Depth Finder with In-Hull Transducer | No-Drill Mount | Made by SAIYANG Factory

Keywords: depth finder with in-hull transducer, in-hull fish finder, shoot-through transducer depth sounder, marine electronics manufacturer, SAIYANG Marine

Product Introduction: Professional In-Hull Transducer Depth Finder – Factory Direct

SAIYANG Marine is a direct manufacturer of marine fish finders and depth sounders. This depth finder with in-hull transducer (also known as a shoot-through transducer) offers outstanding performance for locating fish and identifying bottom features – without drilling holes in your boat.

How it works:
The transducer mounts to the inside of a solid fiberglass hull and transmits/receives sonar signals through the hull material. This innovative design eliminates:

Drilling holes in the hull (no leak risks)

Removing the boat from water for installation

Protrusions under the boat (reduces drag)

Important notes:

Requires solid fiberglass hull (cored hulls need special modification)

External transom-mount sensors needed for sea temperature or speed readings (if desired)

✅ Best for: Boat owners who want professional fish finding capability without permanent hull modifications.

Key Features (Factory Specifications)

Feature	Description
Transducer Type	In-hull (shoot-through) – mounts inside hull
Installation	No drilling, no hull protrusions, boat can stay in water
Display	High contrast & brightness adjustment – suitable for bright light and night use
Technology	Advanced DSP high-image supersonic digital processing
Performance	Low blind spot, high resolution echo, full quick sampling (shows every fish)
Frequency	Dual frequency display
Design	Professional, beautiful, fashionable, delicate, durable
Language	Multi-language menu display
Stability	Stable performance – comparable with foreign brand products

Why Choose SAIYANG as Your In-Hull Depth Finder Manufacturer?

✅ Factory Direct Pricing & Support
We manufacture in-house. No middlemen means wholesale prices, custom OEM options, and direct factory technical support.

✅ No-Drill Installation Advantage
Our in-hull transducer design eliminates holes in your hull and keeps your boat in the water during installation – a major convenience for boat owners.

✅ Superior Fish & Bottom Imaging
Advanced DSP processing delivers low blind spots and high-resolution echoes. Full quick sampling ensures every fish is shown clearly.

✅ Built for All Lighting Conditions
High contrast and brightness adjustment work perfectly in both bright sunlight and complete darkness.

✅ Comparable Quality
Performance and stability are comparable with foreign brand products – at factory-direct prices.

Technical Specifications (Factory Data Sheet)

Contact our factory team for complete specifications and installation guides.

Parameter	Details
Transducer Type	In-hull / shoot-through (solid fiberglass hull required)
Display Adjustment	High contrast & brightness
Processing	Advanced DSP digital supersonic processing
Frequency	Dual frequency display
Features	Low blind spot, high resolution, full quick sampling
Menu	Multi-language
Design	Professional, durable, fashionable

Applications

Fishing Boats & Sportfishers – Find fish without drilling holes in your hull.

Recreational Boats – Add fish finding capability with minimal installation hassle.

Center Consoles & Bay Boats – Ideal for fiberglass hulls where owners avoid hull penetrations.

Small Commercial Vessels – Reliable depth and fish information without underwater protrusions.

Optional Transducers (Compatible Models)

Contact us for transducer matching based on your hull type and fishing needs.

Inquiry & Factory Contact

Looking for a reliable in-hull transducer depth finder manufacturer? Need wholesale pricing or customization for your boat brand or fleet?

Contact SAIYANG Marine today for:

Latest factory-direct price

Bulk/wholesale quotes

Custom/OEM options

Installation guidance

📞 Send us a message using the form below – please include: quantity, hull type (solid fiberglass or cored), and any special requirements. Our marine electronics engineer will reply within 24 hours.

 

 

Technical parameters：

Model	FP621S
TX Frequency	50&200KHz
Output Power	300W-600W
TXRate	0.12~3.0ms
Accuracy	0.1m
Sensitivity	-95dBm
Alarm	Depth,Voltage,Temperature
Language	Simplified Chinese, English, Traditional Chinese
Display Unit
Display Mode	Dual frequency,Single frequency (high or low freq.), A-scope, Zoom(high or low freq.)
Expansion Mode	Auto Expansion,Manual Zoom,Bottom Lock
TXRate	7 steps(stop,1/8,1/4,1/2,1/1,2/1,3/1)
Color	Echo color:5 color schemes Background color：black, blue
Interface
Input data	IEC61162-1(NMEA0183)RMC, GLL
Output data	IEC61162-1(NMEA0183)DPT, DBT(After GLL and RMC Input)
Serial port to print	Suitable for printer DPU-414
Power Supply	DC 24V(11-35V)
Environmental
Operating temperature	-10℃~+40℃ Compliance with IEC60945 standard
Working humidity	10~90%

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