* Dependent on RH. See Dew Point (Td) Accuracy for more information.
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Connect to the PosiTector App, an easy-to-use mobile app (iOS/Android) that wirelessly connects to PosiTector DPM L Series probes using Bluetooth.
Automatically upload readings to PosiSoft.net using a WiFi connection, to remotely monitor job site conditions from anywhere using a PC or Mac.
PosiTector probes include a Certificate of Calibration showing traceability to NIST or PTB included (Long Form) with each probe—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.
The PosiTector DPM L and DPM L+ arrive 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.
Yes. The DPM L and DPM L+ will indicate a wet-bulb temperature measurement.
The PosiTector DPM L and PosiTector DPM L+, like other electronic dew point meters, require adequate time to acclimate to their operating environment. When moving between similar environments, the instruments 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.
No. We do not recommend our PosiTector DPM L series 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 ≈ 50° C (122° F).
However, the PosiTest OTL Oven Temperature Logger with 6 K-type thermocouple ports is ideal for measuring and recording oven temperature profiles. A wide variety of temperature probes are available to measure up to 1,000° C (1832° F). The PosiTest OTL XT features an enhanced holder with heatsink for greater endurance at high temperatures.
https://www.defelsko.com/positest-otl
Battery life depends on the user selected logging and sync intervals. Both the PosiTector DPM L and PosiTector DPM L+ can last several months.
For example, the PosiTector DPM L logging at 5 minute intervals will last up to 120 days. 1 hour intervals, will last 200 days.
The PosiTector DPM L+, on the other hand, has a larger capacity and can last 270 days with a 1 minute logging interval and 1 hour sync interval. Syncing only once every 24 hours increases the battery life to almost 2 years. The PosiTector DPM L+ includes a USB port for continuous power and extended logging.
The stated battery life is for unattended logging. Battery life is reduced while connected to the PosiTector app via Bluetooth.
The normal operating temperature range of the PosiTector DPM L Series is -10 to 60° C (14° to 140° F). The PosiTector DPM L Series surface temperature probes can measure on surfaces up to 100° C (212° F) with short exposure times.
Selecting the right instrument depends on the application, available connectivity options, and preferences.
Both the PosiTector DPM L and DPM L+ attach to steel structures to measure and record environmental parameters independently. Stored datasets can be downloading using an Apple or Android smart device running the PosiTector App.
The main differences are the available battery life and connectivity options.
PosiTector DPM L:
The PosiTector DPM L+:
No. Our instruments are designed for simple operation, feature easy-to-use menus, 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.
Before returning your gage or instrument for service, review the troubleshooting steps on the Troubleshooting guide, or speak with a member of our technical support team by calling +1-315-393-4450.
10 pack of replacement filters for the PosiTector DPM L and PosiTector DPM L+
Available in packs of five (5) CR2032 batteries.
For use with the PosiTector DPM L.
Optional Lock for PosiTector DPM L Series.
Keeps both PosiTector DPM L and PosiTector DPM L+ safe and secure.
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Stated accuracy of Td is ±3C for Td from -40 to 80C.
The following charts illustrate the maximum error of Td with respect to Ta and RH.
View PDF of Accuracy Statement here.
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