S415 Compact Flow Meter for Compressed Air and Nitrogen (Eco-Inline)

Reliable and highly economical compressed air flow and consumption measurement directly at the point of use.

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Compact flow meter for installation at the point-of use

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Economic flow and consumption metering at low investments

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Flow conditioner eliminates need of straight inlet

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Mobile App for remote configuration and online values

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Total Mass Flow: No bypass measurement required

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Compact design makes it easy and flexible to install

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Isolated 4... 20 mA & Pulse; Modbus/ RTU; M-Bus

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G inner thread connection: DN8, DN15, DN20, DN25 or DN32

The SUTO S415 Compact Flow Meter offers compressed air flow and consumption measurements directly at the point of use. It is designed to be seamlessly integrated into your compressed air system or in nitrogen gas applications.

Optimize Your Compressed Air and Nitrogen Systems

This highly economical flow meter will help you improve compressed air system efficiency, while helping reduce compressed air usage and operating costs. The S415 comes standard with a wireless communication interface to help the user quickly and easily check the flow meter readings or adjust the settings via the free SUTO flow meter app S4C-FS.

Various Sensor Outputs

The S415 provides various sensor outputs, such as 4 … 20 mA, Modbus/RTU and M-Bus. With the Modbus/ RTU interface, the S415 can be easily daisy-chained to a Modbus Master device such as our SUTO S331 Data Logger by using an RS-485 splitter (A554 3310) and the M8 to M12 converter cable (A553 0161). Through this method, you can add up to 16 flow meters to a single master device, making it versatile for bigger monitoring systems.

Integrated Flow Conditioner

With a highly engineered flow conditioner, there is no additional straight inlet piping needed. The innovative mechanical design reduces the pressure loss to a minimum (<30 hPa). This guarantees highly accurate measurement in difficult pipeline designs. 

Low-Cost and Broad Monitoring

The S415 flow meter is best suited to general process work where low-cost and broad monitoring of compressed air and nitrogen flow are required. Easily monitor the compressed air flow and consumption of individual machines and processes to improve efficiency and reliability.

Mobile configuration and real-time data

Various settings, such as gas type, flow unit, and reference standards, can be set in the factory according to your needs. If settings need to be changed on site, they can be done using the free S4C-FS smartphone application. This enables users to change the settings of the flow sensor wirelessly on site. Flow meter settings are well protected from unwanted access with the use of a unique QR access code for each meter. Should you have any special requests, such as custom flow ranges or different gas types, please contact us here?

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  • Compressed air and gas flow and consumption measurement at point of use
  • Monitoring of operation costs and consumption of machines and compressed air users


Accuracy3 % o.RDG ±0.3 % FS
Selectable unitsl/min, cfm, kg/h, m3/h
Measuring rangesee table on the previous page
Repeatability1 % o.RDG
SensorThermal mass flow sensor
Sampling rate3/sec
Turndown ratio50:1
Response time (t90)2 sec
Selectable unitsm³, ft3, l, kg
Reference conditions
Selectable conditions20 °C 1000 mbar (ISO1217)
0 °C 1013 mbar (DIN1343)
freely adjustable


Analog output
Signal4 ... 20 mA, isolated
Scaling0 ... max flow
Update rate3/sec
Pulse output
SignalMax 30 V, 200 mA
Scaling1 pulse per consumption unit
Voltage supply15 ... 30 VDC
Current consumption120 mA @ 24 VDC


WirelessS4C-FS App for mobile phones
Integrated4 digit LED
Process connectionAluminum alloy
HousingPC + ABS
SensorGlass coated resistive sensor
Metal partsAluminum alloy
Electrical connection2 x M8 (4 pole)
Protection classIP54
ApprovalsCE, RoHS, FCC
Process connectionG-thread
Weight0.45 ... 1.3 kg (depends on model)
Operating conditions
MediumAir, N2
Medium qualityISO 8573: 4.4.3 or better
Medium temperature0 ... 50 °C
Medium humidity< 90 % rH, no condensation
Operating pressure0 ... 10 bar(g)
Ambient temperature0 ... 50 °C
Ambient humidity< 95 % rH
Storage temperature-30 ... 70 °C
Transport temperature-30 ... 70 °C
Pipe sizesDN8, DN15, DN20, DN25, DN32


Standard range (S)2501000200035006000
Low range (L)502004007001200
Stated measuring ranges for S415 under following conditions:
Standard flow in air in l/min
Reference pressure: 1000 mbar
Reference Temperature: +20 °C
Measuring ranges in Nitrogen are different. Please contact us for details at [email protected]


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Info sheets
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S401/ S402/ S415/ S418/ S418-V/ S421/ S430/ S450/ S452/ S460 /S461 /S462 – CE & UKCA DECLARATION OF CONFORMITY

S401/ S402/ S415/ S418/ S418-V/ S421/ S430/ S450/ S452/ S460 /S461 /S462 – CE & UKCA DECLARATION OF CONFORMITY
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S4C-FS App Android: V2.0.1

S4C-FS App Android: V2.0.1
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