which can be used for the detection of air and oxygen mixture in ventilators, HFNC high-flow therapy and PSA oxygen concentrators. It measures oxygen concentration from 0% to 100% and gas flow up to 260 L/min, with ±3%FS accuracy and built-in environmental pressure compensation to adapt to environmental altitude. The sensor features high precision, no zero drift, good consistency, high stability, and long life. The detection result is output by UART digital output.

Features

Full-range oxygen measurement — 0–100% O₂ with 21–95.6% PSA range at ±3%FS accuracy
High-flow capability — up to 260 L/min flow range for large-scale and ventilator systems
Environmental compensation — built-in temperature, humidity and ambient pressure (70–110 kPa) adaptation
No zero drift — stable ultrasonic measurement with no periodic recalibration
Factory calibrated — ready for immediate deployment, 5+ year service life
Fast sampling — testing period >100ms with 10s warm-up to basic accuracy
Wide supply range — DC 5–12V operation for flexible integration

Applications

Molecular sieve oxygen generator

HFNC oxygen concentration detection

Space oxygen concentration detection

PSA oxygen generator mixed air detection

High-flow industrial oxygen monitoring (up to 260 L/min)

Central oxygen supply system verification

Precautions for Use

Ensure that the detected gas is free of water, oil and dust.
Do not disassemble the sensor without the permission of the manufacturer.
This sensor and data manual may be changed due to product technical improvement without prior notice.
The company has the final right to interpret the sensor data manual.
If there are other special customization requirements, please consult 86-0755-82415317 or phc@winpower.com.cn.

Technical Specifications

O₂ Concentration Range	0% – 100% (PSA: 21% – 95.6%)
Concentration Resolution	0.1%
Concentration Accuracy	±3%FS @5–55°C
Gas Flow Range	0–260 L/min
Flow Resolution	0.1 L/min
Flow Accuracy (<20 L/min)	±0.5 L/min @5–55°C
Flow Accuracy (>20 L/min)	±3%FS @5–55°C
Sample Gas Requirements	Dry (no condensation); Dust filtration (<1μm)
Testing Periodic Time	>100ms
Warm-up Time	Works as soon as power on; 10s to reach basic accuracy
Digital Output	9600bps UART 3.3V TTL
Inlet and Outlet Direction	Follow the direction indicated by the arrow
Working Temperature	5°C – 55°C
Storage Temperature	-5°C – 65°C
Relative Humidity	5% – 85%RH
Working Power	DC 5V–12V, 50mA
Environmental Pressure	70–110 kPa
Dimensions	8cm × 4.5cm × 3cm
Weight	23g
Withstand Pressure	0–150 kPa (pipeline pressure affects flow accuracy; flow reading will be low)

Connectors

Connector Overview

Connector	Name / Function	Description
J2	Socket (4P × 2.0mm)	Digital signal output connector for UART communication and power

Table 1: Digital signal output connector J2

Pin	Function
Pin 1	Power input (V+)
Pin 2	RXD (UART Receive)
Pin 3	TXD (UART Transmit)
Pin 4	GND (Ground)

Dimensions

8cm × 4.5cm × 3cm (L × W × H). Unit: mm, tolerance ±0.2mm.

Packaging

Inner Box

Dimensions: 42 × 30 × 24 cm
Capacity: 30PCS/layer × 5 layers = 150PCS

Shipping Carton

Dimensions: 50 × 32 × 44 cm
Contains: 2 inner boxes (150 × 2 = 300PCS)
Net weight: 5KG
Gross weight: 7.2KG

UART Communication Protocol

The UART communication protocol and integration guide for OCS-3F260 is available upon request. Please contact our engineering team for the complete technical documentation.

For inquiries: Request Quote | Technical Support