The SUTO S220 Dew Point Sensor provides reliable and long-term stable dew point monitoring for compressed air and gases in industrial applications. The sensor has a range of -100 … +20 °C Td. This makes it an ideal choice for dew point measurements in high-tech industries and special conditions, where accordance to the compressed air quality ISO 8573-1 Standards is required.
Made in Germany. brand SUTO, model S220
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New generation of dew point sensors offers users a plug‑and‑play solution for compressed air quality monitoring in accordance with ISO 8573‑1. All sensor models are available with 2‑wire or 3‑wire 4…20 mA analog outputs; in addition, the models are available with a Modbus/RTU digital interface. Thanks to the availability of various output signals, users can achieve high flexibility and seamless integration into the process.
Furthermore, the dew point sensors are offered with an integrated pressure sensor. An optional OLED display mounted directly on the sensor displays real‑time values. The display can be easily rotated by 340° to suit any application. The main housing is made of a high‑grade aluminum alloy with a soft finish. The process connection is a stainless steel connection of grade 1.4301 (SUS 304), designed for a long service life. The top cover is made of aluminum of the same quality as the main housing. The optional display cover is made of durable polycarbonate reinforced with ABS to withstand harsh operating conditions.
The SUTO S220 sensor is the result of many years of high‑tech research and development. The sensor was specifically designed for applications at low dew points where other types of sensors fail. The combination of the QCM and a well‑known polymer sensor makes the S220 the world’s first model that provides accurate measurement across the entire range from –100 °C Td to +20 °C Td by automatically switching between the two sensing elements as needed. By additionally integrating a pressure sensor into the measuring unit, SUTO combines four sensing elements (polymer, QCM, Pt100, pressure) into a single dew point sensor.
The new generation of sensors is the successor to the well‑known SUTO dew point sensors that have satisfied users for many years. The new sensors have been redesigned from the ground up, integrating the latest technologies and all our experience, while being fully backward compatible with existing installations.
The exchange calibration service eliminates downtime and allows users to have uninterrupted recording of dew point measurements.
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 |
Features
| MEASUREMENT | |
| 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 |
| Repeatability | 0.25 % from measured value |
| Sensor | Polymer + QCM |
| Response time (t90) | 0 °C Td ➞ -80 °C Td ≤ 420 sec -80 °C Td ➞ 0 °C Td ≤ 90 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 | -20 … +70 °C |
| Ambient humidity | 0 … 100 % rH |
| Storage temperature | -20 … +50 °C |
| Transport temperature | -30 … +70 °C |
* CO₂ medium: If the S211 is used in CO₂ the range is limited to -40 °C Td 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 S211 and S220 will be used in CO₂)
| Model | Description | Price |
| S699 1220 | S220 Dew Point Transmitter (-100 … +20 °C Td), 2-Wire Analog Output | On request |
| S699 2220 | S220 Dew Point Transmitter (-100 … +20 °C Td), 3-Wire Analog + SDI Output | On request |
| S699 3220 | S220 Dew Point Transmitter (-100 … +20 °C Td), 3-Wire Analog + Modbus/RTU Output | On request |
| S699 4220 | S220 Dew Point Transmitter (-100 … +20 °C Td), integrated Pressure sensor 0 … 1.6 Mpa | On request |
| A1380 | Option: Operating Pressure 0 … 1.6 MPa (Standard) | On request |
| A1387 | Option: OLED Display Option, for 3-wire Analog version (only for S699 2xxx) | On request |
| A1388 | Option: OLED Display Option, for 3-wire Analog & Modbus version (only for S699 3xxx & S699 4xxx) | On request |
| A1389 | Option: Without Display (Standard) | On request |
You can request the necessary certificates, documentation, instructions and user guide for SUTO S220 using the special form.
You can buy SUTO S220 in Latvia at a price starting from price by request € in «OLIL SIA» by leaving a request on the website, by phone +371 672 70580 or by email olil@olil.lv. SUTO S220 price are subject to change depending on exchange rates. We deliver instruments by transport companies in Latvia, Estonia and Lithuania. Worldwide shipping to Europe, Asia, Africa, North and South America available on request.
See also: Dew point meters for compressed air