DeFelsko PosiTector DPM L Dew Point Meter Logger

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Magnetic probes attach to steel structures for monitoring climatic conditions

Measures and records climatic conditions including: relative humidity, air temperature, surface temperature, dew point temperature, difference between surface and dew point temperatures, and wet bulb temperature.

Magnetic probes attach to steel structures for monitoring climatic conditions.

Measures and records climatic conditions including: relative humidity, air temperature, surface temperature, dew point temperature, difference between surface and dew point temperatures, and wet bulb temperature.
Fast response, precision sensors provide accurate, repeatable readings
Environmentally sealed enclosure — weatherproof, dustproof, and shockproof—meets or exceeds IP65
Internal memory storage of 10,000 datasets (60,000 readings)
Made in USA flag with black text below

Conforms to ISO 8502-4, BS 7079-B4, ASTM D3276, IMO PSPC, SSPC-PA7 and US Navy NSI 009-32

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Kit Contents
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DeFelsko DPML PosiTector DPM L Dew Point Meter Logger
CR2032 Lithium
Air / Surface Temperature Sensors, RH Sensor
PosiTector App Compatible

Protective Cover
Instructions
Long Form Certificate of Calibration traceable to NIST

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DeFelsko DPMLPLUS PosiTector DPM L Dew Point Meter Logger
AAA Alkaline
Air / Surface Temperature Sensors, RH Sensor
PosiTector App Compatible
2 Year Warranty

USB Port for Continuous Power
WiFi for Unattended Monitoring and Email Alarms
Protective Cover
Instructions
Long Form Certificate of Calibration traceable to NIST

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Features
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Simple

Attaches to steel structures to measure and record environmental parameters independently for up to 200 days (DPM L) or 600 days (DPM L+)
Records parameters at user selected intervals from 1 min. to 8 hrs.
Connect via Bluetooth to an Apple/Andriod device to view live data, configure settings, start logging, and email reports
Uses common CR2032 Coin cell (PosiTector DPM L) or AAA batteries (PosiTector DPM L+)

Powerful

Automatically generate user-formatted reports and share via email, text, and cloud storage services
Internal memory storage of 10,000 datasets (60,000 readings)- every stored dataset is date and time stamped

Durable

Environmentally sealed enclosure—weatherproof, dustproof, and shockproof—meets or exceeds IP65
Two-year warranty
Kensington Security Slot for anti-theft protection. PosiTector DPM L Lock, sold separately.

Accurate

Fast response, precision sensors provide accurate, repeatable readings
Certificate of Calibration showing traceability to NIST included
Conforms to national and international standards including ISO and ASTM

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Ideal for unattended logging of environmental data

Includes all listed features

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Ideal for unattended logging and remote monitoring of environmental data

Automatically upload readings to PosiSoft.net at user-specified intervals to remotely monitor conditions (WiFi network required)
Configure email alarms for notification when conditions exceed pre-set thresholds
USB port for supplying continuous power
Automatically group readings into batches daily, weekly, or monthly intervals

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Specifications
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	Range	Accuracy	Resolution
Surface Temperature	-10° to 0° C	± 1.5° C	0.1° C
	>0° to 80° C	± 0.5° C	0.1° C
	>80° to 100° C	± 1.5° C	0.1° C
	14° to 32° F	± 2.7° F	0.1° F
	>32° to 176° F	± 0.9° F	0.1° F
	>176° to 212° F	± 2.7° F	0.1° F
Air Temperature	-10° to 60° C	± 0.5° C	0.1° C
	14° to 140° F	± 1° F	0.1° F
Humidity	0 to 100%	± 3%	0.1%
Dew Point	-60° to 60° C	± 3° C*	0.1° C
Dew Point	-76° to 140° F	± 5.4° F*	0.1° F

* Dependent on RH. See Dew Point (Td) Accuracy for more information.

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DeFelsko PosiTector DPM

Measures and records climatic conditions including: relative humidity, air temperature, surface temperature, dew point temperature, wind speed, and difference between surface and dew point temperatures. Ideal for surface preparation as required by ISO 8502-4, BS 7079-B4, ASTM D3276, IMO PSPC, SSPC-PA7, and US Navy NSI 009-32

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DeFelsko DPMLLOCK Kensington Lock PosiTector DPM L Lock Kit

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DeFelsko DPMLBAT Available in packs of five (5) CR2032 Battery (Pack of 5)

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DeFelsko DPMLFILTER Replacement Filters (10 pk) for the PosiTector DPM L and the PosiTector DPM L+

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Downloads
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DeFelsko PosiTector DPML Dew Point Meter - Data Sheet

DeFelsko PosiTector DPML Dew Point Meter - Instruction Manual

DeFelsko PosiTector DPML+ Dew Point Meter - Data Sheet

DeFelsko PosiTector DPML+ Dew Point Meter - Instruction Manual

DeFelsko PosiTector DPM Dew Point Meter - Online Instructions Manual with Videos

DeFelsko Accessories for Inspection Instruments - Online Catalog

F.A.Q.

