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Climate Measuring Instruments – How They Work, Dew Point & ΔT Explained Simply
Climate measuring instruments capture the key parameters needed to reliably assess the risk of condensation (moisture on the surface): air temperature, relative humidity and – depending on the setup – surface temperature. Dew point is calculated from air temperature and humidity.
For coating approvals, the dew point differential ΔT is especially important: ΔT = surface temperature − dew point. The larger ΔT, the lower the risk of moisture forming on the component. This helps you avoid adhesion issues, pinholes or defects.
Choosing the right system depends on the task: spot checks with thermometers/probes, or measurement series with data loggers for QA and documentation. We provide brand-neutral advice – matched to your location, measurement strategy and documentation requirements.
Dew Point
Calculated from air temperature + relative humidity – indicates when condensation occurs.
ΔT (Dew Point Differential)
Comparison of surface vs. dew point – the basis for safe approvals before coating.
Documentation
From quick checks to logger measurement series with export/reports for QA & audits.
Magnetic Thermometers
Fast, rugged measurement of surface temperature on metallic substrates – ideal for workshop and jobsite use.
Elcometer 113 Magnetic Thermometer (350–550 °C)
Magnetically attaches to steel and measures surface temperature in the high-temperature range – ideal for quick checks directly on the component.
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Elcometer 113 Magnetic Thermometer (0–120 °C)
Rugged classic for surface temperature on metal – ideal for workshop, jobsite and day-to-day coating approvals.
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Elcometer 113 Magnetic Thermometer (200–250 °C)
For elevated surface temperatures: magnetically fixed, quick to read and ideal for checks on hot components.
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Elcometer 113 Economy Magnetic Thermometer (0–120 °C)
Economy version for quick temperature checks on steel – ideal when rugged basic functionality is the priority.
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Elcometer 113 Magnetic Thermometer (0–500 °F, imperial)
Measure surface temperature in °F: magnetically attaching, rugged and perfect for projects with imperial requirements.
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Pocket Thermometers
Compact digital temperature measurement – flexible with matching probes for surface or air.
Elcometer Pocket Thermometer with Surface Probe
Digital temperature measurement directly on the component: ideal for quick surface checks and reliable approvals in coating processes.
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Elcometer Pocket Thermometer with Immersion Probe
For liquids and media: digital temperature measurement with immersion probe – ideal for mixing processes, baths and material temperature control.
View productSurface Temperature Probes
Contact probes for repeatable readings – important for ΔT evaluation (surface minus dew point) before coating.
Elcometer Surface Temperature Probe with Magnet (−40 to 800 °C)
Magnetically fixed for secure contact on steel – fast, repeatable surface readings for ΔT checks and approvals.
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Elcometer Surface Temperature Probe with Clamp (3 m)
Clamp probe for stable heat transfer – ideal for accurate surface temperature measurement on components in the working area.
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Elcometer Surface Temperature Probe with Clamp (1.5 m)
Short, handy cable for quick measurement points – clean surface measurement with secure clamping.
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Elcometer Surface Temperature Probe with Magnet (6 m)
More reach for large components and hard-to-access areas – magnetically fixed for reliable contact measurement.
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Elcometer Air Temperature Probe with Magnet (3 m)
Captures air temperature near the component – ideal as an input value for dew point/ΔT evaluation in coating processes.
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Elcometer Air Temperature Probe with Clamp (3 m)
Clamp mounting for defined positioning – reliable air temperature measurement near the component for consistent results.
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Elcometer Air Temperature Probe with Clamp (6 m)
Extra cable length for larger distances – capture air temperature cleanly without having to work directly at the instrument.
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Elcometer Air Temperature Probe with Magnet (6 m)
Magnetically fixable with long reach – ideal for measurements on large components and changing positions.
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Air Temperature Probes
Captures ambient air near the component – the basis for dew point calculation in combination with humidity sensors.
