PosiTector DPM L Series 5:08
Introducing the expanded family of PosiTector DPM Dew Point Meter models with enhanced remote monitoring capabilities from DeFelsko- the Measure of Quality
Hands-Free, Long-Term Environmental Monitoring
The PosiTector DPM L and DPM L+ are compact, magnetic loggers designed to automatically record critical environmental conditions for coatings. Measuring air temperature, surface temperature, relative humidity, dew point, delta T, and wet bulb temperature, they attach directly to steel surfaces and monitor conditions continuously for weeks or months at a time.
With battery life of up to 200 days (DPM L) or 600 days (DPM L+), these loggers provide a reliable, traceable record of site conditions, helping inspectors, contractors, and asset owners ensure coating projects are completed under compliant conditions.
Supplied in the UK by DFT Instruments, every logger comes with a UKAS/NIST-traceable calibration certificate, full technical support, and local recalibration services for long-term reliability.
Features
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)
Conforms to ISO 8502-4, BS 7079-B4, ASTM D3276, IMO PSPC, SSPC-PA7 and US Navy NSI 009-32
Why Continuous Logging Matters
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Full Environmental Records
Handheld spot checks only provide snapshots. Continuous logging gives you a complete dataset of conditions over time, reducing risk of disputes and helping identify the exact cause of coating failures. -
Remote & Hard-to-Reach Locations
Perfect for jobsites like pipelines, offshore structures, bridges, and storage tanks, where constant manual measurement isn’t practical. -
Compliance Made Simple
Logged data satisfies the requirements of ISO 8502-4, ASTM D3276, SSPC-PA7, and other industry standards for environmental monitoring before and during coating application. -
Proactive Alerts
The DPM L+ can be configured to send email alerts when conditions drift outside of your set thresholds, allowing immediate corrective action. -
Cost & Labour Savings
With 200–600 days of battery life, inspectors can reduce manual checks while maintaining confidence in environmental conditions.
Why Choose DFT?
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Official UK Distributor – Genuine DeFelsko loggers supplied with warranty and certification.
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UKAS-Traceable Calibration – Every unit arrives with a long-form calibration certificate; DFT offers fast local recalibration.
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Expert Setup Support – Advice on sampling intervals, alarm thresholds, and data reporting.
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Secure & Reliable – Magnetic mount and Kensington lock slot keep the logger stable and theft-resistant.
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2 Year UK Warranty – Easy access to service, spares, and local customer support.
Helpful PosiTector DPM Videos
Remote Monitoring 6:36
Measuring environmental conditions and remote monitoring with the PosiTector DPM Dew Point Meter series from DeFelsko—the Measure of Quality.
Webinar 23:11
A webinar from DeFelsko featuring the PosiTector DPM Dew Point Meter. Recorded from the live stream of this webinar on March 15, 2018.
Features & Benefits
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Magnetic Mounting – Securely attaches to steel surfaces, no tools required.
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Extended Battery Life – Up to 200 days on DPM L and 600 days on DPM L+.
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Large Data Storage – Stores 10,000 datasets, automatically grouped into daily, weekly, or monthly logs.
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Wireless Connectivity –
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DPM L: Bluetooth for easy download via PosiTector App.
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DPM L+: Adds Wi-Fi for cloud uploads, remote monitoring, and email alerts.
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USB Continuous Power (L+) – Enables indefinite logging for long-term fixed installations.
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Rugged IP65 Enclosure – Dustproof, water-resistant, and field-ready.
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Security Lock Slot – Kensington lock option prevents unauthorised removal.
Comparison: DPM vs DPM L
| Feature | PosiTector DPM (Handheld) | PosiTector DPM L / L+ (Logger) |
|---|---|---|
| Application | Manual site checks | Long-term unattended monitoring |
| Measures | RH, air/surface temp, dew point, ΔT, wind speed | Same + wet bulb (Logger) |
| Data Storage | 2,500 (Std) / 100,000 (Adv) readings | Up to 10,000 datasets / 200-600 days |
| Alerts | Device display + audible/warning | Wi-Fi/email alerts (L+) |
| Connectivity | USB, Wi-Fi, Bluetooth | Bluetooth & Wi-Fi (L+) |
| Best For | Pre-application checks | Remote/coating application monitoring |
Model Comparison: DPM L vs DPM L+
| Feature | DPM L | DPM L+ |
|---|---|---|
| Battery Life | Up to 200 days (CR2032 coin cell) | Up to 600 days (AAA batteries) |
| Data Storage | 10,000 datasets | 10,000 datasets |
| Logging Interval | 1 min – 8 hrs | 1 min – 8 hrs |
| Connectivity | Bluetooth only | Bluetooth + Wi-Fi |
| Alerts | None (data downloaded manually) | Email alerts via Wi-Fi |
| Continuous Power | No | Yes, via USB |
| Best For | Standard long-term monitoring | Advanced projects needing remote alerts & longer runtime |
Order Guide
FAQ’s
What is the main difference between the DPM L and DPM L+?
Both log the same environmental parameters. The PosiTector DPM L+ offers extended battery life (up to 600 days vs 200 days), Wi-Fi connectivity, email alerts, and the option for continuous USB power.
How is the logger installed?
It attaches magnetically to steel structures such as bridges, pipelines, or tanks. A Kensington lock slot helps prevent theft. No tools are required for setup.
What does it measure?
The DPM L series logs air temperature, surface temperature, relative humidity, dew point, delta T, and wet bulb temperature.
How much data can it store?
Each logger can store 10,000 datasets, which can be grouped by day, week, or month. Data can be downloaded via Bluetooth or synced automatically via Wi-Fi on L+ models.
Does it provide real-time alerts?
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DPM L: Data is downloaded via Bluetooth after logging.
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DPM L+: Provides email alerts if conditions go outside set limits, letting you take action immediately.
How often does it take readings?
Logging intervals can be set between 1 minute and 8 hours, depending on project requirements.
What happens if the battery runs out?
Data is stored safely even if the battery is depleted. Simply replace the batteries (CR2032 for L, AAA for L+) to resume logging.
Does it meet industry standards?
Yes, logged data satisfies ISO 8502-4, ASTM D3276, SSPC-PA7, and other international standards for environmental monitoring in coating applications.
Can I use it in harsh environments?
Yes. It has an IP65-rated enclosure for dust and water protection, making it suitable for long-term exposure in challenging conditions.
How is data accessed and reported?
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Via Bluetooth to the free PosiTector App (iOS/Android).
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Via Wi-Fi (L+) to PosiSoft.net, where reports can be generated and shared.
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Via USB (L+) for continuous power and direct downloads.
Do I need calibration for the logger?
Yes. Each unit is supplied with a long-form calibration certificate traceable to NIST/UKAS, and DFT offers fast UK recalibration services.
Still need help?
If you experience an issue, check our troubleshooting guide or contact our support team directly. As a DeFelsko Authorised Service Centre (DASC), DFT Instruments provides calibration, repair, and technical assistance locally in the UK.
Find out more about the PosiTector DPM L and all the features that come with it
What’s Included:
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PosiTector DPM L or L+ logger
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Battery pack (CR2032 for L, AAA for L+)
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Calibration certificate traceable to UKAS/NIST
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Protective case or holster
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2 year warranty
Need long-term environmental monitoring for your coating projects? The PosiTector DPM L and L+ Dew Point Loggers provide hands-free, fully traceable records of site conditions for weeks or months at a time. Supplied and serviced in the UK by DFT Instruments.
📞 To enquire about this product, contact our team today on: 01442 879494 or Complete the form.