S211 Dew Point Sensor for Desiccant Dryers (-60… +20 °C Td)

Ideal dew point sensor to monitor desiccant dryers with a range of -60 … +20 °C Td.

Right Mark

Accurate Dew point readings after desiccant dryers

Right Mark

Precise measurement with ± 2 °C Td accuracy

Right Mark

Integrated optional display for on-site values

Right Mark

Flexible installation thanks to the compact design

Right Mark

Integrated optional pressure sensor

Right Mark

Compressed air quality monitoring of humidity

Right Mark

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

Right Mark

Operating pressure of 0 ... 1.6 MPa (Optional 35.0 MPa)

The SUTO S211 Compact Dew Point Sensor provides an affordable and reliable dew point monitoring solution for industrial applications in accordance to ISO 8573-1. It’s compact design and great features makes it the perfect choice for dew point measurements in desiccant dryers.

Redesigned for our customers’ needs

The new SUTO Dew Point Sensors have been redesigned from ground up, integrating the latest technology and all our experience. The sensors are fully backwards compatible to existing compressed air and gas installations.

Dew Point, Pressure and Temperature

The sensor is equipped with an integrated pressure sensor, combining dew point, temperature and pressure monitoring into a single instrument.

User-friendly Outputs

The S211 Dew Point Sensor is perfectly suited to be integrated into process controls or high-level monitoring systems. Various output options are offered for a seamless integration: 4 … 20 mA 2-wire + SDI; 4 … 20 mA 3-wire + SDI; 4 … 20 mA 3-wire +; Modbus/ RTU. The S211 is easily connected to the SUTO S330/331 Displays / Data Logger as well as the SUTO Portable Data Logger S551.

Optional OLED Display

The optional OLED display directly mounted on the S211 provides real-time values on-site. The display can be easily rotated by 340 ° to adjust to any application.

Long Lasting Materials

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

Dew Point Sensor Series Comparison
Model S211 S215 S220
Dew point -60 … +20 °C Td -20 … +50 °C Td -100 … +20 °C Td
Temperature -30 … +70 °C -30 … +70 °C -30 … +70 °C
Pressure 0 … 1.6 MPa 0 … 1.6 MPa 0 … 1.6 MPa
Application In desiccant dryers In fridge dryers In high-tech applications
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 against the calibrated one and returned to the supplier. More information about the SUTO Exchange Service can be found here.

Please contact us here for consultation or special requests, such as custom dew point ranges or different gas types.

Read more

Dew point measurement in desiccant dryer applications where dew points down to -60 °C Td must be measured


Dew Point
Accuracy± 1 °C Td (0 ... 20 °C Td)
± 2 °C Td (-60 ... 0 °C Td)
Selectable units°C, °F, bar(g), MPa(g), psi(g), % rH, g/m³,
mg/m³, g/m³ atm., mg/m³
Measuring range-60 ... +20 °C Td
Repeatability0.25 % from measured value
Response time (t90)0 °C Td ➞ -60 °C Td ≤ 280 sec
-60 °C Td ➞ 0 °C Td ≤ 65 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 conditions20 °C 1000 mbar (ISO1217), 0 °C 1013 mbar (DIN1343) Freely adjustable


Analog output
Signal4 ... 20 mA 2-wire or
4 ... 20 mA 3-wire
Scaling4 mA = -60; 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)
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

S211 / S215 / S220

S211 / S215 / S220
Successfully Copied

S211 / S215 / S220

Info sheets
S211 / S215 / S220
Successfully Copied

S201/ S211/ S212/ S215/ S217/ S220/ S230/ S231/ S305/ S505/ S520 – CE & UKCA DECLARATION OF CONFORMITY

S201/ S211/ S212/ S215/ S217/ S220/ S230/ S231/ S305/ S505/ S520 – CE & UKCA DECLARATION OF CONFORMITY
Successfully Copied

S4C-DP S2XX Service Software: V1.4

S4C-DP S2XX Service Software: V1.4
Successfully Copied

Personal advice

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