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FLIR DM66

FLIR DM66 digital multimeter, front view showing the display, rotary dial and input jacks on a white background

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FLIR DM66 TRMS Digital Multimeter with VFD Mode
FLIR DM66DM66
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Marked measurement category

CAT IV 300V, CAT III 600V

The category and its voltage belong together. Match both to the installation; the voltage range alone does not establish the category.

The buying trap. A capability or category marking does not approve the leads, setup or a live procedure.

Open the source rows
AC/DC voltage
Range 600.0 V; basic accuracy 1.0% (AC) / 0.4% (DC)
Safety rating
CAT IV 300 V / CAT III 600 V (as marked per FLIR's page)

Source record: DM66

Manufacturer specifications recorded by thisMETER. These are not our own measurements. References belong to this product record; a field-by-field source mapping is not claimed.

AC/DC voltage
Range 600.0 V; basic accuracy 1.0% (AC) / 0.4% (DC)
Safety rating
CAT IV 300 V / CAT III 600 V (as marked per FLIR's page)

Record checked 2026-11-05.

FLIR DM66. CAT IV 300V, CAT III 600V

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The DM66 is sold as a single model with VFD mode and low-pass filtering.

FLIR DM66 TRMS Digital Multimeter with VFD Mode

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Specifications checked November 5, 2026. Full product details

FLIR DM66 TRMS Digital Multimeter with VFD Mode

A True RMS digital multimeter for field service and electronics work, with a low-impedance mode, VFD-filtered voltage readings, capacitance, frequency and a Type K thermocouple input, rated CAT IV 300 V / CAT III 600 V.

Which version should you buy?

Selected package: FLIR DM66 TRMS Digital Multimeter with VFD Mode.

Selected package

Purchase links appear where the exact offer is verified. Confirm the named model, quantity and accessories before ordering.

Watch out

  • The FLIR DM284 and DM286 are separate multimeters with different feature sets.
  • A listing that includes test leads beyond the supplied TA86 leads is a bundle, not the meter alone.

Why people pick it

  • True RMS with a dedicated VFD mode, so readings on variable-frequency-drive outputs stay usable - a feature many basic multimeters lack
  • LoZ mode drains ghost voltages from induced circuits before you trust a reading
  • Measures down to microamps (6000 uA range), which suits sensor and control-loop checks on automation equipment
  • CAT IV 300 V / CAT III 600 V rating covers service-entrance-adjacent low-voltage work, per FLIR's marking
  • Type K thermocouple input plus capacitance, frequency and diode test in one compact meter

Know before you buy

  • 600 V and 10 A ceilings are lower than some field DMMs; heavier industrial work needs more range
  • Only IP40 and no listed water or dust sealing
  • Frequency counter tops out at 50 kHz; not for RF or fast logic work
  • No logging or wireless connectivity listed on the spec page - readings must be written down by hand
  • Rechargeable operation needs the optional TA04 battery pack; the standard configuration uses disposable AAs

Full specifications

AC/DC voltageRange 600.0 V; basic accuracy 1.0% (AC) / 0.4% (DC)
AC/DC mV voltageRange 600.0 mV; basic accuracy 1% (AC) / 0.4% (DC)
AC/DC currentRange 10.00 A; basic accuracy 1.5% (AC) / 1.0% (DC)
AC/DC mA currentRange 600.0 mA; basic accuracy 1.0% (AC) / 0.7% (DC)
AC/DC uA currentRange 6000 uA; basic accuracy 1.5% (AC) / 1.0% (DC)
Low impedance (LoZ) voltageAC/DC 600.0 V; basic accuracy 2.0%
VFD AC voltageRange 600.0 V RMS; basic accuracy 1.0%
Resistance600.0 kOhm (0.5%) / 6.00 MOhm (0.3%) / 60.00 MOhm (0.9%)
Capacitance200.0 nF (1.5%) / 200.0 uF (1.5%) / 10 mF (4.5-5.0%)
Diode testRange 3.000 V; basic accuracy 0.9%
ContinuityBeeper between 30 and 480 Ohm
FrequencyRange up to 50.00 kHz
Temperature (Type K thermocouple)-40 to 400 C; accuracy 1.0% + 1.5 C (DMM mode)
True RMSYes
Non-contact voltage detectionYes, with flashing backlight and audible indicator
Safety ratingCAT IV 300 V / CAT III 600 V (as marked per FLIR's page)
Battery3 AA batteries; optional TA04 Li-Poly rechargeable pack
Auto power offYes
EnvironmentalIP40; 2 m drop test
WarrantyLimited 3-year

From manufacturer documentation, checked November 5, 2026. Spotted an error? Tell us.

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Max voltage
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Display counts
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Specifications & conditions
Safety rating
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