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Measuring Environmental Conditions and Remote Monitoring with the Dew Point Meter Series

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Video Transcript

Measuring environmental conditions and remote monitoring with the PosiTector DPM Dew Point Meter series from DeFelsko—the Measure of Quality.

During the application of protective coatings and other processes, it is critical to ensure that environmental conditions stay within project specifications.

Most importantly, the surface temperature must stay above the dew point- the temperature at which condensation forms. This surface moisture is often invisible, but can cause corrosion and premature failure when trapped beneath a coating.

However, the dew point isn’t the only important variable - parameters including temperature, humidity, and wind speed can influence how coatings cure and bond, and can impact job site safety.

PosiTector DPM Dew Point Meters are comprised of two components, a gage body and probe. The gage body is available in either Standard or Advanced models. All models feature a large touchscreen, easy-to-navigate menus, memory, a weatherproof, dustproof, and water-resistant IP65-rated enclosure, and award-winning probe interchangeability allowing a single gage body to accept all environmental, coating thickness, surface profile, soluble salt, gloss, hardness, and wall thickness probes. Additionally, both models feature Auto Log mode that records environmental parameters, alarms that indicate when the climate conditions are unsuitable for painting, and SmartTrend Indicators that identify rising, falling, or stable readings.

Advanced models feature additional memory, WiFi and Bluetooth connectivity, trend charts for graphing readings in real-time, and enhanced Auto Log mode for up to 8 months of continuous monitoring on a single set of batteries. Advanced models can also display and record wet bulb temperatures.

The PosiTector DPM family of probes measure environmental parameters quickly and easily using high quality, precisely calibrated sensors. Each PosiTector DPM probe includes a FREE Certificate of Calibration traceable to NIST and a two year warranty.

When compared to old methods like sling psychrometers, the digital PosiTector DPM is more accurate, easier to use, includes internal memory, and features the PosiSoft suite of software for archiving data and creating professional reports. There’s no need to interpret complex look-up charts or use weather charts with barometric tables.

There are six Dew Point Meter probes, suitable for measuring environmental conditions in a variety of applications.

The PosiTector DPM Dew Point Meter contains ambient temperature and humidity sensors, in addition to an integrated surface temperature sensor. At a glance, view relative humidity, air temperature, surface temperature, dew point temperature, and the all-important difference between surface and dew point temperatures.

The PosiTector DPM S Integral Probe with Cabled Surface Temperature Sensor features a K-type thermocouple connector. The included magnetic surface temperature probe is ideal for continuously logging surface temperatures. The optional liquid temperature sensor can measure the temperature of paints prior to application.

The PosiTector DPM IR Infrared Thermometer includes the same ambient temperature and humidity sensors from the PosiTector DPM plus an infrared surface temperature sensor. The infrared sensor doesn’t require contact with the surface, making the inspection of large, hot, or hard-to-reach areas quick and easy.  

The PosiTector DPM A Integral Probe with Wind Speed Sensor includes the same sensors as the Integral Probe, in addition to a wind speed sensor. Using precision hot-wire anemometer technology, airspeed is measured accurately in a variety of units, with no moving parts.

The PosiTector DPM D Cabled Probe with half-inch NPT Threads is designed for insertion into tanks or pipelines, and can measure ambient temperature, humidity, and dew point in areas other instruments can’t reach.

The PosiTector DPM L Dew Point Meter Logger magnetically attaches to steel structures to measure and record environmental parameters for up to 200 days. The PosiTector DPM L is weatherproof, dustproof and shockproof.  View live measurement data and automatically download logged readings using the PosiTector Advanced gage body or an Apple/Android smart device via Bluetooth Smart Technology.

All PosiTector DPM models feature the innovative Auto Log feature, turning your dew point meter into an environmental monitoring station.

Standard models store environmental parameters at user-selected time intervals for up to 50 hours. Alternatively, use the optional AC power adapter for continuous power.

Advanced models power off between readings for up to 8 months of battery life, and can group measurements into batches on a daily, weekly, or monthly basis. Using the built-in WiFi connection, each reading is synchronized to the cloud for remote monitoring.

All PosiTector DPM models feature an alarm mode. When the alarm is enabled, visible and audible warnings sound when the surface temperature is within three degrees Celsius or five degrees Fahrenheit of the dew point as per international standards.

On Advanced models, custom alarm limits can be set for each parameter. When a limit is exceeded, email alerts can be sent via WiFi.

Use PosiSoft Software to download readings via USB and quickly create custom, professional reports. Readings can be also be imported from one or more remote wifi-connected PosiTector DPM gages in the field. The PosiTector DPM monitor feature makes it easy to review data and spot trends.  

The PosiTector DPM series takes highly accurate measurements in nearly any environment, and quickly responds to changing conditions. When moving any electronic temperature or humidity gages between significantly different environments, such as between an air-conditioned vehicle and a humid job site, wait at least 15 minutes for readings to stabilize. If the instrument has been stored for long periods in a low-humidity environment, the probe can be wrapped in a damp cloth overnight to improve the response time in high-humidity environments.  

PosiTector DPM Dew Point Meters are the simple, durable, and accurate solution for measuring environmental conditions, and are a valuable addition to any PosiTector Inspection kit. Backed by DeFelsko’s renowned quality, customer service, and exceptional two-year warranty, PosiTector Dew Point Meters are the ideal choice for environmental monitoring.

Learn more about the expanded PosiTector DPM range at