S305 Dew Point Monitor

Dew Point Monitor with Alarm (–50 … 20 °C Td / –20 … +50 °C Td)

Two measuring ranges available: –50 … +20 °C Td and –20 … +50 °C Td
Accuracy of ±2 °C Td
Plug & Play solution, ready to install
6 mm quick connection for compressed air
LCD display with value and alarm indication
Programmable pre-alarm and main alarm (2 relays)
4…20 mA output for PLC or SCADA systems
Industrial IP65 housing, suitable for wall or panel mounting

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Description

Maintain full control of the dew point in your compressed air system.

The S305 is a dew point monitor designed for continuous supervision of refrigerated dryers and compressed air treatment systems. Its precise measurement allows deviations to be detected before moisture causes costly operational consequences.

An inadequate drying level can lead to:
- Corrosion in piping and equipment
- Failures in pneumatic valves and cylinders
- Defects in painting processes
- Downtime and micro-stoppages that affect productivity
The S305 integrates display, alarms, and analog outputs into one compact unit, activating visual alerts and relays when the dew point exceeds the configured limits. This enables immediate action to protect both process quality and system integrity.

A practical, reliable, and ready-to-install solution to ensure dry and stable compressed air at all times.

Applications

Dew point monitoring in refrigerated dryers

Supervision in desiccant dryers

Quality control in painting and coating lines

Protection of pneumatic systems (valves, cylinders, actuators)

Compressed air systems in automotive, food, pharmaceutical, and general manufacturing industries

Installation in compressor rooms or critical points of the air network

Integration into PLC, SCADA, or centralized monitoring systems

Advantages

Continuous and reliable dew point measurement

Early detection of dryer failures

Reduces risks of corrosion and equipment damage

Prevents unplanned downtime and production losses

Configurable alarms with integrated relays

4…20 mA output for easy integration into industrial control systems

Compact and easy-to-install equipment (Plug & Play)

Low maintenance

High stability and repeatability in measurement

Robust housing for industrial environments

suto itec s305 dew point monitor for desiccant and fridge dryers min 4 Airtec Global

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Operational and Technical Specifications

The S305 has been designed to provide stability and reliability under real industrial conditions, ensuring accurate measurements when the recommended operating parameters are observed.

Operating conditions:

Working pressure: 0.3 … 1.5 MPa (up to 15 bar depending on model)

Medium temperature: –30 … +70 °C

Ambient temperature: –10 … +40 °C

Ambient humidity: 0 … 100 % RH (non-condensing)

Recommended minimum flow at sensor: > 2 l/min

Additional technical features:

Polymer sensor with integrated measuring chamber

Optimized response time (t90):

–50 °C → –20 °C: 20 s

0 °C → –40 °C: 120 s

Backlit graphic display
Advanced configuration via S4C software through USB
EMC protection according to IEC 61326-1
Approximate weight: 520 g

Exchange calibration service available, allowing sensor replacement without shutting down system operation.

Continuous dew point monitoring with integrated alarms for maximum system protection.

Quick installation and direct connection to the compressed air line with a Plug & Play system.

Downloads

Manual S305

Catálog S305 ENG

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S305 Dew Point Monitor

Dew Point Monitor with Alarm (–50 … 20 °C Td / –20 … +50 °C Td)

Description