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I’m comparing the Fluke 17B+ and the Fluke 15B+, two digital multimeters that are incredibly popular with beginners and hobbyists. Both measure AC/DC voltage up to 1000V and current up to 10A, but the 17B+ adds a few extra tricks that might be worth the difference for you.
This comparison is for anyone who wants a reliable, safe Fluke without spending a fortune. The big question is whether you need the temperature and frequency functions of the 17B+, or if the simpler 15B+ has everything you’ll actually use. Let me walk you through the specs so you can decide.
🏆 Quick Picks — My Top Recommendations
Best Overall: Fluke 17B+
Includes temperature testing up to 400°C and frequency measurement for more advanced troubleshooting — Check Price →
Runner-Up: Fluke 15B+
Saves you money while still giving you essential functions like voltage, current, resistance, and capacitance — Check Price →
Here’s a side-by-side look at the real specs so you can see exactly what each Fluke multimeter brings to the table.
Full Specs Comparison
| Specification | Fluke 17B+ Digital Multim | Fluke 15B+ Digital Multim |
|---|---|---|
| Brand | Fluke | Fluke |
| Style | Digital Multimeter | Digital Multimeter |
| Power Source | Battery Powered | Battery Powered |
| Color | Yellow | Yellow |
| Weight | ✅ 470 g | 460 g |
| Safety Rating | ✅ CAT III 600V | CAT III 600V |
| Max AC/DC Voltage | ✅ 1000V | 1000V |
| Max Current | ✅ 10A | 10A |
| Resistance | ✅ Yes | ✅ Yes |
| Continuity | ✅ Yes | ✅ Yes |
| Diode Testing | ✅ Yes | ✅ Yes |
| Capacitance | ✅ Yes | ✅ Yes |
| Frequency | ✅ Yes | — |
| Temperature | ✅ Yes | — |
For me, the biggest difference is that the Fluke 17B+ includes temperature measurement up to 400°C and frequency testing, which the Fluke 15B+ completely skips.
Individual Product Breakdown
I spent time digging into the specs and real-world reviews for both of these Fluke multimeters. Here’s my honest take on each one to help you pick the right tool for your bench.
Fluke 17B+ Digital Multimeter
1000V AC/DC | 10A Current | Temperature up to 400°C | 470 g
- CAT III 600V Safety Rating: Ensuring your safety when working on electrical...
- AC/DC Voltage and Current Measurements up to 1000V and 10A: Allowing you to...
- Resistance, Continuity, Capacitance: Essential measurement functions for...
If you want the most features for your money without stepping up to a pro-level meter, the Fluke 17B+ is my pick. It adds frequency measurement and temperature testing up to 400°C using the included K-type thermocouple, which the cheaper 15B+ simply doesn’t have. With a CAT III 600V safety rating and a 4.8-star average from 796 reviews, it’s built to last and safe for residential and light commercial work. The only downside is you’re paying a bit more for those extra functions, but if you ever need to check a furnace or motor frequency, you’ll be glad you have them.
✅ Pros
- Includes temperature measurement up to 400°C with a K-type thermocouple
- Measures frequency for motor and signal troubleshooting
- CAT III 600V safety rating for reliable protection
- Rated 4.8 out of 5 stars from 796 customer reviews
❌ Cons
- More expensive than the 15B+ for features many beginners won’t use
- Heavier at 470 g compared to some compact meters
Fluke 15B+ Digital Multimeter
1000V AC/DC | 10A Current | Resistance & Capacitance | 460 g
- CAT III 600V Safety Rating: Ensuring your safety when working on electrical...
- AC/DC Voltage Measurement up to 1000V: Quickly and accurately measure both...
- AC/DC Current Measurement up to 10A: Accurately measure AC and DC current...
The Fluke 15B+ is the smart choice if you just need the basics done right and want to save some cash. It covers all the essential functions for beginners — AC/DC voltage up to 1000V, current up to 10A, plus resistance, continuity, diode, and capacitance testing. It’s a hair lighter than the 17B+ at 460 g and still carries that same CAT III 600V safety rating. The trade-off is you lose frequency and temperature measurement, so if you don’t plan on working with HVAC systems or motor drives, this meter is all you’ll ever need.
✅ Pros
- Lower cost while keeping all essential measurement functions
- Slightly lighter at 460 g for easier handling
- Rated 4.8 out of 5 stars from 832 reviews
- CAT III 600V safety rating for peace of mind
❌ Cons
- No temperature measurement or frequency testing
- Does not include a K-type thermocouple in the box
Which One Should You Buy?
Honestly, both of these meters are excellent, so your choice really comes down to what you plan on working with. If you never touch a furnace or a motor, you can save some money; if you want to be ready for anything, the extra features are worth it.
