Pourquoi les compteurs de point de rosée des sécheurs sont-ils essentiels pour les systèmes d'air comprimé ?

Maybe You always battle hidden moisture in compressed air that can cause corrosion, freezing, and product defects. By installing dew point meters, you detect and stop moisture issues before equipment fails.

You can monitor dew point to prevent condensation and protect assets. The HENGKO HG970 series provides continuous dew point readings with 4–20 mA and Modbus RTU outputs, onboard logging, and diagnostics—so you can close the loop for control and energy savings.

Here, this guide explains the causes of moisture, how to choose sensors, where to place them, and how to integrate the HENGKO HG970 so you can act quickly and reduce risk.

Why Measure Dew Point?

Q1: What exactly are you measuring?
A: Dew point is the temperature at which water vapor in your compressed air will condense into liquid. Knowing dew point tells you when and where condensation will occur as air cools along the line.

Q2: What goes wrong if you ignore dew point?
A: Moisture triggers corrosion, fouling, freeze-ups, and product contamination. Typical impacts:

Q3: Where should you place sensors to catch problems early?
A: Measure after dryers, before long/cold runs, and at critical points of use:

Q4: How do you use trends (not just snapshots)?
A: Continuous logging lets you spot slow dryer decline, tower-switch spikes, and seasonal effects. A simple approach:

Q5: How should you set alarms without creating nuisance trips?
A: Use thresholds with hysteresis and time delay:

Q6: What do you do when alarms occur?
A: Follow a short, repeatable checklist:

Q7: How do you verify accuracy?
A: Commission new meters in parallel with a known reference for 2–4 weeks; perform periodic handheld spot checks at the same tap to validate readings and locate dead legs.

Q8: How do you keep people aligned?
A: Document who watches, who acts, and how:

How Do Dew Point Meters Work?

Q1: Which sensor principles should you consider?
A: Choose by required accuracy, response, and contamination tolerance.

Q2: How do you protect sensors from fouling?
A: Oil aerosols, particulates, and corrosives shorten life. Use coalescing prefilters, particulate screenset sample conditioning (heated lines or bypass chambers) in wet/dirty streams.

Q3: What outputs and protocols matter for control and diagnostics?
A:

• 4–20 mA: rock-solid for PLC control and alarms.
• Modbus RTU: multi-parameter telemetry (dew point, temperature, probe status, sensor health).

Q4: How do you plan calibration and validation?
A: Schedule per sensor type and cleanliness; log offsets from parallel checks and keep certs with your quality records.

Q5: Where does HENGKO HG970 fit?
A: HG970 combines a robust sensing module with 4–20 mA and Modbus RTU, onboard logginget health metrics. Modular probe heads simplify swap-outs to minimize downtime.

Key Features and How to Specify Them

Q1: What ranges/accuracy do you actually need?

Q2: Which features reduce lifecycle cost (not just CapEx)?

Q3: How do you turn requirements into a procurement checklist?

HG970 fit: Modular heads, diagnostics, modern I/O, and logging—designed to hit the “Stretch/Ideal” column for many plants.

What Mix of Meters Should You Deploy?

Q1: Handheld vs. inline vs. networked—how do you choose?

Q2: How do you protect and install probes for reliability?

Q3: What’s a simple commissioning plan that works?

Q4: How do you think about total cost (TCO), not just price?

Rule of thumb: if moisture excursions cost more than one probe per year, inline monitoring pays for itself.

Q5: How do you integrate HG970 with PLC/SCADA fast?

Conclusion

You prevent condensation, protect equipment, and save energy when you select, place, and integrate dew point meters correctly. The HENGKO HG970 series offers the accuracy, connectivity, logging, and diagnostics you need for reliable plant monitoring—without over-drying or surprise moisture events.