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Williams AV PLM FSMP PROLOOP FSM Plus Magnetic Field Strength Measuring Device

SKU: PLM-FSMP MPN: PLM FSMP Williams AV

Special Order: typically 2–6 weeks

Ships directly from the manufacturer. This is an estimated lead time, not a guaranteed delivery date.

Availability can change and lead times may be longer. If your project has a deadline, check with us before ordering.

A member of our team will check with the manufacturer and personally reply by email.

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Key Features

  • Ensures IEC 60118-4 compliance for hearing loop installations, helping integrators certify performance and reduce callbacks
  • Real-time monitoring with 3.5 mm headphone jack and color-coded display for fast on-site diagnostics and verification
  • RMS-calibrated measurement (400 mA/m = 0 dB) for accurate, repeatable field strength readings during commissioning and maintenance
  • Switchable A-weighted filter and two test ranges to separate background noise from loop field strength for precise tuning
  • Lightweight, ergonomic design with low-battery indicator for reliable use by AV, security and facilities teams in the field

Quick Specifications

Product Model
WSPLMFSMP
Brand Name
Williams AV
Product Name
Hearing Loop Field Strength Meter
Product Type
Strength Meter
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Product information

PLM FSMP

Overview

Deliver consistent assisted-listening performance and simplify commissioning with the Williams AV PLM FSMP PROLOOP FSM Plus magnetic field strength measuring device. This hearing loop field strength meter is built for AV integrators, security and facilities managers who need IEC 60118-4 compliant verification, reliable monitoring and fast on-site troubleshooting. The unit provides RMS-measured readings calibrated to 400 mA/m = 0 dB, a switchable A-weighted filter and two test ranges so you can isolate background noise from true loop field strength. A color-coded display and a 3.5 mm headphone jack enable quick diagnostics and real-time audio monitoring for accurate tuning during installation and maintenance. Lightweight and ergonomically designed, the PLM FSMP reduces installer fatigue and supports repeatable documentation for accessibility and safety audits. Use it to commission induction loops in auditoriums, security checkpoints, transportation hubs and public venues where clear assisted listening is essential. For dependable verification and streamlined maintenance of hearing loop systems—order the Williams AV PLM FSMP today or contact your sales rep to integrate it into your monitoring and security workflow.

Features

  • Ensures IEC 60118-4 compliance for hearing loop installations, helping integrators certify performance and reduce callbacks
  • Real-time monitoring with 3.5 mm headphone jack and color-coded display for fast on-site diagnostics and verification
  • RMS-calibrated measurement (400 mA/m = 0 dB) for accurate, repeatable field strength readings during commissioning and maintenance
  • Switchable A-weighted filter and two test ranges to separate background noise from loop field strength for precise tuning
  • Lightweight, ergonomic design with low-battery indicator for reliable use by AV, security and facilities teams in the field
6 of 6 specifications
Technical specifications for Williams AV PLM FSMP PROLOOP FSM Plus Magnetic Field Strength Measuring Device
General Information
Brand Name Williams AV
Manufacturer Williams AV
Product Name Hearing Loop Field Strength Meter
Product Type Strength Meter
Product Model WSPLMFSMP
Manufacturer Part Number PLM FSMP

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SKU:
PLM-FSMP
Manufacturer part:
PLM FSMP
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Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.

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What should I know about returns?

Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.

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Williams AV PLM FSMP PROLOOP FSM Plus Magnetic Field Strength Measuring Device

PLM FSMP

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