WADS 205 – Dew Point Sensor
Dew Point Sensor WADS 205 – Compressed Air Moisture Monitor
Dew Point Monitor WADS 205
WADS 205 – Dew Point Monitor
Model Selector (WADS 205 / 206)
Use this selector to generate the correct ordering code based on pipe size and options.
Product Description
Key Features
- Wall Mounting Casing Confirming to IP 65 Standards
- Are Available in a Wide Range of Models to Measure PDP from -110 Ctd to + 60 Ctd
- MEMS Based Pressure Sensor for Simultaneous Monitoring of Dew Point and Online Pressure (Absolute Pressure 1 … 17 Bar)
- Accurate to +/-2 Ctd with up to 9 Dew Point Calibration and Multi-point Temperature Compensation
- Ultra-fast Response
- Excellent Long-term Stability
- Innovative Anti-condensation, Particle, Oil and Most Chemicals Technology
- High Resistance to Electrical Disturbance
- CE marked in accordance with applicable EU Directives.
Declaration of Conformity available upon request.
Benefits
- Reduces Operating and Energy Costs
- Improves Down Stream Filter Life and Performance
- Increase the lifespan of your compressed air system and it’s components
- Reduces Maintenance and Makes the compressed air system more Reliable & Efficient.
- Ensures stable quality of your products through less problems in operation of the system
- Enables fast responses to failures in compressed air drying through permanent monitoring of pressure dew point. Reduces Risk of Bacteria, Fungus and yeast Build Up.
- Alerts you to changes in Dryer Performance Before Moisture Appears in Your Plant.
[/bt_accordion_items][/bt_accordion]
Related Case Studies & Blogs
Case Study: Why Dew Point Measurement is Important
Learn why monitoring dew point in compressed air systems is critical for product quality, energy savings, and equipment protection.
Case Study: Reducing Costs in Your Compressed Air System
See how dew point sensors helped identify moisture issues and reduce maintenance costs in a steel manufacturing plant.
How Compressed Air Monitoring Pays for Itself
A real-world case study showing the ROI of implementing compressed air monitoring with dew point sensors in manufacturing facilities.
Where the WADS 205 dew point monitor fits
The WADS 205 and 206 are the wall-mounting members of the range. Specify them when somebody on the shop floor has to see the dew point without opening a control panel or logging into a dashboard — a QA supervisor walking past the dryer house, a shift engineer doing rounds, an auditor asking to see the current reading.
The instrument reports pressure dew point and atmospheric dew point together, which removes the most common source of confusion in compressed air moisture measurement. It also carries a MEMS pressure sensor, so line pressure is measured rather than assumed — and because the conversion between pressure and atmospheric dew point depends entirely on line pressure, that is what makes the second figure trustworthy.
Choosing the alarm option
Three option sets are available and the choice comes down to who needs to know, and how fast:
| Option | What you get | Right when |
|---|---|---|
| Integrated pressure sensor | PDP, ADP and line pressure on the display | The reading is checked on rounds and logged manually. No immediate action expected. |
| Red / green lamp and buzzer | Visible and audible alarm at the instrument | Somebody is usually within sight or earshot, and a breach needs a response in minutes. |
| Both combined | Full readout plus local alarm | Regulated production. You need the number for the record and the alarm for the response. |
In pharmaceutical and food plants the combined option is usually the right specification. An auditor will ask two questions: what is your dew point limit, and how do you know when you have breached it. A logged number answers the first. An alarm answers the second.
Mounting and sampling
The IP65 wall-mounting casing is designed to sit in the dryer house or the plant room, with a sample line bringing air to the sensor. Two things decide whether it reads correctly:
- Take the sample downstream of the after-filter, at full line pressure. A sample taken after a regulator reads atmospheric-side conditions and will not match a pressure dew point specification.
- Keep the sample line short and flowing. A long, still line is a dead leg. The reading will eventually be right and will always be late, which defeats the point of having an alarm.
Both the WADS 205 and 206 are available across the WADS 200 measuring ranges, from −60 to +60 °C Td for general plant and freeze protection duties, through to −80 to +20 °C Td for the drier classes. The model selector above generates the ordering code once you choose range and options.
Frequently asked questions
What is the difference between a dew point monitor and a dew point transmitter?
A monitor displays the reading locally and usually alarms on it. A transmitter sends the reading elsewhere as a 4–20 mA or Modbus signal. If you need both, the WADS 201–204 transmitter can feed a control system while a WADS 205 provides the local readout, or you can specify a single instrument with the output you need.
Why does it show two dew point values?
Pressure dew point is the condensation temperature at line pressure, which is the number your ISO 8573-1 class refers to. Atmospheric dew point is the same air expanded to atmosphere, which is what matters if the air is discharged. At 7 bar(g) they differ by roughly 17 to 25 °C. Our pressure dew point calculator shows the relationship for your own pressure.
Can the alarm be wired to a plant system?
The alarm output can be taken to a plant alarm system or a PLC input. Tell us what it needs to drive when you enquire and we will confirm the wiring arrangement.
How often does it need calibration?
Annually is the common interval and what most auditors expect to see documented. Instruments running continuously below −40 °C drift more than those near ambient. WiseAir calibration services cover our own instruments and other manufacturers.
Related: compare all WADS dew point sensors · WADS 201–204 transmitter · WADS 207/208 with built-in display.
Need this for your plant?
Send us your line size, operating pressure and flow range and a WiseAir application engineer will confirm the right model, the delivery time and the price. We manufacture in India, so lead times are weeks rather than months.
Prefer to talk? Call +91 90477 78715. Not sure it is the right instrument? A compressed air audit tells you what to measure and where. Or start with our free compressed air calculators.
Related Products
More Dew Point Sensors
Explore Other Solutions
WISEAIR TECHNOLOGIES INDIA LLP
# 12 Sri Venkatalakshmi Nagar, Singanallur,
Coimbatore – 641005 India.
WiseAir Technologies India LLP is part of the Systel Asia group — specialists in compressed air management and smart monitoring solutions across Asia since 2002.
© Copyright 2026. WiseAir Technologies India LLP
Need this for your plant?
Send us your line size, operating pressure and flow range and a WiseAir application engineer will confirm the right model, the delivery time and the price. We manufacture in India, so lead times are weeks rather than months.
Prefer to talk? Call +91 90477 78715. Not sure it is the right instrument? A compressed air audit tells you what to measure and where. Or start with our free compressed air calculators.
