Williams AV PLM FSMP – Hearing Loop Field Strength Meter
Williams AV PLM FSMP – Hearing Loop Field Strength Meter is backordered and will ship as soon as it is back in stock.
Shipping Availability*
Shipping Availability*
Free Ground Shipping on Most Orders Over $250.00
Looking for the best price or expert advice? Give us a call at 1-888-230-3661 or use the Live Chat below. Buying 1 or 100, you may qualify for greater savings beyond the advertised price.
Product Overview
The Williams AV PLM FSMP is a field strength meter for commissioning and verifying hearing-loop installations. It lets an installer measure the magnetic field a loop produces and confirm it meets IEC 60118-4 performance across the listening area.
Product Description
The PLM FSMP measures loop magnetic field strength so an installer can set levels correctly and document that a hearing loop delivers even, compliant coverage. Verifying field strength is a required step for IEC 60118-4 sign-off and for demonstrating a loop performs as designed. It is an essential tool for anyone installing or servicing Williams AV loop amplifiers such as the DL107 and DL210.
Key Features
- Field measurement — Reads loop magnetic field strength.
- Compliance verification — Supports IEC 60118-4 commissioning and sign-off.
- Installer tool — Sets and documents even coverage.
- Portable — Handheld for on-site testing.
Typical Applications
- Commissioning new hearing-loop installations
- Servicing and re-verifying existing loops
- Documenting IEC 60118-4 compliance
Technical Specifications
| Type | Hearing loop field strength meter |
| Purpose | Measure and verify loop field strength |
| Standard | Supports IEC 60118-4 verification |
| Warranty | Williams AV manufacturer warranty |
Full specifications: Williams AV hearing-loop products.
Frequently Asked Questions
What does the meter measure?
The magnetic field strength a hearing loop produces in the listening area.
Why is that needed?
IEC 60118-4 sign-off requires verifying the loop delivers even, compliant field strength.
Who uses it?
Installers and service technicians commissioning or checking hearing loops.
Does it work with any loop amplifier?
Yes; it measures the field regardless of which loop amplifier drives it.
Is it portable?
Yes; it is a handheld tool for on-site testing.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
CREATION NETWORKS — A PARTNER YOU CAN TRUST SINCE 2006










