S211

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.

Accurate Dew point readings after desiccant dryers

Precise measurement with ± 2 °C Td accuracy

Integrated optional display for on-site values

Flexible installation thanks to the compact design

Integrated optional pressure sensor

Compressed air quality monitoring of humidity

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

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

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Dew Point Calculator

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.

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

MEASUREMENT
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
Repeatability	0.25 % from measured value
Sensor	Polymer
Response time (t90)	0 °C Td ➞ -60 °C Td ≤ 280 sec -60 °C Td ➞ 0 °C Td ≤ 65 sec @ 4 l/min
Pressure
Accuracy	0.5 % FS
Measuring range	0 ... 1.6 MPa
Sensor	Piezo resistive type
Temperature
Accuracy	+/- 0.3 °C
Measuring range	-30 ... +70 °C
Sensor	Pt100
Reference conditions
Selectable conditions	20 °C 1000 mbar (ISO1217), 0 °C 1013 mbar (DIN1343) Freely adjustable

SIGNAL INTERFACE & SUPPLY
Analog output
Signal	4 ... 20 mA 2-wire or 4 ... 20 mA 3-wire
Scaling	4 mA = -60; 20 mA = +20 °C Td; freely adjustable
Load	250R
Update rate	3/sec
Fieldbus
Protocol	Modbus/RTU
Update rate	1/sec
Supply
Voltage supply	15 ... 30 VDC
Current consumption	2-wire: 4 ... 20 mA 3-wire: 40 mA @ 24 VDC 3-wire with Display: 50 mA @ 24 VDC

GENERAL DATA
Configuration
PC Software	S4C-DP Application
Display (Optional)
Integrated	0.66” OLED display, indicates the measured value and unit
Material
Process connection	Stainless steel 1.4301 (SUS 304)
Housing	Display cover: PC + ABS
Sensor	Polymer + Quartz-Crystal
Metal parts	Sinter filter (stainless steel)
Miscellaneous
Electrical connection	M12, 5-pole
Protection class	IP65
Approvals	CE
Process connection	G 1/2” (ISO 228/1)
Weight	180 g
Operating conditions
Medium	Air, Argon, O₂, N₂, CO₂
Medium quality	ISO 8573-1: 4.6.3 or better
Medium temperature	-30 ... +70 °C
Medium humidity	≤ 20 °C Td
Operating pressure	0.1 ... 1.6 MPa
Ambient temperature	0 ... +50 °C
Ambient humidity	0 ... 100 % rH
Storage temperature	-20 ... +50 °C
Transport temperature	-30 ... +70 °C