S215

S215 Dew Point Sensor for Fridge Dryers (-20… +50 °C Td)

Long term-stable dew point measurement in fridge dryer applications, with a range of -20 … +50 °C Td.

Reliable dew point monitoring after fridge dryers

Low maintenance costs due to stable measurements

Pressure sensor integrated as option for

Compact display for live readings at the sensor

Compressed air quality monitoring of humidity

Flexible installation due to the compact design

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 S215 Dew Point Sensor provides reliable dew point monitoring in industrial applications, with long-term stability and high accuracy over the full range of -20 … +50 °C Td. Along with its compact design, this makes it the ideal solution for compressed air and gas dew point measurements in refrigeration dryers.

Dew Point Monitoring According to ISO 8573-1

The plug-and-play dew point solution monitors the compressed air quality and purity according to the ISO 8573-1 standard. Meeting these requirements helps ensure fridge-dryer efficiency and reliability.

Output Signals for Great Flexibility

The dew point transmitter is available with 2-wire or 3-wire analog 4… 20 mA output signals, as well as Modbus/RTU digital interface. By offering various output signals, the sensor can be integrated seamlessly into any process.

Modbus Sensor Network with S331

The Modbus/RTU bus allows connecting several devices to a single bus line via Daisy-Chain. For example, up to 16 devices to a STUO Data Logger S331. The S331 is a powerful yet cost-efficient data logger and display solution.

Pressure Sensor and OLED Display

The S215 is offered with an integrated pressure sensor, combining a pressure and dew point sensor into a single instrument. The optional OLED display directly mounted on the sensor provides real-time values at the point of use. The display can be rotated by 340 ° to fit in any application. (Not available with 2-wire option)

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 SUTO 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 to the calibrated one and returned to the supplier. Find more information about our SUTO Exchange Service. Please contact us for special requests, such as custom dew point ranges or different gas types or applications.

Fridge drier applications where dew points in the range of -20… +50 °C Td must be measured

MEASUREMENT
Dew Point
Accuracy	± 1 °C Td (0 ... 50 °C Td) ± 2 °C Td (-20 ... 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	-20 ... +50 °C Td
Repeatability	0.25 % from measured value
Sensor	Polymer
Response time (t90)	0 °C Td ➞ -20 °C Td ≤ 50 sec -20 °C Td ➞ 0 °C Td ≤ 35 sec @ 4 l/min
Pressure
Accuracy	0.5 % FS
Measuring range	0 ... 1.6 MPa
Sensor	Piezo-resistiv
Temperature
Accuracy	+/- 0.3 °C
Measuring range	-30 ... +70 °C
Sensor	Pt100
Reference conditions
Wählbare Bedingungen	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