Fluke Multimeter and Clamp Meter Guide: Ranges, CAT Ratings and Which Tool to Buy
A Fluke multimeter or clamp meter is the right first tool only if its measurement functions and safety category match the circuit in front of you. Manu’s current Fluke assortment is compact field gear — digital multimeters, clamp meters, a T5-600 OpenJaw tester, non-contact voltage testers, a socket/breaker kit, and leads — not a bench calibrator line. The ranges and CAT ratings below are taken from the live product pages. Where a listing disagrees with itself, that conflict is called out instead of being smoothed over.
Multimeter vs clamp meter vs OpenJaw tester
A digital multimeter (DMM) uses test leads for voltage, resistance, continuity and, on most of these models, current through the meter’s jacks. A clamp meter measures current by closing a jaw around a conductor, so you do not open the circuit. The Fluke T5-600 sits in between: it is a 600 V voltage, continuity and current tester with an OpenJaw opening listed at 0.5 inch and 100 A AC, not a full clamp meter and not a full DMM.
| Model | Type | Key ranges on the listing | Safety rating on the listing | Price |
|---|---|---|---|---|
| Fluke 117/323 kit | True-RMS 117 DMM + 323 clamp, C115 case | 117: AC/DC voltage and AC/DC amps; LoZ to help reject ghost voltage. 323: 400 A AC and 600 V AC/DC | See the 323 row for the clamp’s CAT rating; use each instrument within its own rating | $450.29 |
| Fluke 115 | True-RMS DMM, 6,000-count, LED backlight | Voltage and current (true-RMS), diodes, frequency, continuity, capacitance, Min/Max/Average. Listing also mentions a 4 mm silicone lead set and a 9 V battery | CAT III 600 V | $249.52 |
| Fluke 17B+ | DMM | AC/DC voltage to 1,000 V, current to 10 A, plus temperature, frequency and duty cycle (the features the 15B+ listing does not add) | CAT III 600 V | $188.09 |
| Fluke 15B+ | DMM | AC/DC voltage to 1,000 V, current to 10 A, resistance, continuity, diode, capacitance | CAT III 600 V | $114.98 |
| Fluke 323 | True-RMS clamp | 400 A AC (the page states it does not measure DC current), 600 V AC/DC, resistance to 4 kΩ, 30 mm jaw | IEC 61010-1; CAT IV 300 V and CAT III 600 V | $190.87 |
| Fluke 302+ | Clamp, 30 mm jaw | 400 A AC, 600 V AC/DC. The page says this model is for everyday work where true-RMS accuracy is not required | The listing references CAT IV and CAT III (confirm the exact voltages on the tool and in the manual) | $149.49 |
| Fluke 301D/ESP | Slim AC/DC clamp | 600 A AC/DC; also listed for voltage, resistance, continuity, frequency, capacitance and diode. Thin jaw listed at 10 mm | CAT III 300 V — a lower voltage category than the 323 | $155.63 |
| Fluke T5-600 | OpenJaw tester | 600 V AC/DC, 100 A AC, continuity (less than 25 Ω), resistance to 1,000 Ω, 0.5" jaw, auto-ranging, two AA batteries | CAT III 600 V | $162.18 |
If you already know you need both a LoZ true-RMS DMM and a 400 A AC clamp, the 117/323 kit is the bundled path (it replaces the older 117/322 kit and includes the C115 case). If you only need a DMM, the 115 is the true-RMS 6,000-count option; the 15B+ and 17B+ are the 1,000 V / 10 A pair, with the 17B+ adding temperature, frequency and duty cycle. If you only clamp current, do not buy the 301D for a 480 V industrial feeder — its listed rating is CAT III 300 V. The 323’s listed rating is CAT IV 300 V / CAT III 600 V.
There is also a listing titled Fluke 325 ($364.12). The title and style field describe a 325 with frequency, temperature and capacitance, but the body text currently reads like a Fluke 323 (including the “323-AMZN” wording and a 400 A / 600 V / 4 kΩ feature set). Do not treat that page as a reliable 325 specification until the description is corrected. The standalone 323 page is the consistent source for 323 ranges.
Non-contact testers, sockets and leads
A non-contact voltage (NCV) tester is a first check, not proof that a circuit is de-energized. The Fluke 2AC ($43.11) is listed with a clear 90–1,000 V AC detection range, a glowing tip, Voltbeat-style self-test, and a battery-check button. The Fluke 1AC II ($28.73) title says 90–1,000 V AC and CAT IV, but the same page also says 90–600 V AC for a 1AC-AI-II variant and, in another paragraph, 90–1,000 V or 200–1,000 V AC. Until that listing is consistent, read the range printed on the tester itself.
The ST120+ ($25.12) checks outlet wiring with LEDs and has a GFCI test button and a switchable beeper. The BK120 SmartTrace ($83.15) is a breaker finder with a receiver (also used as an NCV detector) and a transmitter. For leads, the TL175 TwistGuard ($45.22) has 2 mm tips, removable 4 mm lantern tips, and listed ratings of CAT II 1,000 V, CAT III 1,000 V and CAT IV 600 V, 10 A. A separate Fluke test-lead listing on the store has many kit variants (electronics, industrial, automotive and others) at different prices; if you open that page, select the exact kit name rather than assuming every variant is a TL81A deluxe set.
The 117/323 kit title mentions a TPAK. The standalone TPAK hanging kit ($55.90) lists compatibility with Fluke 50 II, 70 III, 80 IV and 180-series multimeters, while the 115 page says that meter is compatible with ToolPak. If you need a hanger for a 115 or 117, confirm the fit on those pages rather than assuming every DMM takes the same magnet.
Electrical safety
Match the meter’s listed CAT rating and voltage to the system. A CAT III 300 V clamp (the 301D) is not interchangeable with a CAT III 600 V / CAT IV 300 V clamp (the 323). Do not use a tester above the rating printed on it. An NCV glow is not a substitute for measuring voltage with a meter, and a meter reading is not a substitute for lockout/tagout. Inspect leads for worn insulation — the TL175 page describes a WearGuard indicator for that reason — and test the instrument on a known live source, then on the circuit, then on the known source again. Keep one hand behind your back when practical, and never open a clamp around a bare conductor you cannot see clearly.
FAQ
Do I need a true-RMS meter?
Yes, if you measure non-linear loads (variable-frequency drives, computers, LED lighting). The 115, 117 and 323 listings are true-RMS. The 302+ listing says it is for everyday work where true-RMS accuracy is not required.
Will the Fluke 323 measure DC current?
No. Its product page states that it does not measure DC current. It does measure 400 A AC and 600 V AC/DC. For a 600 A AC/DC clamp in this assortment, see the 301D, and stay within its CAT III 300 V rating.
What is the difference between the 15B+ and the 17B+?
Both are listed for AC/DC voltage to 1,000 V, current to 10 A, and a CAT III 600 V rating. The 17B+ page adds temperature, frequency and duty cycle. The 15B+ is the lower-priced of the two at $114.98 vs $188.09.
What is the return policy?
Returns are accepted within 30 calendar days of delivery. Manu does not charge a restocking fee. For a change-of-mind or other customer-initiated return, you pay return shipping. If the item is wrong, defective, or damaged because of an error, different return-shipping terms apply under the Refund Policy. For questions, contact Manu in San Antonio, TX 78253.
