Airmar TM275LHW dual-channel CHIRP transducer with Low CHIRP 42–65 kHz and High-Wide 150–250 kHz, delivering a constant 25° beam. Transom-mount design with temperature sensor and 12 m cable, compatible with Furuno DFF1-UHD, FCV295 and FCV1150. Read more.
The AIRMAR TM275LHW is a high-performance dual-channel CHIRP depth and temperature transducer, designed for vessels requiring both deep-water capability and wide-beam high-frequency coverage. It integrates Low CHIRP (42–65 kHz) for maximum depth penetration and High-Wide CHIRP (150–250 kHz) with a constant 25° beamwidth, delivering exceptionally broad water-column coverage and superior target separation. Paired with the Furuno DFF1-UHD CHIRP module, the TM275LHW provides true broadband capability far beyond traditional fixed-frequency systems.
The High-Wide (HW) channel achieves over six times the coverage of standard 200 kHz transducers, making it ideal for detecting bait schools, pelagic species and mid-water targets. For deep-water performance, the Low CHIRP channel maintains strong bottom tracking and detailed structure return. The TM275LHW is also compatible with Furuno FCV295 and FCV1150 variable-frequency fish finders, preserving the full 25° beamwidth across the entire high-frequency CHIRP band. A 12-meter cable without connector is provided for direct termination to CHIRP modules or sounder terminals.
Dual-channel CHIRP technology: Low CHIRP (42–65 kHz) for depth; High-Wide CHIRP (150–250 kHz) for broad water-column coverage.
Constant 25° HF beamwidth: Wide, uniform coverage at all high-frequency CHIRP settings.
Enhanced target separation: Ideal for bait identification, mid-water targets and fish-school detection.
Deep-water capability: Low-frequency CHIRP ensures reliable bottom tracking at depth.
Optimized for Furuno DFF1-UHD: Full broadband CHIRP performance.
FCV295 & FCV1150 support: Compatible with variable-frequency sounders.
Integrated temperature sensor: Accurate water-temperature readings for fishing applications.
12 m cable (no connector): Allows direct wiring into CHIRP modules or terminals.
TM275LHW Dual-Channel CHIRP Transducer
Broadband CHIRP transducer featuring Low CHIRP and High-Wide CHIRP ceramic elements within a hydrodynamic transom-mount housing. Includes an integrated water-temperature sensor.
Transom-Mount Bracket & Hardware
Complete mounting assembly designed to maintain proper alignment and stable acoustic performance across different speeds and hull types.
12 m Cable (Unterminated)
A factory-fitted, marine-grade cable without connector for direct wiring into DFF1-UHD, FCV295 or FCV1150 terminals.
CHIRP Channels:
– Low CHIRP: 42–65 kHz
– High-Wide CHIRP: 150–250 kHz (constant 25° beam)
Material: Reinforced polymer housing
Mounting: Transom mount
Cable: 12 m, no connector
Sensors: Water temperature
Primary Functions: Depth sounding, fish detection, wide-beam target coverage
Full CHIRP support with:
– Furuno DFF1-UHD (Broadband CHIRP)
– Furuno FCV295 (variable frequency)
– Furuno FCV1150 (variable frequency)
Not compatible with:
– TZtouch3 / TZtouchXL / TZtouch2 without a CHIRP module
Cable termination:
– Must be wired directly due to no connector supplied.
TM275LHW transom-mount CHIRP transducer
Transom mounting bracket and stainless hardware
12 m unterminated cable
Installation documentation
Install the transducer on the transom where water flow is clean and free of turbulence, away from strakes, steps and thru-hull fittings. Correct bracket alignment is essential to maintain stable sonar performance across multiple speeds. Route the cable through a watertight pass-through and wire it directly to the CHIRP module or sounder terminal. Proper grounding and noise isolation are recommended to achieve the clearest CHIRP returns.
The adjustable transom-mount bracket allows the transducer to be aligned across a typical transom-angle range of approximately 2° to 22°, ensuring the transducer face sits level in the water. Proper alignment during installation is essential for optimal acoustic performance.
