SENSIRION SFM3003-C Gas Flow Sensors Instruction Manual

: August 17, 2024
: SENSIRION

Table of Contents

SENSIRION SFM3003-C Gas Flow Sensors Instruction
Product Information
Product Usage Instructions
Selection guide for Sensirion gas flow sensors
Inspiratory flow sensors
Proximal flow sensors
Expiratory flow sensors
Read User Manual Online (PDF format)
Download This Manual (PDF format)

SENSIRION SFM3003-C Gas Flow Sensors Instruction

SENSIRION-SFM3003-C-Gas-Flow-Sensors-Instruction-product-
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Specifications:

Form factor: Medical cones 22mm (ISO5356)
Supply voltage: 3.3V (2.7 – 5.5V) or 5V

Product Information

Sensirion offers a range of gas flow sensors optimized for medical applications. The SFM product line is engineered for medical ventilation and is categorized into three families based on sensor position: Inspiratory, Expiratory, and Proximal. Each family addresses specific flow monitoring requirements.

Inspiratory Flow Sensors:
The Inspiratory flow sensors are designed for accurate measurements at higher flows and are available in various models such as SFM3003-CL, SFM3003-CE, SFM3013-CL, and more.
Proximal Flow Sensors:
These sensors are suitable for applications where gage pressure needs to be monitored and are compatible with a supply voltage of 3.3V or 5V.
Expiratory Flow Sensors:
The SFM3200-AW sensor is specifically designed for the expiratory position with features like minimized pressure drop, washability, a heater, and the ability to measure vapor-saturated gas/air

Product Usage Instructions

Inspiratory Flow Sensors:

If you have multiple sensor options, evaluate them in your device to account for specific device design influences on measurement.
Ensure non-condensing operating conditions for accurate readings.

Proximal Flow Sensors:

Monitor gage pressure accurately to maintain optimal performance.
Operate within the recommended supply voltage range for reliable measurements.

Expiratory Flow Sensors:

Clean the sensor to prevent contamination and condensation buildup.
Utilize the sensor in expiratory positions for best results.

FAQ :

Q: Can I clean the Inspiratory flow sensors?
A: No, the Inspiratory flow sensors are not designed to be cleaned or disinfected and should be used under non-condensing conditions.

Selection guide for Sensirion gas flow sensors

Finding the right flow sensor (SFM) for your medical ventilation or high flow device.
Our flow sensor portfolio offers a comprehensive range of gas flow sensors optimized for medical applications. The SFM product range is specifically engineered for medical ventilation, addresses all relevant flow monitoring requirements and is organized in three families, depending on the position of the sensor in the ventilation system:
1. Inspiratory
2. Expiratory
3. Proximal
The figure below provides a first guideline to select a suitable sensor depending on the beforementioned position in the application. $SENSIRION-SFM3003-C-Gas-Flow-Sensors-Instruction- $1$$
In addition, some sensors offer unique features and characteristics that may be considered during sensor selection. These features are summarized in the following while the table on page 4-6 provides a comprehensive overview.

Inspiratory flow sensors

Our inspiratory flow sensors are typically used inside the ventilator to measure the individual air/O2/heliox gas lines as well as the total flow of the mixed gas before delivery to the patient.

Selection based on operating gage pressure1
- 1bar → SFM4300 (or SFM4200 for flows > 50slm)
- 150mbar → SFM3013
Lower operating pressure: all other sensors (SFM3003 family, SFM3100, SFM3119 and SFM3200).
Consider the following criteria according to your requirements to identify the most suitable sensor in the table on page 4:
- Form factor and size
- Mechanical connection
- Measured gases
- Flow range and range of best performance (low or high flows)
- Analog or digital output
- Special features like gas NTC temperature sensor etc.

If you identify more than one sensor option, it is recommended to evaluate the sensor(s) in your device as the specific device design can influence the measurement.

Proximal flow sensors

Gas flow sensors specifically designed to monitor flow in close proximity to the patient, where the following main challenges have been resolved by our portfolio:

High humidity and condensation
All our proximal sensors are capable to measure saturated gas/air and feature a heater to prevent condensation at the sensor’s chip, therefore ensuring continued accuracy.
Contamination
We offer both single-use and washable sensors.
Sensor handling by medical personnel
All our proximal sensors feature a mechanical interface allowing a clip-on connection, easy to disconnect and reconnect.
Inspiration and expiration flow
All our proximal sensors allow bi-directional flow sensing.
Individual sensor packaging for single-use sensors
Individual sensors are protected against contamination from their production until their use by caregivers. Quality control is improved, supply chain management is simplified, and a customized label brings all needed information to the users.