Fluke 17B+ Digital Multimeter is right for you if…
- You need to troubleshoot HVAC systems and want temperature measurement up to 400°C with the included K-type thermocouple.
- You work with variable frequency drives or motors and need the frequency measurement function.
- You’d rather have the extra capability now than wish you’d bought a more advanced meter later.
Fluke 15B+ Digital Multimeter is right for you if…
- You’re a beginner focused on basic electrical work like measuring voltage up to 1000V, current up to 10A, and checking continuity.
- You want the trusted Fluke build quality and CAT III 600V safety rating without paying for features you won’t use.
- You’re on a tighter budget and need to spend less while still getting a top-rated meter with 4.8 stars from 832 reviews.
❌ Who Should Skip All of These?
If you need to measure high-end industrial signals like millivolt transducers or need a true-RMS meter for non-linear loads, neither of these entry-level Flukes is the right tool. You’d be better off looking at the Fluke 87V or a similar pro-grade meter.
For the vast majority of beginners and home enthusiasts, my recommendation is the Fluke 17B+. The temperature and frequency functions are genuinely useful extras that cost very little more, and you won’t outgrow this meter as quickly.
Frequently Asked Questions
Which is better for a beginner, the Fluke 17B+ or the Fluke 15B+?
For a true beginner who just wants to check voltage, continuity, and resistance around the house, I’d point you to the Fluke 15B+. It covers all the essential functions — AC/DC voltage up to 1000V, current up to 10A, and capacitance — and you’ll save some money. The Fluke 17B+ is better if you think you’ll eventually get into HVAC or motor work and want temperature measurement up to 400°C and frequency testing built in from day one.
Is the Fluke 17B+ worth the extra money over the 15B+?
In my opinion, yes — if you have any plan to use those extra features. The Fluke 17B+ adds a K-type thermocouple for temperature measurement up to 400°C and frequency measurement that the 15B+ simply doesn’t have. If you never touch a furnace, oven, or motor drive, you won’t miss those functions, and the 15B+ is the smarter buy. But if you’re even slightly curious about those applications, the extra cost is absolutely worth it.
Do both multimeters have the same safety rating?
Yes, both the Fluke 17B+ and the Fluke 15B+ share a CAT III 600V safety rating. That means they’re both perfectly safe for common residential and commercial electrical work. You’re getting the same level of protection regardless of which one you choose.
Which meter has better customer reviews?
They’re almost identical in customer satisfaction. The Fluke 17B+ holds a 4.8 out of 5 stars rating from 796 reviews, while the Fluke 15B+ also holds a 4.8 out of 5 stars from 832 reviews. You really can’t go wrong with either one based on what other buyers are saying.
Does the Fluke 15B+ measure temperature?
No, it does not. The Fluke 15B+ is limited to voltage, current, resistance, continuity, diode, and capacitance testing. If you need to measure temperature, you have to step up to the Fluke 17B+, which includes a K-type thermocouple and can read up to 400°C.
Which Fluke multimeter is lighter and easier to handle?
The difference is tiny. The Fluke 15B+ weighs 460 g, and the Fluke 17B+ weighs 470 g. That’s only a 10-gram difference, so you won’t notice it in your hand. Both feel practically identical in terms of size and portability.
My Final Verdict
The Fluke 17B+ is my clear winner. It gives you temperature measurement up to 400°C with a K-type thermocouple and frequency testing, all for a modest increase over the 15B+. If you’re a beginner who wants a meter you won’t outgrow, this is the one to buy. The Fluke 15B+ is still a fantastic runner-up for anyone who only needs the basics and wants to save a few bucks.
If you’re on the fence, ask yourself this: will you ever need to check a furnace, an oven, or a motor drive? If the answer is even a maybe, get the 17B+. If you’re strictly doing outlet checks and continuity testing, the 15B+ has everything you need.
WINNER: Fluke 17B+ Digital Multimeter
- CAT III 600V Safety Rating: Ensuring your safety when working on electrical...
- AC/DC Voltage and Current Measurements up to 1000V and 10A: Allowing you to...
- Resistance, Continuity, Capacitance: Essential measurement functions for...
Best for beginners who want temperature and frequency capability from day one. You get a CAT III 600V safety rating and a 4.8-star review score from 796 buyers.
RUNNER-UP: Fluke 15B+ Digital Multimeter
- CAT III 600V Safety Rating: Ensuring your safety when working on electrical...
- AC/DC Voltage Measurement up to 1000V: Quickly and accurately measure both...
- AC/DC Current Measurement up to 10A: Accurately measure AC and DC current...
Best for budget-minded beginners who only need voltage up to 1000V, current up to 10A, and continuity. It’s lighter at 460 g and has a 4.8-star rating from 832 reviews.
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