DeFelsko PosiTector DPM-L Probe

DeFelsko PosiTector DPM L Dew Point Meter Logger features a magnetic probe to attach to steel structures for monitoring climatic conditions.

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DeFelsko’s PosiTector DPM DewPoint Meter brings greater versatility and convenience to all coatings inspection applications. Dew point measurement is an important and necessary aspect of preparation for coatings application, to ensure proper adhesion of coatings to surface. With PosiTector DewPoint Meter, measurement of relative humidity, surface temperature, air temperature, dew point temperature, and difference between surface and dew point temperatures, is performed simultaneously with a single gauge, with no need to consult complex tables or use a dewpoint calculator. Read all measurement parameters easily on the large LCD display, store measurements internally in the gauge, download readings to your computer, or upload to DeFelsko’s cloud-based application, PosiTector DPM can be set up to AutoLog at user-selected intervals for continuous monitoring of all measurement values.


  • Universal Gauge Body accepts all PosiTector probes: DPM, 6000, 200, SPG, RTR, RTR-3D, UTG, SST, SHDD, or SHDA
  • PosiTector SmartLink turns your mobile device into a PosiTector Dew Point Meter
  • high-contrast, reversible, colour LCD display
  • Enhanced one-handed menu navigation
  • Internal memory stores measurements with the touch of a button
  • Every stored reading is date- and time-stamped
  • PosiSoft USB drive – stored readings and graphs can be accessed using PC or Mac web browsers or file explorers without needing a software download.
  • Auto Log Mode automatically records all parameters at user-selected time intervals
  • Readings are constantly updated and displayed simultaneously
  • Audio and visual alarm indicate when climate conditions are unsuitable for painting
  • RESET feature instantly restores factory settings
  • All probes are compatible with both Standard and Advanced PosiTector Gauge bodies
  • Sealed USB port connects to PC to view or download readings, or to supply continuous power. USB cable is included
  • Rugged indoor/outdoor instrument is solvent, acid, oil, water, and dust resistant –  weatherproof
  • Shock-absorbing, protective rubber holster with belt clip
  • Fast response, precision sensors provide accurate, repeatable readings
  • Smart Trend™ indicators identify falling rising, or stable readings
  • Celsius / Fahrenheit switchable
  • Selectable display languages
  • Large LCD screen with high-contrast backlit display
  • Flip display permits right-side-up reading from any position
  • Hold function freezes the display to allow manual recording of values
  • Screen Capture saves screen images to memory
  • Uses alkaline or rechargeable batteries. Built-in battery charger
  • Software updates via the web keep your instrument current
  • NIST-traceable calibration certificate
  • Two-year warranty on body and probe
  • Conforms to national and international standards: ISO 8502-4; BS 7079-B4; ASTM D3276, IMO PSPC, SSPC-PA7, and US Navy NSI 009-32

Standard Model PosiTector DewPoint Meters also Feature:

  • Storage of 2500 data sets (Rh, Ta, Ts, Td, Ts-Td) which can be viewed or downloaded
  • Auto-Log Mode automatically records measurements at user-selected intervals, allowing unattended monitoring of environmental conditions. Runs unattended on batteries for up to 50 hours, or continuously via USB.

Advanced Models (DPM3) add the following features:

  • Storage of 20,000 data sets in up to 1000 batches and sub-batches. Stored readings can be viewed or downloaded.
  • Auto-Log mode automatically records all 5 measurement parameters at user-selectable intervals. Data can be live-streamed to via USB or Bluetooth at each interval, and can be viewed remotely via computer. Runs unattended on batteries for up to 8 months or continuously via USB.
  • Data transfer via USB to computer OR
    • via Bluetooth Wireless Technology to a computer or optional printer  OR
    • wirelessly sycn with, download software updates, and connect to mobile devices using WIFI technogy
  • On-screen help, real-time graphing, picture prompting, and batch notes
  • On-screen batch annotation – add notes, change batch names and more, with built-in QWERTY keyboard
  • Store each of coating thickness, surface profile, environmental, and wall thickness measurements in individual batches
  • User-defined limits for all parameters with audible and visible alarms
  • Wet Bulb temperature can be displayed
  • Trend Charts graph readings in real-time
Weight227 g
Dimensions185 × 121 × 51 mm

The PosiTector DPM L comes complete with:

  • Air/Surface Temperature Sensors
  • RH Sensor
  • Two CR2032 Coin Cell Batteries
  • Instructions
  • Certificate of Calibration traceable to NIST
  • Storage Container
  • Two Year Warranty

Optional K-Type Sensors:

A  Hand-Held Surface Temperature Sensor – for spot-checking hard-to-reach surfaces

B  Self-Adhering Surface Temperature Sensor – sticks to solid materials including aluminum, wood, concrete, etc. Ideal for unattended monitoring

C  Liquid Temperature Sensor – general purpose sensor with stainless steel shaft

Optional Accessories:

Bluetooth Printer – for use with Advanced model gauges

Rechargeable Batteries – one set of eneloop NiMH AAA batteries AC Power Kit – for continuous operation or battery charging – works in any country

Protective Lens Shields – protect the display from overspray. Simply replace the shield when the LCD is obscured

PosiTector DPML Datasheet

Click here to download the PosiTector DPML Datasheet