FLIR DM66 vs DM93-2: Spot Checks or Connected Records?

Choose the FLIR DM66 for routine electrical or electronics checks when 600 V, LoZ and VFD filtering cover the job, especially if you need its dedicated microamp range. Choose the DM93-2 when you need 1000 V, higher category ratings, saved measurements and a documented METERLiNK phone workflow; neither model includes thermal imaging.

Quick picks: decide what happens after the reading

• Routine troubleshooting and small currents: DM66. Its dedicated µA ranges, LoZ and VFD voltage mode suit a meter-first workflow.
• Saving, trending and sharing electrical readings: DM93-2. Buy it for its internal recorder and Bluetooth handoff, with the phone requirements below checked first.
• Finding hot components in a picture: follow our FLIR thermal multimeter comparison. Contact temperature and thermal imaging serve different buying needs.

For alternatives across brands, start with our best multimeters. The comparison here concerns these exact FLIR models and their documented packages.

DM66 vs DM93-2: specifications that change the choice

Sources: FLIR's DM6x US manual, DM62/DM66 datasheet, DM93-2 manual and DM93-2 datasheet. These are manufacturer specifications. Display resolution is not accuracy, and a meter's temperature input range is not its supplied probe's rating.

Best for routine checks and small currents: FLIR DM66

Choose DM66 when you want LoZ, VFD voltage filtering, capacitance, contact temperature and non-contact voltage detection without a phone-based records workflow. The manual describes its REC button as MIN/MAX/AVG capture: useful for checking extremes, but no Bluetooth or exportable reading sequence is documented.

The dedicated 600.0 µA DC range deserves attention. Its displayed format gives 0.1 µA steps, a resolution calculation; the specified accuracy on that range is ±(1.0% + 3 digits). DM93-2's manual instead specifies 1 µA minimum resolution on its 40 mA range. For small-current work, that makes DM66 worth considering even against the higher-count instrument. Check accuracy and burden voltage for your application as well as the display step.

Its limitations are the lower voltage/category ratings and IP40 enclosure. Buy for the actual installation and environment, rather than assuming every FLIR meter shares the industrial model's protection.

See the DM66 model at FLIR.

Best for stored readings and reporting: FLIR DM93-2

DM93-2 is the choice when the reading must survive the service visit. Its manual separates 99 manually saved readings from an automatic recorder holding up to 10,000 readings. It also documents VFD filtering for AC current as well as AC voltage, a dual display and a worklight.

The trade-offs are a heavier instrument, more batteries and no dedicated µA range in the current table. There is also an easily missed current-duty difference: DM66's manual specifies 10 A continuous, while DM93-2's manual limits measurements to 1 minute at the A input or 10 minutes at the mA input, followed by at least 20 minutes' rest. Matching headline current ceilings does not establish matching continuous-use capability.

See the DM93-2 model at FLIR.

Read the accuracy and VFD conditions

For DC volts, the DM66 manual specifies ±(0.4% + 2 digits) on the 60.00 V range; DM93-2 specifies ±(0.05% + 1 digit) on the 40.00 V range in its base resolution table. DM93-2 requires multiplying the digits term by 10 in its higher-resolution mode. More display counts alone do not tighten the error allowance.

VFD filtering also has conditions. DM66's VFD table specifies ±(1.0% + 3 digits) from 10–100 Hz fundamental frequency; from 100–400 Hz, the percentage allowance rises linearly to 10%, still plus 3 digits. DM93-2 applies its AC accuracy in VFD mode over 40–400 Hz. Read the full DM66 and DM93-2 tables for the signal and range you need.

Another documentation conflict: the DM66 manual lists a 60.00 MΩ resistance range, while the paired datasheet prints 6.000 MΩ. Confirm the intended range with FLIR if high resistance determines your purchase. Do not silently combine the most favorable figures from different documents.