The selection of the right sensor is based on two main criteria

Patient group: neonates or adults/pediatric
Use in clinical setting: single use/disposable or washable

1 Gage pressure describes the pressure difference between the gas pressure in the tubes / flow sensor and the ambient pressure © Copyright Sensirion AG, Switzerland 2/7

Expiratory flow sensors

SFM3200-AW has been specifically designed for the expiratory position with a minimized pressure drop, washability, a heater and the capability to measure vapor-saturated gas/air.
Alternative options

Proximal sensors can be used further from the patient in expiratory position, in case a disposable option is preferred.
Inspiratory sensors can be placed in the expiratory position if measures are taken against contamination (like HMF filters) and condensation (water traps). Inspiratory sensors are not designed to be cleaned or disinfected and require non-condensing operating conditions.

Form factor| Sensor| Measured gases| Flow range [slm]| Pressure drop @flow[slm]| Typ. accuracy [%m.v.] @flow[slm]| Recommended supply voltage (allowed)| Special features
---|---|---|---|---|---|---|---
Inspiratory flow sensors
Medical cones 22mm (ISO5356)| SFM3003-CL

__

| | -30 to +300| @60: 80Pa @200: 500Pa| @200: ±2%| 3.3V (2.7 – 5.5V)| Low pressure drop
This form factor usually gives better accuracy at| SFM3003-CE| | – 150 to +300| @60: 100Pa @200: 600Pa| @200: ±2.5%| 3.3V (2.7 – 5.5V)| Extended negative flow range
higher flows| SFM3003-CET| | – 150 to +300| @60: 100Pa

@200: 600Pa

| @200: ±2.5%| 3.3V

(2.7 – 5.5V)

|

Extended negative flow range
NTC temperature sensor in gas path

| __|

Air
O2
Air/O2 mixtures

| |
| SFM3013-CL| -30 to +300| @60: 80Pa @200: 500Pa| @200: ±2%| 3.3V (2.7 – 5.5V)|

Low pressure drop
Higher pressure resistance up to 1bar gauge

| SFM3013-CLM| |

Air/O2: -30 to +300
HeliOx : -30 to +200

| @60: 80Pa @200: 500Pa| @200: ±2%

Heliox: ±4.5%

| 3.3V (2.7 – 5.5V)|

Higher pressure resistance up to 1bar gauge
Additional HeliOx calibration

| SFM3019| | -10 to +240| @60: 80Pa @200: 500Pa| @200: ±2%| 3.3V (2.7 – 5.5V)| See successor SFM3003-300-CL
| SFM3020| · Air

· O2

· Air/O2 mixtures formula provided

| -10 to +160| @60: 80Pa @200: 500Pa| @160: ±2%| 5V| Analog output 0.5 – 4.5V
| SFM3200| · Air

· O2

· Air/O2 mixtures formula provided

| -100 to +250| @60: 100Pa @200: 750Pa| @100: ±3%| 5V| See successor SFM3003-CL or CE
Form factor| Sensor| Measured gases| Flow range [slm]| Pressure drop @flow[slm]| Typ. accuracy [%m.v.], @flow[slm]| Recommended supply voltage (allowed)| Special features
---|---|---|---|---|---|---|---
Compact| SFM3100-VC|

Air
O2
Air/O2 mixtures formula provided

| -24 to +240| @60: 300Pa| @60: 2.5%| 5V| NTC temperature sensor in gas path
T his form factor usually gives better accuracy at| | | @200: 1600Pa| | (4.75 – 5.25V)|

Analog output 0.095 – 2.45V
See successor SFM3119 (digital)

low flows/smaller offse t| | | | | |
| SFM3119| Air| -10 to +240| @60: 200Pa| @100: 2%| 3.3V| Digital output
| O2| | @200: 1600Pa| | (2.7 – 5.5V)|
| Air/ O2 mixtures| | | | |
| SFM4200|

Air
O2
Air/O2 mixtures formula provided

| 0 to 160| @60: 2000Pa @160: 9000Pa| @80: 2.5%| 5V|

Air, O2
Down-mount only
Operating pressures up to 8 bar

O-ring / Push-in Legris / Down-mount| | | |
| SFM4300| Air| 0 to 20| @20: 2500Pa| @20: 2%| 3.3V|

Air, O2, CO 2 , N 2 O and mixtures up to 20slm
Air, O2 and mixtures up to 50slm
High resolution 0.4sccm for 20slm ranges
Operating pressures up to 7 bar

| O2| 0 to 50| @50: 10000Pa| @50: 4%| (3.0 – 5.5V)
| CO2| | | |
| N2O| | | |
| Mixtures| | | |
Form factor| Sensor| Measured gases| Flow range [slm]|

Pressure drop @flow[slm]

| Typ. accuracy [%m.v.] @flow[slm]| Recommended supply voltage (allowed)| Special features
---|---|---|---|---|---|---|---
Expiratory flow sensors
Medical cones 22mm (ISO5356-1)

| SFM3200-AW|