How to Pick the Right Testing Gear for Your Team: A Buyer's Checklist (FLIR, Fluke & More)

If you're the person who handles equipment orders for a team of engineers or maintenance techs, you know the drill: everyone wants the latest tool, but you need to justify the spend. Last year alone, I processed over 70 equipment requests — thermal imagers, calipers, multimeters, you name it. The most frustrating part? Vendors who claim one tool does everything. They don't. Here’s a checklist I now use to sort through the noise.

When This Checklist Works

Use this when you're evaluating a mix of electrical and mechanical inspection tools — specifically thermal cameras, digital calipers, and multimeters. It's built for buying decisions where you need to balance capability, budget, and ease of use. I've organized it into 6 steps. Follow them in order, and you'll avoid the mistakes I made my first two years.

Step 1: Map the Tool to the Job (Don’t Assume Universal)

Everything I'd read about "multifunction tools" said they save money. In practice, I found the opposite: a jack-of-all-trades often does none of them well. For example:

• Thermal imaging (FLIR A50/A70, M200, One Pro): best for detecting heat anomalies in electrical panels, building envelope leaks, or drone-based inspections. Not for measuring capacitance or precise dimensional checks.
• Digital calipers (like a 24″ / 600mm model): for mechanical measurements — shaft diameters, gap widths, PCB dimensions. Don't use them to test capacitors.
• Multimeters (e.g., Fluke 87V or 117): for voltage, resistance, and yes — capacitance testing. That's where the how to test a capacitor with a fluke multimeter skill comes in.

The conventional wisdom is to buy one brand for everything. My experience with 30+ vendors suggests that specialists beat generalists every time. FLIR owns thermal; Fluke owns electrical measurement. Let them be experts where they belong.

Step 2: Pick the Right FLIR Model (Don’t Overbuy)

This is where most of the budget goes. Here's the breakdown I give my team:

FLIR A50 / A70 Smart Sensor

Fixed-mount cameras for continuous monitoring — think electrical substations, production lines, or server rooms. They integrate with SCADA or IoT platforms. According to FLIR's specifications (verified December 2024), the A50 offers 320×240 resolution; the A70 gives you 640×480. If you only need periodic spot checks, skip these — they're overkill.

FLIR M200 Thermal Camera

This one goes on drones (DJI Matrice 200 series). Great for rooftop solar panel inspection or large-area search & rescue. But if your team doesn't fly drones, save the money. (Should mention: the M200 is IP44 rated, so it can handle light rain, but not submersion.)

FLIR One Pro (iOS)

This is a phone attachment — 160×120 resolution, works with iPhone. It's handy for quick walkarounds, but the image quality is lower than handheld units. Our maintenance lead called it "useful for triage, not for reports." If you need professional documentation, go with a standalone model like the FLIR E8.

Step 3: Verify the Vendor’s Capability — and Honesty

When I took over purchasing in 2020, I ordered a "comprehensive inspection kit" from a single supplier. Turned out the thermal camera was a Chinese rebrand with no warranty support in the US. The vendor who sold it said they could service it — but when it failed, they ghosted us. Cost us $2,400 in rework and lost rental fees.

Now I ask three questions before any order over $500:

1. “Is this your core product category?” If they say “we do everything,” I’m wary. I'd rather hear “FLIR is our specialty — for multimeters, we recommend Fluke.” That honesty earns my trust for the rest.
2. “What’s your return policy for DOA units?” Dead-on-arrival happens. A vendor with a clear RMA process is worth a premium.
3. “Can you provide an invoice that matches our accounting requirements?” I learned this the hard way: a handwritten receipt got my expense report rejected. Always verify invoicing capability up front.

Step 4: Get Hands-On (or Virtual) Before You Commit

You can't judge ergonomics from a spec sheet. Our team tested three thermal cameras side by side: the FLIR A70, a competitor’s unit, and an older FLIR E series. The A70's touchscreen interface was a game-changer — techs could scroll through temperature data without a manual. The competitor's camera had better resolution on paper, but the menu was so slow they never used it.

Seeing those three side by side made me realize: usability trumps raw specs when the tool will be used daily. Same for the 24″ digital calipers: we ordered two models, and the one with a larger display and auto-off feature won because it survived a week on the shop floor.

Step 5: Test the Capacitor Function on Your Multimeter (Even If You Don't Need It Now)

One of the most common requests I get is “how to test a capacitor with a fluke multimeter.” The process itself is simple:

1. Disconnect power and discharge the capacitor safely.
2. Set the dial to capacitance (usually a “–|(–” symbol).
3. Insert leads — red into µA/mA jack, black into COM.
4. Read the value. If it's near zero or OL (overload), the capacitor is bad.

But here's the catch: not all Fluke models measure capacitance. The 87V does; the 117 doesn't. When I ordered 10 multimeters for our team, I assumed they all had the same features. (Should mention: I didn't check the data sheet until after they arrived.) Saved $200 per unit but lost the functionality. Now I always keep a reference table of model capabilities.

Step 6: Watch Out for These 3 Common Mistakes

1. Assuming “24″ digital caliper” means 24 inches of range. It does — but some models read in inches/metric with frustrating toggles. Make sure the display is readable and the jaws are long enough for your parts.
2. Ignoring software compatibility. FLIR's A50/A70 need a gateway or server to stream data. If your IT team hasn't approved the network setup, the camera sits in a box.
3. Forgetting calibration certificates. For ISO-compliant work, you need a traceable calibration report. Ask the vendor if they include it — many charge extra.

After 5 years of managing these purchases, I've learned one thing: a vendor that tells you what they don't do is more valuable than one who promises the world. That's why I split my orders — FLIR for thermal, Fluke for electrical, and a specialty caliper brand for precision measurement. Every tool does its job, and I sleep better knowing our team has the right gear for each task.