The ONWA NMM40-50/200T is a professional-grade Bronze Thru-Hull Transducer specifically engineered for high-durability and performance on wood and fiberglass (GRP) vessels. Unlike plastic models, the bronze housing provides the structural integrity and corrosion resistance required for heavy-duty marine environments.

The NMM40-50/200T is a 600W Dual-Frequency sensor that serves as a premium alternative to the plastic KTD-TH520. It excels in providing clear seabed imagery and precise fish detection across two frequencies.

This model features a built-in temperature sensor and a standard 6-pin connector, making it compatible with the majority of ONWA chartplotter/sounder combos. The “T” in the model name specifically denotes the inclusion of the temperature sensing function.