Do your instruments require any formal training for use? Do you offer ‘demo’ models?

No. Our instruments are designed for simple operation, feature easy-to-use menus, both full and quick instruction manuals, and helpful videos. In lieu of demonstration models, we provide unlimited technical support via telephone and/or email, and a limited 30-day money back guarantee.

How often should the PosiTector probe be recalibrated?

PosiTector probes include a Certificate of Calibration with no expiry or end date. They have no shelf life, therefore the length of time in the field is not a good indicator for recalibration intervals. Many organizations with quality programs and recertification programs require annual recalibrations, and this is a good starting point for most users. DeFelsko recommends that customers establish calibration intervals based upon their own experience and work environment. Based on our product knowledge, data and customer feedback, a one year calibration interval from the date the instrument was placed in service is a good starting point.

Is the DeFelsko PosiTector DPM L calibrated at the factory?

The DeFelsko PosiTector DPM L arrives fully calibrated and ready to measure. A Long-Form Certificate of Calibration traceable to NIST or PTB is included, which documents actual readings taken by your instrument at our calibration laboratory on standards traceable to a national metrology institute. Beware of ‘Certificates’ or ‘Certificates of Conformance’ offered by competitors. These typically do not include actual instrument readings, and are often insufficient to meet common quality requirements.

Does the DeFelsko PosiTector DPM L provide a wet-bulb temperature measurement?

Yes. When combined with either a PosiTector Advanced gage body or iOS/Android smart device, the DPM L will indicate a wet-bulb temperature measurement.

Is the DeFelsko PosiTector DPM L suitable for applications with low or negative dew point temperatures?

The DeFelsko PosiTector DPM L provides accurate dew point readings (±3° C) down to -40° C.

Dew point is a calculated value, based on temperature and humidity. At low negative dew point temperatures, the calculation is highly dependent on relative humidity and changes of ±3% RH (the tolerance of the PosiTector DPM’s humidity sensor) can have a significant impact on the dew point temperature.

The Dew Point (Td) Accuracy page details the accuracy of the calculated dew point temperature based on the measured temperature and humidity.

How long does it take the logger to acclimate, and provide accurate readings in a new environment?

The DeFelsko PosiTector DPM L, like other electronic dew point meters, requires adequate time to acclimate to its operating environment. When moving between similar environments, the instrument will stabilize in a matter of seconds. However, when moving between environmental extremes (like between a dry, air conditioned vehicle and the warm, humid outdoors) it can take up to 30 minutes for readings to stabilize.

If left in a dry environment for an extended period of time, this stabilization process may take longer. To restore the original response time, wrap the sensor in a damp cloth overnight.

Is the DeFelsko PosiTector DPM L suitable for logging temperatures inside an oven?

No. We do not recommend our PosiTector DPM L for operation in an oven. Delicate internal components and assembly materials are prone to premature damage when subjected to prolonged use in a closed environment with temperatures greater than approximately 50° C (122° F).

How long does the battery last on a DeFelsko PosiTector DPM L?

Depending on the logging interval, the battery on a PosiTector DPM L can last several months. For example, at 5 minute intervals the logger will last 120 days. At 1 hour intervals, the PosiTector DPM L will last 200 days. The stated battery life is for unattended logging. Battery life is reduced while connected to the PosiTector app or instrument.

What is the operating temperature range of the DeFelsko PosiTector DPM L?

The operating temperature range of the DeFelsko PosiTector DPM L is -10 to 60° C (14 to 140° F).

ADD TO CART THE ITEMS YOU WOULD LIKE TO PURCHASE
DeFelsko PosiTector DPM L Dew Point Meter Logger View Model Details	$485.00
DeFelsko DPMLPLUS PosiTector DPM L+ Dew Point Meter Logger View Model Details	$645.00
DeFelsko DPMLLOCK Kensington Lock PosiTector DPM L Lock Kit	$65.00
DeFelsko DPMLBAT Available in packs of five (5) CR2032 Battery (Pack of 5)	$10.00
DeFelsko DPMLFILTER Replacement Filters (10 pk) for the PosiTector DPM L and the PosiTector DPM L+	$15.00

ADD TO CART THE ITEMS YOU WOULD LIKE TO PURCHASE

Models

Price

DeFelsko PosiTector DPM L Dew Point Meter Logger View Model Details

$485.00

DeFelsko DPMLPLUS PosiTector DPM L+ Dew Point Meter Logger View Model Details

$645.00

Recommended Accessories

PRICE

DeFelsko DPMLLOCK Kensington Lock PosiTector DPM L Lock Kit

$65.00

DeFelsko DPMLBAT Available in packs of five (5) CR2032 Battery (Pack of 5)

$10.00

DeFelsko DPMLFILTER Replacement Filters (10 pk) for the PosiTector DPM L and the PosiTector DPM L+

$15.00

DeFelsko PosiTector DPM L Dew Point Meter Logger

Images & Videos

DeFelsko PosiTector DPM L Dew Point Meter Logger

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