Conditional verdict: Consider the Triplett SFM500 for a trained user’s defined non-contact static-voltage comparison on suitable, known reference objects. Its documented method depends on a ground reference and a one-inch sensing distance.[1][2] Manual records, peak displays and alarms may suit that task, but the readings are not a field map, charge measurement, human-exposure assessment or ESD compliance verdict. The selected ordinary offer is B0DKQF6D7M.[4]
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What it measures
The maker describes non-contact measurement of electrostatic charge on a body or object; the manual identifies the displayed quantity as static voltage in kV under a specified sensing geometry.[1][2] Do not interpret that as tesla, volts per meter, charge in coulombs, spatial field distribution, ionizer balance or a health-and-safety determination. Documenting the reference object and applicable method is part of interpreting the number.
The maker page, datasheet headline and ordinary listing give −19.000 to +19.000 kV.[1][3][4] The manual and datasheet specification instead give −19.999 to +19.999 kV; the manual introduction has a separate 0.010–20.000 kV wording.[2][3] These are unresolved source fields, not one silently reconciled universal range. The headline’s literal “2.54c” remains malformed; the manual and specification explicitly state one inch, 2.54 cm.[1][2][3]
Ground reference and geometry are method requirements
The manual requires grounding, a one-inch sensing distance and ceramic spacers beside the sensor, with a warning about electric-shock risk near the sensor.[2] Those are purchase-changing requirements to assess through the complete manual and competent safety support, not details removed by a non-contact label. This review does not supply a ground-point, electrical-socket, wiring, wrist-strap, charging or discharge procedure, and no physical test was performed.
The datasheet and retail description list the protective sensor cover, 9V battery, ground wire with alligator clip and carrying case.[3][4] The manual’s introductory accessory list is shorter, but its operating section also identifies the grounding wire as an accessory; a shorter list is not proof that the wire is absent.[2] The wrist strap is expressly not an accessory, while this review has not verified shipment of the ceramic spacers.[2] Confirm the applicable exact package where it determines whether your method is possible.
Controls and manual records
The specification describes a 19,999-count LCD, 0.001 kV resolution and sampling twice per second; the datasheet says 500 ms.[2][3] These are published display and sampling figures, not achieved uncertainty or repeatability. The stated error is ±(5% + 10 digits), without an established reading-versus-full-scale basis in the reviewed sources.[2][3] Do not silently add that missing qualification.
HOLD freezes the displayed value; +PEAK and −PEAK track high and low values, and ZERO changes the reference reading.[1][2] The documented memory stores and recalls up to 99 manually recorded readings.[2][3][4] None of those descriptions establishes automatic logging, a PC interface, timestamps or retention after loss of power. Independent notes can preserve object, geometry and method context; they are not a calibration certificate.
Operating limits and care
The manual specifies indoor use, 5–40°C operation, less than 80% RH, altitude up to 2,000 m and Pollution Degree 2, with warnings against flammable gas and humid environments.[2] It also labels EMC Class B while using “other than domestic” wording.[2] That unresolved wording does not establish general residential suitability, and this review does not invent a broader home-use prohibition.
The sources describe a 9V battery, low-battery indication, about 100 hours of life, and automatic power-off after about 15 minutes, with a disable option. The manual's passage saying six new 9V batteries conflicts with the single-battery specification; do not turn it into a buyer procedure. [2][3]
Package, price, and warranty cautions
The datasheet and ordinary offer list the protective cover, 9V battery, ground wire/alligator clip and case; the manual separately lists the meter, manual, alkaline 9V battery and case.[2][3][4] Treat them as documented package statements, not an inspected carton. The wrist strap remains a separate item and actual ceramic-spacer delivery is unverified.[2]
Warranty wording differs: the datasheet says two years, while the retail description says one.[3][4] Resolve the applicable seller terms rather than assuming a revision timeline or promising either period. Historical price and stock snapshots are not delivery or current-availability guarantees.
Who should buy—and who should skip
Consider it when a trained buyer already has an appropriate static-control or laboratory reference-object method and needs standalone readings with manual recall.[1][2] HOLD, peaks, alarms, backlight and the tripod mount are documented controls, not a hands-on ease-of-use or time-saving result.[1][3] Consistent reference geometry and competent handling remain separate from the display’s digit count.
Skip it when the essential requirement is contact voltage testing, automatic distance measurement, computer logging, an independently verified unit certificate, ESD compliance proof or human-exposure assessment. Also pause a range-, accessory- or warranty-dependent purchase until its particular source discrepancy is resolved. The SFM500 is a method-bound reading instrument, not a plug-and-play safety system.
The buying decision
Shortlist SFM500 for a defined reference-grounded static-voltage comparison with the documented geometry and manual-record controls. Keep the exact configuration and warranty conditional; do not turn a displayed value or alarm into a universal property or safety certification.[1][2][4]
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Sources
Based on the current exact maker page, linked 11-physical-page manual and one-page datasheet, plus the selected ordinary offer.[1][2][3] The manual has a cover, contents and blank ending page; its printed content labels are two lower than physical indices.[2] These records do not establish the shipped revision, actual certificate or seller warranty for a unit.[2][4]