Published July 9, 2026 at 08:40
Emergency call at 22:15 on a Tuesday evening. The facility caretaker: ”There’s a burning smell coming from the electrical panel on the 4th floor, and no one has been able to locate the issue. We’ve shut off everything except what’s absolutely necessary.” The electrician arrives with his tool bag. Traditionally: multimeter in one pocket, thermal camera in the other. Open the electrical cabinet, pull out the thermal camera, scan, spot a hot spot at terminal 47, put the thermal camera away, take out the multimeter, measure voltage across terminal 47, register 235 V instead of the expected 230 V, measure impedance to ground, find elevated values — a loose neutral conductor. Total time: 8-10 minutes. With the FLIR DM285: the electrician has ONE single unit that does everything. Total time: 2-3 minutes.
What the combination actually means
The DM285 features a 160×120 pixel thermal sensor integrated directly into the top edge of the multimeter. The display shows the thermal image superimposed over the multimeter’s standard LCD readout. This is not a ”gadget” — it is a fundamental workflow transformation:
- The electrician first scans visually (thermally) to locate the problem.
- Then performs measurements (voltage, current, resistance, continuity) on the identified point.
- All without switching instruments or moving hands between tools.
The screen can display either a pure thermal image, pure multimeter readings, or both side-by-side in split-screen mode. The electrician chooses according to current needs.
18 measurement functions in the DMM section
The DM285 measures all standard electrical parameters expected of a full-fledged multimeter:
- AC/DC voltage (up to 1000 V)
- AC/DC current (via clamp adapter, up to 400 A)
- Resistance (up to 40 MΩ)
- Continuity with acoustic beeper
- Diodes
- Capacitance
- Frequency
- Duty cycle
- Temperature (via included Type-K thermocouple)
- True-RMS measurement for non-sinusoidal signals
True-RMS is critical for modern installations where rectifiers and switching power supplies generate non-sinusoidal currents. A standard averaging multimeter would underestimate the RMS value by 15-40%.
Thermal sensor: 160×120 pixels, 0.05 °C sensitivity
160×120 pixels provide 19,200 thermal measurement points per image. At a distance of 30 cm (typical electrical cabinet diagnostics distance), each pixel is ~1.5 mm — enough to distinguish between individual terminals on a busbar.
A thermal sensitivity of 0.05 °C means that differences as small as 0.05 °C between adjacent pixels appear as distinct color variations. For electrical diagnostics, this is critical: a loose terminal that is 3 °C above ambient is easily visible; a terminal running 15 °C hot shows up in immediate bright red, instantly alerting the operator.
METERLiNK — images + readings in a unified documentation workflow
The Bluetooth METERLiNK protocol allows measurement data from the DM285 to be embedded into FLIR’s standalone thermal cameras (e.g., the FLIR E-Series or Cx-Series). This opens up possibilities for larger projects where the thermographer uses a dedicated high-resolution camera while documenting electrical measurements from the DM285.
Practical result: the electrician uses the DM285 for field diagnostics and quick thermal scans; the thermographer follows up later with the E-Series for formal documentation. The Bluetooth link between the two makes the documentation workflow seamless.
Build quality: engineered for tough workshop environments
The instrument is drop-tested according to military specifications (MIL-STD-810G) from a height of 1.8 meters. IP54 protection shields against dust and water splashes. Built-in worklight for dark electrical enclosures. Laser pointer to precisely target the terminal or component being measured.
Battery life: typically 8-12 hours of continuous use per full charge. USB-C charging. For full-time electricians using the tool throughout an 8-hour workday, a single charge per day is all it takes.
Where the combo tool makes a real difference
Electrical panel diagnostics: The benchmark application. Thermal scanning reveals hot spots without touching live components.
Motor drive analysis: Thermal imaging of motor bearings combined with electrical measurement of current imbalances in three-phase systems.
PV solar systems: String-level thermography to find defective cells + electrical voltage/current measurements.
HVAC controllers: Climate control system diagnostics.
Industrial process control: PLC systems and sensor networks evaluated with both electrical and thermal analysis.
Building commissioning: Verification of newly completed installations.
Turnkey service calls: Fast on-site diagnostics for homeowners or small businesses.
What you get for your money
FLIR DM285 True-RMS multimeter with built-in HR thermal imaging (160×120 pixels, 0.05 °C sensitivity), Bluetooth METERLiNK for wireless data transfer, 18 electrical measurement functions, laser pointer, integrated worklight, MIL-STD-810G drop-test certified, IP54 dust/water protection, USB-C charging, 8-12 hours of battery life, Type-K thermocouple included, Type-K test leads. 8,649 kr.
Compared to a separate professional multimeter (~4,000-8,000 kr) + a separate FLIR thermal camera (~10,000-15,000 kr): total cost 14,000-23,000 kr for two physical instruments. This combination tool is 40-60% cheaper and takes up half the space in your tool bag. For electricians performing diagnostic work regularly, the economic value is immediately clear.
Read more: FLIR DM285 TRMS multimeter with thermal imaging in the shop →