Elcometer Air Temperature Probe with Magnet (3 m)
Measures air temperature near the component – magnetically fixable and ideal as a baseline for dew point/ΔT evaluations.
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Elcometer Air Temperature Probe with Clamp (3 m)
Clamp mounting for defined positioning – reliable air temperature measurement for repeatable climate values.
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Elcometer Air Temperature Probe with Clamp (6 m)
Extra cable length for larger distances – capture air temperature cleanly without having to work directly at the instrument.
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Elcometer Air Temperature Probe with Magnet (6 m)
Magnetically fixable with long reach – ideal for measurements on large components and changing positions.
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Elcometer Air Temperature Probe with Clamp (1.5 m)
Compact and quick to use – ideal for short distances and quick air temperature checks near the instrument.
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Elcometer Air Temperature Probe with Magnet (1.5 m)
Magnetically fixable for quick use – short cable length, ideal for compact setups and spot checks on the component.
View productCombo (Air + Surface)
Combo probes capture air and surface temperature in one setup – ideal for quick ΔT checks and frequent approvals.
Elcometer Combo Probe (Air + Surface, 1.5 m)
Two readings in one setup: quickly capture air and surface temperature – ideal for fast ΔT checks directly on the component.
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Elcometer Combo Probe (Air + Surface, 3 m)
More reach for larger components: consistent measurement of air and surface temperature – saves time for frequent approvals.
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Elcometer Combo Probe (Air + Surface, 6 m)
Maximum flexibility thanks to long cable: reliably measure air and surface temperature – ideal for hard-to-access measurement points.
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Oven Temperature
For temperature profiles, process approvals and documentation during curing: oven data loggers record the temperature curve in the oven with a timestamp and enable export/reports for QA, audits and repeatable curing processes.
Elcometer 215 Oven Data Logger with Heat Shield
Records temperature profiles in the oven – including timestamp. Ideal for monitoring curing processes at high temperatures.
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Elcometer 215 Oven Data Logger without Heat Shield
Compact temperature data logger for measurement series in the oven – suitable when an external or separate heat shield is used.
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Grant OMK 610 – Standard Kit
Basic set for recording oven temperatures: ideal for simple measurement series, process approvals and traceable curing documentation.
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Grant OMK 610 – Advanced Kit
Expanded set for detailed temperature profiles: including timestamp, export functions and ideal for QA, audits and process optimization for curing processes.
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Other Climate Measuring Instruments
Dew point and humidity meters, handheld instruments for ΔT evaluation and accessories – depending on location, standard and documentation needs.
Frequently Asked Questions About Climate Measuring Instruments
Short answers about dew point, ΔT and selection – explained quickly.
What is the dew point – and why is it important?
The dew point is the temperature at which humidity condenses. If the surface temperature is close to the dew point, moisture can settle on the component – a risk for adhesion and coating quality.
What does ΔT (dew point differential) mean?
ΔT = surface temperature − dew point. A larger difference means greater safety against condensation. That’s why ΔT is a key value for approvals before coating.
Which readings do I need for a safe approval?
In practice, for dew point and ΔT evaluation you need: air temperature, relative humidity and surface temperature. Many handheld instruments calculate dew point and ΔT automatically.
Thermometer, probe or data logger – what’s right for me?
Thermometers/probes are sufficient for quick checks. If you need to prove climate conditions over time (QA, audits), data loggers are ideal – with interval measurement, timestamp and export.
How do I request a price quote?
Open the desired product in the shop and use the “Request price” button. We’ll get back to you promptly with pricing and a technical recommendation – tailored to your measuring task.
Customer Reviews
Feedback from workshops, trades and industry – real ratings on consulting, delivery time and product quality.
Need help with dew point, ΔT or measurement strategy?
We advise you personally – matched to location (jobsite, shipyard, booth), measurement point, documentation (QA/audit) and calibration. This way you quickly find the right climate measuring instrument including accessories.
