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The LATNEX MF-30K is a handheld AC/DC gaussmeter for reading magnetic flux density in a prepared, nonhazardous bench setup.[1] That is a narrower buying proposition than “industrial tester” or “calibration instrument.”[1] The useful question is whether its documented ranges, probe-based display, storage functions, and source limitations fit your reference measurements—not whether the meter can certify a process or prove a magnet’s holding force.[1]
What the MF-30K is for
LATNEX describes the MF-30K as an AC/DC gaussmeter with automatic ranging, DC north/south polarity display, relative, peak-hold and real-time-zero functions, data hold, maximum/minimum hold, and selectable gauss or tesla units.[1] The manual identifies DC measurement with N/S display and AC measurement from 40–500 Hz, and lists residual fields, magnetic applications, steel materials, motors, permanent magnets, and leakage from superconductive magnets among its stated applications.[2]
For a buyer, that supports a static-bench use case such as comparing a prepared magnet or fixture at a consistently documented probe position. It does not establish probe-axis geometry, a three-axis measurement, position-independent results, dimensional fit, or a particular field at a particular distance. The manual’s Hall-probe illustration shows placement, but the supplied evidence does not provide a certified 3D geometry or a universal placement recipe.[2]
Ranges and accuracy: read the table, not the headline
The manual gives DC ranges of 300.00 mT at 0.01 mT resolution and 2000.0 mT at 0.1 mT resolution, with a published reading-relative error formula of ±(4% of the reading + 10 display counts) at 23°C ±5°C and relative humidity below 80%. Its 2000.1–3000.0 mT row is marked N/A. The corresponding gauss rows are 3000.0 G at 0.1 G and 20,000 G at 1 G with the same stated accuracy, while 20,001–30,000 G is marked N/A.[2] In other words, the manual does not give one uniform error claim across the full 3000 mT/30,000 G ceiling.
The AC table is separate: it lists 150.00 mT at 0.01 mT and 1500.0 mT at 0.1 mT, plus 1500.0 G at 0.1 G and 15,000 G at 1 G, with a published AC error formula of ±(5% of the reading + 20 display counts) under the same 23°C ±5°C and relative-humidity-below-80% test conditions.[2] The retail record literally says “DC up to 30000 Gauss or 30000mT,” unlike the maker and manual’s 0–3000 mT / 0–30000 G ceiling. Its AC “15000 Gauss or mT” wording is also ambiguous. These are conflicting source statements, not interchangeable units.[3] Treat the manual’s named rows as the buying reference and ask the seller to resolve any model or revision discrepancy before relying on a limit.
Logging, controls, and power
The LATNEX product record lists 200 manual records, automatic 6000-record logging with an interval set on a PC, USB transfer, and PC application software.[1] The manual instead describes automatic recording of up to 7000 logs and says the interval is set with a PC.[2] That is a material source conflict, not a reason to pick the larger number. Plan around the documented discrepancy, and confirm the supplied software and current-host compatibility if computer logging matters. The manual names Windows 7 and 10 and describes a supplied CD/driver path. Its program text says “Thermometer Meter,” while the pictured icon says “Magnetic Meter.” None of this establishes a current Windows 11 download, tested installation, or working host connection.[2]
The manual lists six 1.5 V AAA batteries, a DC 9 V adapter, an AC/DC magnetic probe, carrying case, USB cable, and installation disk as accessories.[2] The standard product page independently lists six AAA batteries and a 5–40°C operating range.[1] A separate LATNEX aluminium-case record should be treated as a distinct package record, not merged with the standard package.[4]
What the documentation does not prove
- Not a holding-force gauge. Flux density in gauss or tesla is not a force reading. No claim here says the MF-30K accepts a clamp, pull, or retention-force test.
- Outside this review’s scope. The editorial boundary excludes human-exposure assessment, medical or MRI conclusions, diagnosis, live-circuit work, and electrical-safety acceptance.
- Not automatic process acceptance. A GO/NO-GO alarm and production-testing language are listed by the seller, but that does not create a validated acceptance limit for your process.[1]
- Not proof of traceability. An observed retail listing says “Calibration Certificate included,” but it does not identify an individual serial-number certificate, uncertainty, laboratory, or NIST traceability in the supplied record.[3]
Buy or skip?
Buy if you need a handheld reference meter for static magnetic-field comparisons, can define and repeat your probe placement independently, and are comfortable treating the manual’s range table and source conflicts as part of the purchase decision. Before ordering, confirm the exact package, the probe, the manual revision, the applicable AC/DC band, and what “certificate” means for the individual unit.
Skip if you need a certified measurement system, a force measurement, a documented multi-axis field map, a guaranteed 30,000 G or 3000 mT accuracy claim, or current PC software with confirmed host compatibility. The available packet does not establish those capabilities.
As an Amazon Associate I earn from qualifying purchases.
Check the exact LATNEX MF-30K offer on Amazon.
Sources
Source provenance: this source-based review uses LATNEX’s product record and linked HB4MF30K0000 manual, the selected Amazon listing, and a separate LATNEX aluminium-case listing. The manual contains 19 physical PDF pages, including covers, contents and a blank page; it does not establish the revision shipped with an individual order. The manual and retail records contain conflicts; those conflicts are retained rather than reconciled by assumption.