Listen Technologies TFSM01 Field Strength Meter

Ensure reliable induction loop performance across security, surveillance and AV installations with the Listen Technologies TFSM01 Field Strength Meter. This compact multimeter-style test instrument is designed for B2B installers and integrators who need fast, IEC60118-4 compliant verification of loop systems during commissioning and maintenance. The TFSM01 offers three calibrated modes—weighted background noise (50 Hz–8 kHz), field strength measurement and frequency response checks (100 Hz, 1 kHz, 5 kHz)—so you can quickly identify interference, confirm required field levels and optimise speech intelligibility for hearing-impaired users.

Technicians benefit from an intuitive wide-angle LED display, colour-coded indicators and 1 dB resolution that make on-site decisions faster and more reliable. The built-in headphone output doubles as a loop listener for real-time monitoring of loop audio during adjustments. Housed in a rugged, ergonomic case and supplied with a soft carry pouch and commissioning certificate template, the TFSM01 is engineered for frequent site use across public venues, security control rooms and transport hubs.

Specify the Listen Technologies TFSM01 Field Strength Meter for dependable loop commissioning and monitoring—order one for your test kit or request a demo to see it in a live surveillance or accessibility setup.

• Rapid, repeatable induction loop commissioning: three calibrated modes (Background Noise, Field Strength, Frequency Response) let you validate IEC60118-4 compliance on site
• Clear, actionable readouts: wide-angle LED display and colour-coded LEDs provide instant pass/fail feedback to speed installations and troubleshooting
• Dual-function testing and monitoring: headphone output with volume control lets technicians listen to loop audio while measuring, reducing return visits
• Portable, rugged design: lightweight (1.2 lb) handheld meter and soft carry pouch enable efficient field work across multiple sites
• High-resolution measurements: 1 dB resolution and targeted frequency checks (100 Hz, 1 kHz, 5 kHz) ensure accurate tuning for hearing assistance and security audio systems