S220 OEM

S220 OEM Dew Point Sensor for Compressed Air and Gases

Dew Point Sensor offers a wide measurement range of -100 … +20 °C Td for high-tech OEM applications.

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High-performance dew point monitoring at the point-of-use

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Precise Measurement with a accuracy of ± 2 °C Td

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Compact Design to fit into the various application

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Compressed air quality monitoring of humidity

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Dual sensor system for highest precision (QCM + Polymer)

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For high-tech applications, -100 ... 20 °C Td

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4 ... 20 mA 2-wire / 3-wire and Modbus/RTU

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Measured gases: Air, Argon, O2, N2, CO2

The SUTO S220 OEM Dew Point Sensor is a reliable dew point monitoring solution for OEM applications giving you long-term, stable monitoring. By providing a range of -100 … +20 °C Td, makes it an ideal choice for dew point measurements in high-tech conditions, according to the compressed air quality ISO 8573-1 Standard.

Thanks to the reliable and long-term stable measurements, the S220 OEM reduces the maintenance cost by increasing time between calibration intervals.

Plug and Play Dew Point Monitoring

With this generation of the dew point sensors, SUTO is offering OEM customers a plug & play solution to monitor compressed air. Redesigned from ground up and integrating the latest technology and all our experience, the S220 OEM stands out from any competition.

Unique Triple Sensor

The combination of our highly engineered QCM sensor and the well-known Polymer sensor makes the S220 OEM the first dew point sensor model on the market to measure accurate over the whole range, from -100 °C Td up to +20 °C Td. By fitting an additional pressure sensor into the measurement device, SUTO is combining 3 sensor elements (Polymer, QCM, pressure) into one dew point transmitter.

Various Output Connections

The S220 OEM Dew Point Sensor is available with 2-wire or 3-wire analog 4… 20 mA output signals, in addition to that the models are available with a Modbus/RTU digital interface.

Optional Display

The optional OLED display directly mounted on the sensor provides on-site, real-time values. The display can be easily rotated by 340 ° to fit any application. The displays cover is made from robust Polycarbonate with ABS reinforcement to withstand harsh environments.

Long-term Stable Measurements

The main body is made from high class aluminum alloy with a soft finish. The process connection is a 1.4301 (SUS 304) stainless steel connection, made to last forever. Top cover made from aluminum at the same quality as the main body.

SUTO Exchange Service

The exchange calibration service eliminates downtime and enables users to have a seamless record of their dew point measurements.

The user receives a calibrated instrument in advance with a calibration certificate and the same instrument settings. The onsite instrument is then switched with the calibrated one and returned to the supplier. Please find more information about our Exchange Service here.

Please contact us here for further consultation or special requests.

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The S220 OEM dew point sensor offers a wide measurement range of -100 … +20 °C Td, relying on innovative sensor elements for high-tech applications.


Dew Point
Accuracy± 1 °C Td (0 ... 20 °C Td)
± 2 °C Td (-60 ... 0 °C Td)
± 3 °C (-100 ... -60 °C Td)
Selectable units°C, °F, bar(g), MPa(g), psi(g), % rH, g/m³,
mg/m³, g/m³ atm., mg/m³
Measuring range-100 ... +20 °C Td
SensorPolymer + QCM
Response time (t90)0 °C Td ➞ -80 °C Td ≤ 420 sec
-80 °C Td ➞ 0 °C Td ≤ 90 sec
@ 4 l/min
Accuracy0.5 % FS
Measuring range0 ... 1.6 MPa
SensorPiezo resistive type
Accuracy± 0.3 °C
Measuring range-30 ... +70 °C
Reference conditions
Selectable conditionsPressure Dew Point, Atmospheric
Dew Point


Analog output
Signal4 ... 20 mA 2-wire + SDI,
4 ... 20 mA 3-wire + Modbus/RTU
Scaling4 mA = -100; 20 mA = +20 °C Td;
freely adjustable
Update rate3 / sec
Update rate1/sec
Voltage supply15 ... 30 VDC
Current consumption2-wire: 4 ... 20 mA
3-wire: 40 mA @ 24 VDC
3-wire with Display: 50 mA @ 24 VDC


PC SoftwareS4C-DP Application
Display (Optional)
Integrated0.66” OLED display, indicates the measured value and unit
Process connectionStainless steel 1.4301 (SUS 304)
HousingDisplay cover: PC + ABS
SensorPolymer + Quartz-Crystal
Metal partsSinter filter (stainless steel)
Electrical connectionM12, 5-pole
Protection classIP65
Process connectionG 1/2” (ISO 228/1) or UNF 5/8" (ANSI B1.1)
Weight180 g
Operating conditions
MediumAir, Argon, O₂, N₂, CO₂*
Medium qualityISO 8573-1: 4.6.3 or better
Medium temperature-30 ... +70 °C
Medium humidity≤ 20 °C Td
Operating pressure0.1 ... 1.6 MPa
Ambient temperature0 ... +50 °C
Ambient humidity0 ... 100 % rH
Storage temperature-20 ... +50 °C
Transport temperature-30 ... +70 °C
*CO₂ medium:
The S220 must be set to CO₂ ex works or by using the S4C-DP Service Software + Service Kit (please state at the order if S220 will be used in CO₂)


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