ELMA BM 257 True RMS (42257)
Elma Instruments

ELMA BM 257 True RMS

Part number42257EAN / GTIN5706445410293HS code9031.80
MOQ:1

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Product Description

Elma Instruments 42257 True RMS mini-multimeter with two new functions. Auto-Check is an intelligent function that automatically detects and selects AC voltage, DC voltage and continuity / resistance.

Technical Specifications

Manufacturer part number (MPN)
42257 EAN / GTIN: 5706445410293 Sales unit: pcs Package quantity: 20 pcs Current supply: Battery Measured value memory: Yes Indication: Analogue/digital Measuring range selection: Manual/automatic True RMS measurement: Yes Continuity test: Yes Isolation resistance measuring range: 0–60 MOhm Interface: No Capacitance measurement: Yes Frequency measurement: Yes With decibel measurement (dB): Yes Measurement principle: True root mean square Data hold: Yes IR interface: No Explosion-tested version: No Analogue bar graph display: Yes Resistance test/diode test: Yes Inductance measurement: No Lowest resolution, DC voltage: 0.1 mV Lowest resolution, DC current: 1 µA Lowest resolution, AC voltage: 0.1 mV Lowest resolution, AC current: 1 µA Lowest resolution, resistance: 0.1 Ohm With conductivity measurement: No Max. voltage measuring range AC: 1000 V Max. voltage measuring range DC: 1000 V Max. current measuring range, AC: 10 A Max. current measuring range, DC:

Standards & Compliance

HS Code
9031.80

Cross References

  • EAN 5706445410293
  • SAP 1000092019
  • Code 8584686

Product Documentation

Document preview: ELMA BM 257 True RMS (42257) — Specification sheet

Catalogue entry last verified: 2026-09-30. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.

Frequently asked questions

Where can I buy 42257?
42257 can be ordered from cballast.com as a Elma Instruments catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
What is the manufacturer part number for this Elma Instruments product?
The manufacturer part number is 42257.
What is the HS code for 42257?
The customs tariff (HS) code for 42257 is 9031.80.
Who manufactures 42257?
42257 is a Elma Instruments product in the Measurement & Inspection Tools range.
Is a datasheet available for 42257?
Yes — the 42257 datasheet can be viewed and downloaded on this page.
What is the minimum order quantity for 42257?
The minimum order quantity is 1.
Is 42257 available?
Yes — 42257 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).