The IFM SA4320 is a thermal flow sensor designed for monitoring air and gas flow in ducts and pipes. It features a 200 mm probe and provides configurable switching, analogue, frequency, and IO-Link signals. The sensor supports gas velocity measurement up to 30 m/s in absolute mode and up to 60 m/s in relative mode. Its integrated temperature measurement adds additional process information. The SA4320 is well suited to exhaust-air monitoring, ventilation, extraction, and industrial air-flow applications.
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The SA4320 uses calorimetric measurement for air and gas-flow monitoring. Its long 200 mm probe allows installation into ducts and larger pipe sections. The sensor can operate in relative or absolute gas-flow modes. Relative mode provides a setting range up to 60 m/s. This gives the sensor flexibility for different ventilation and extraction applications.
The SA4320 provides two digital outputs and one analogue output. Switching, analogue, frequency, and IO-Link signals can be configured according to the automation requirement. The analogue output provides a scalable 4…20 mA signal. Frequency output can operate up to 1000 Hz. This enables direct integration into PLC, building-management, and industrial control systems.
The sensor also monitors temperature, with a measurement range of -20…90 °C according to the detailed operating specification. The temperature information can be used for process monitoring alongside flow velocity. This reduces the need for a separate temperature sensor in suitable installations. The integrated display provides local information. IO-Link adds digital access to measurement and configuration data.
Calorimetric flow measurement
200 mm probe
Air and gas monitoring
Relative flow mode
Absolute flow mode
Flow range up to 60 m/s
Two digital outputs
One analogue output
4…20 mA
Frequency output
IO-Link
Integrated temperature monitoring
18…30 V DC
M12 connection
Exhaust-air monitoring
Ventilation systems
Air extraction
Industrial ducts
Dust extraction
Machine ventilation
Compressed-air monitoring
Factory environmental monitoring
The SA4320 provides configurable flow monitoring for different gas-flow conditions. The long probe allows the sensor to reach deeper into ducts and pipes. Relative and absolute operating modes provide flexibility when reference conditions are important. The analogue output can transmit a proportional flow signal to a controller. This makes the sensor suitable for continuous airflow monitoring.
Install the SA4320 through a suitable compression fitting that allows the probe to be positioned correctly in the duct. Follow the specified insertion depth and flow-direction requirements. Avoid placing the sensor immediately downstream of strong turbulence or flow disturbances. Verify the configured flow range during commissioning. Inspect the probe and electrical connection periodically for contamination or mechanical damage.
| Specification | Details |
|---|---|
| Model | SA4320 |
| Product type | Flow sensor |
| Measuring principle | Calorimetric |
| Order code | SAEXXXXBFRKG/US-100 |
| Primary medium | Gases |
| Probe length | 200 mm |
| Operating mode | Relative / absolute |
| Absolute gas range | 0…30 m/s |
| Absolute sensitivity | 0.6…30 m/s |
| Relative gas range | 0…60 m/s |
| Relative sensitivity | 0.6…30 m/s |
| Display range | 0…36 m/s |
| Resolution | 0.2 m/s |
| Set point | 2…30 m/s |
| Reset point | 0.6…28.6 m/s |
| Analogue start point | 0…24 m/s |
| Analogue end point | 6…30 m/s |
| Frequency end point | 6.6…30 m/s |
| Frequency output | 100…1000 Hz |
| Digital outputs | 2 |
| Analogue outputs | 1 |
| Analogue signal | 4…20 mA |
| Max. analogue load | 350 Ω |
| Output design | PNP/NPN |
| Switching function | NO/NC configurable |
| Supply voltage | 18…30 V DC |
| Current consumption | <100 mA |
| Protection class | III |
| Reverse polarity | Yes |
| Power-on delay | 10 s |
| Temperature monitoring | Integrated |
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