Brymen

BM869s High-Performance Industrial Multimeter

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A 500,000-count CAT IV 1000 V meter with 0.02% basic DC accuracy, dual display, AC+DC True-RMS, VFD filtering and dual-temperature inputs.

Score
7.3/10
Est. life
12 yrs
Cover
1 yr
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Product Overview

Brymen's BM869s is its top-resolution industrial handheld. It offers a 500,000-count high-resolution mode, 0.02% basic DC accuracy, a dual backlit display and a 41-segment bar graph refreshing at 60 times per second. AC and AC+DC True-RMS bandwidth reaches 100 kHz, while VFD filtering, 1 ms crest ca...

$235.00

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Specifications

OverviewBrand
Brymen
OverviewProduct category
multimeters-and-electrical-testers
OverviewExpected lifespan
12 years · We Buy It For Life editorial estimate
Warranty & ServiceWarranty
12 months · Warranty
Additional detailsBasic DC accuracy
±0.02% + 2 digits

Why We Love It

The features that make this product stand out from the competition.

Handheld metrology depth

The 500,000-count mode and 0.02% basic accuracy expose changes ordinary 6,000-count meters cannot.

Wide-band True RMS

AC+DC sensing and 100 kHz bandwidth suit power electronics and non-sinusoidal signals.

Protected input design

CAT IV 1000 V construction, HRC fuses and BeepJack address foreseeable connection errors.

Detailed Quality Score Breakdown

Core Performance

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Feature Richness

7.6

The exact product provides dual temperature, VFD filtering, crest capture, 4-20 mA percentage, dBm and optional USB.

Longevity

Serviceability

Value

Total Cost of Ownership Calculator

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Buy box purchase price$235.00

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$1.37 / month

$16.49

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$197.90

Over 12 years

Calculation: (Purchase Price + Total Maintenance - Resale Value) ÷ Lifespan

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Frequently Asked Questions

Does the BM869s really offer a 500,000-count display?

Yes. The BM869s has a selectable 500,000-count stable mode for single-display DC-voltage ranges, with 5-4/5-digit resolution. This mode updates at about 1.25 readings per second; the normal 50,000-count mode is faster at about five readings per second.

How does the BM869s measure variable-frequency-drive output?

The Model 869s provides VFD ACV + Hz and VFD Hz + ACV functions. Brymen describes these as using a low-pass filter and a noise-rejection frequency algorithm to measure a drive’s fundamental voltage and frequency. The manual notes that the default 500 V range can be changed when sensitivity or noise performance requires it.

Can the BM869s catch brief voltage or current spikes?

Yes. Its CREST mode is an instantaneous peak-hold function for capturing positive and negative peaks on supported voltage and current ranges. The manual specifies capture of signal durations as short as 1 millisecond and a 5,000-count resolution; Auto-Power-Off is disabled while this mode is active.

How is the BM869s used for a 4–20 mA loop?

In its DC milliamps function, the BM869s can show loop current as a percentage for externally powered process-control loops. The scale is defined as 4 mA = 0% and 20 mA = 100%, with 0.01% resolution. The manual identifies this as a simultaneous loop-current percentage reading.

What capacitance range does the BM869s cover?

The BM869s offers capacitance ranges from 50 nF through 25 mF. Brymen highlights its fast measurement of large capacitances, while the manual warns that capacitors must be discharged before testing and that large-value capacitors should be discharged through an appropriate resistance load.

Why does the BM869s include an nS conductance function?

Conductance is the inverse of resistance, expressed as S = 1/Ω. On the BM869s, the nS function effectively extends resistance measurement toward the gigaohm order, which Brymen identifies as useful for leakage measurements. Do not use resistance or continuity modes on a live circuit, because readings can be false and the meter may be damaged.

How does automatic power-off affect the BM869s?

The BM869s normally powers off after about 17 minutes without activity to extend battery life. Rotary-switch or button use, significant readings above 9% of range, and non-OL resistance readings count as activity. Auto-Power-Off is disabled automatically during MAX/MIN/AVG recording and CREST capture.

Can the BM869s measure logic-level frequency and duty cycle?

Yes. The BM869s includes a logic-level Hz function covering 5 Hz to 1 MHz, with a stated accuracy of 0.002% + 4 digits and 2.5 Vp square-wave sensitivity. Its duty-cycle function covers 0.1% to 99.99% for 5 V logic-family inputs, with the manual specifying a 5 Hz to 500 kHz input-frequency range.

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