Recording: internal memory, live graphs and saved files

DM93-2's onboard automatic recorder uses selectable intervals of 1–600 seconds. The manual requires Manual Select mode for recording and directs you to Auto Range for the automatic recorder: function selection and ranging are separate settings. It warns that 1- or 2-second sampling can lose points during auto-ranging, showing dashes; it recommends a slower interval to reduce that possibility.

The automatic recorder's SEND option transfers stored data to a Bluetooth-paired phone running METERLiNK. Separately, the app manual describes recording live data in the app. An app session appears in Files after recording stops, and an unstopped app session ends after approximately 8 hours. That app behavior is separate from the meter's internal capacity.

1. 1

   Choose the recording method

   Use the meter's internal recorder for stored measurements, or start live recording in METERLiNK.

2. 2

   Finish or transfer the session

   Use SEND for the stored automatic recording; stop an app recording so it appears in Files.

3. 3

   Export a usable result

   Open the saved log and export its CSV data for a spreadsheet, or assemble and share an app report.

The app manual documents CSV export, graphical comparisons and reports with notes. The supported handoff established here is meter to mobile app to exported file; confirm any required desktop or cable workflow separately. Do not assume DM286's USB or thermal-image capabilities transfer to DM93-2.

Phone and software checklist

The METERLiNK manual specifies iOS 14.0 or later and Android 10.0 or later. Those are its documented minimums; confirm the current app can install on the actual phone before buying for connectivity. Use the METERLiNK app named by the DM93-2 manual and enable the meter's built-in Bluetooth.

For a recording session, the app manual instructs you to disable meter auto power off. Keep enough battery power for the session and the transfer. DM93-2's approximately 100-hour battery figure assumes its backlight, worklight and Bluetooth are off, so it is not a connected-recording runtime promise.

There is a range mismatch to notice: the generic app manual mentions 90 m without obstructions, but DM93-2's own manual specifies 10 m (32 ft) maximum. The generic statement does not establish that longer range for this meter. Check reception where the phone will actually be used before relying on remote monitoring.

Buying guide: confirm the box and the probe

The DM66 documents disagree about accessories, so obtain written confirmation of the exact box contents. Its manual describes a banana-plug Type K probe and an optional adapter for standard miniature Type K plugs. If temperature matters, match the probe's connector, temperature rating and intended contact surface to the job; the meter's wider range does not upgrade the probe.

For leads and clips, read their category/voltage markings and required tip protection. The DM66 manual specifically directs readers to accessory markings for rating changes. Higher-rated leads cannot establish a higher rating for the instrument.

• Yes: Confirm the model label and its matching manual
• Partly: Confirm the DM66 probe, clips and case contents in writing
• Partly: Match the temperature probe and connector to the job
• Partly: Check ratings on the meter, leads and attached clips

DM93 versus DM93-2: verify the suffix

The original DM93 appears in FLIR's 2018 catalog, with FLIR Tools Mobile and 20 000 recording points / 125 days maximum. The DM93-2 manual documents the METERLiNK app and 10,000 automatic records. Those older capacity and software claims are not specifications for the newer suffix.

Require DM93-2 on the order confirmation, instrument identification and matching manual. Both Bluetooth and METERLiNK terminology appear in the original DM93 documentation, so either word alone is insufficient. Existing DM93 owners should confirm their exact phone/software support with FLIR before buying around a new-app assumption.

How we choose

Recommendations use FLIR's official US-English manuals, datasheets and app documentation, checked November 3, 2026. We compared the exact model columns, full accuracy conditions, recording modes, accessory lists and ratings; no physical test results are presented. Conflicts remain visible. Our selection method and measurement policy explain the approach.

Verdict

Choose DM66 for routine troubleshooting and finer dedicated microamp display steps. Choose DM93-2 for internal logs and a documented mobile reporting workflow, after checking the phone and current-duty limits. If you need a thermal picture, follow the thermal multimeter route; neither meter here supplies it.