S402 OEM

S402 OEM Flow Meter for Compressed Air and Gases (Insertion-Sensor)

Cost-effective and economical flow meter for monitoring compressed air and gases in OEM applications.

Right Mark

Easy and effective process flow monitoring

Right Mark

Accurate Results and very fast response time

Right Mark

Highly economical and reliable flow measurement

Right Mark

Remote configuration via mobile app

Right Mark

Easy installation under pressure

Right Mark

Compact and robust design for long lifetime

Right Mark

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

Right Mark

Installation through 1/2” ball valve (up to DN500)

With the S402 OEM Flow Meter, SUTO is completing its flow meter product range by having an OEM dedicated flow meter solution. The S402 OEM is made for compressed air system and solution providers, offering an affordable and economic flow meter for compressed air and gases together with their solutions.

Thermal Mass Flow Technology

The S402 OEM Flow Meter is based on the thermal mass flow measurement principle. Thanks to the technology the sensor doesn’t require compensation with changes in the compressed air pressure and temperature. Therefore, no additional measurement installations are needed.

Moreover, the thermal mass flow sensor technology offers a high resolution and a high sampling rate, which results in a fast and precise measurement. This also makes it well suited to be used in any other gas such as Nitrogen and many other technical gases.

Private Label Options

The S402 OEM Flow Meter is customizable in terms of colors and labeling and adopts to your company design and colors. Please contact us for private customization options or further questions here.

Easy Installation

Installation can be done under pressure through a 1/2“ ball valve, without shutting down the compressed air system, thanks to the insertion type sensor. Various settings such as gas type, flow unit, reference standards, can be set ex-factory according to your needs.

Online Readings and Configuration

With wireless configuration of the flow meter, it makes it as easy as possible for on-site engineers. Not only can the sensor be configured and set up on site using the SUTO S4C-FS smartphone app, but live measurement data like the actual flow or the totalizator can also be read wirelessly on site.

Made for OEM Applications

The high-grade stainless steel 1.4404 makes this a unique product, giving you high quality and accuracy. With this still serving our OEM customers an affordable and economic solution for flow and consumption measurement in compressed air and gases.

Various Signal Outputs

The S402 OEM Flow Meter offers two different signal output options. It can be equipped with Modbus/RTU data interface or isolated 4…20 mA analog and pulse output.

Please contact us here for more information or consultation.

Read more

The S402 OEM flow sensor offers reliable flow and consumption measurements for driers and consumers. Insertion type sensor fits to all pipe sizes.


Accuracy2 % of reading ± 0.3% FS
Selectable unitsm³/h, m³/min, l/min, l/s, cfm, kg/h, kg/min, kg/s
Measuring rangesee table below
Repeatability0.25 % o.RDG
SensorThermal mass flow sensor
Sampling rate3 samples / sec
Turndown ratio1:100
Response time (t90)0.5 sec
Selectable unitsm³, ft³, l
Reference conditions
Selectable conditions20 °C 1000 mbar (ISO1217),
0 °C 1013 mbar (DIN1343)
freely adjustable


Analog output
Signal4 ... 20 mA, isolated
Scaling0 ... max flow, freely adjustable
LoadMax. 250R
Update rate1/sec
Pulse output
SignalSwitch output, normally open, max. 30 VDC, 20 mA
Scaling1 pulse per consumption unit
Voltage supply15 ... 30 VDC
Current consumption200 mA


WirelessS4C-FS App for mobile phones
Process connectionStainless steel 1.4404 (SUS 316L)
HousingPC + ABS
SensorCeramic, glass coated
Metal partsStainless steel 1.4404 (SUS 316L)
Electrical connectionA1415: M12 (6 pole)
other options: M12 (5-pole)
Protection classIP65
ApprovalsCE, RoHS, FCC
Process connectionG1/2” (ISO 228/1)
Weight0,9 kg
Operating conditions
MediumAir, N2, O2, CO2 and other gases
Medium qualityISO 8573: 4.4.3 or better
Medium temperature-30 ... +140 °C
Medium humidity< 90 % rH, no condensation
Operating pressureMax. 1.6 MPa(g)
Ambient temperature-30 ... +70 °C
Ambient humidity< 99 % rH
Storage temperature-30 ... +70 °C
Transport temperature-30 ... 70 °C
Pipe sizes½” ... 12” (bigger pipes on request)


1”DN2527.30,5 ... 1470,6 ... 294
1¼”DN3236.00,9 ... 2661,2 ... 531
1½”DN4041.91,2 ... 3661,5 ... 731
2”DN5053.12,0 ... 6002,5 ... 1197
2½”DN6568.93,5 ... 10265.0 ... 2048
3”DN8080.95,0 ... 14247,0 ... 2842
4”DN100100.010 ... 218312 ... 4357
5”DN125125.013 ... 341918 ... 6824
6”DN150150.018 ... 493025 ... 9838
8”DN200200.026 ... 878533 ... 17533
10”DN250250.040 ... 1374352 ... 27428
12”DN300300.060 ... 1981480 ... 39544
The table shows flow ranges up to 300 mm pipe diameter at standard conditions in air. Other standard conditions and gases flow ranges are available on request. In larger pipe diameters flow can also be measured.

S402 OEM

S402 OEM
Successfully Copied

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
Successfully Copied

S402 OEM

S402 OEM
Successfully Copied

S402 Firmware: V1.2

S402 Firmware: V1.2

Personal advice

Would you like to receive more information about products and applications?
Or do you need personal advice? We’re here to help!