Assistive Listening Knowledge Base
  • Manufacturer product documentation
  • Undated (read )

Loopworks Measure R2 field strength meter

From https://assistivelisteningknowledgebase.org/evidence/ampetronic-loopworks-r2/ · record checked 13 October 2026

  • Ampetronic

Manufacturer (Ampetronic, maker of Loopworks Measure and the R2 receiver)

Summary

Describes an iOS measurement app that requires an external telecoil receiver, with calibration steps and stated frequency-response and gain-stability specifications.

Key findings

  • The page states that the app runs on iOS 15 or later and supports the R2 through official Apple Lightning-to-3.5 mm and USB-C-to-3.5 mm adapters.
  • The page specifies response within ±0.25 dB from 50 Hz to 8 kHz, gain stability better than ±0.25 dB, and RMS detection with a 125 ms integration time supplied by the host device and app. It states a 400 mA/m field-strength reference.
  • The linked User Guide UP18304-07, page 6, says an R2 receiver containing a telecoil is required for any measurements, and instructs users to calibrate the receiver against the iOS device settings. Page 8 allows reviewing calibration results and recalibrating regularly or after changing the receiver.
  • The guide, pages 6-7, distinguishes simple meter operation without an account from saved data, audio recordings and guided tests requiring an account. Meter functions cover field strength, frequency response and A-weighted magnetic background noise.
  • The product page describes its combined app and receiver as the most accurate dedicated field-strength meter available, but supplies no comparative test results supporting that ranking.

Limits

Manufacturer claims; no independent comparison or full end-to-end measurement uncertainty is reported. Frequency-response flatness and gain stability do not establish total absolute field-strength accuracy. Also read the linked 35-page guide at https://www.ampetronic.com/wp-content/uploads/UP18304-07-R2_loopworks-measure-user_manual.pdf; its cover gives copyright 2015-2026 without a publication date. Hardware and platform claims describe the page read on 13 October 2026.

Read the original

www.ampetronic.com/products/loopworks-measure-receiver-field-strength-meter-r2

Link checked . We link to the original and do not host copies.

Cited in

Cite this source

Ampetronic. Loopworks Measure R2 field strength meter. n.d. https://www.ampetronic.com/products/loopworks-measure-receiver-field-strength-meter-r2/ (accessed 13 October 2026).

The original gives no date, so the citation says “n.d.”. The accessed date is when this library last checked the link; use the date you read it. To point readers to this summary instead, link to https://assistivelisteningknowledgebase.org/evidence/ampetronic-loopworks-r2/

Every finding here cites its source, and who funded each source is labelled. This site does not recommend products. Found an error or a missing study? Suggest a correction.