Raymarine ST900 Speed/Temp Low Profile Thru-Hull with Cable Series.

$329.99

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Model: ST900 Bronze  (13.7 m Cable) ST900 Bronze  (13.7 m Cable) ST900/P17 Plastic (10 m Cable) ST900 Plastic (20 m Cable) ST900 Plastic (13.7 m Cable)

Description

Raymarine ST900 Speed & Temperature Sensors
Low‑Profile Analog Thru‑Hull Sensors with Gen2 Paddlewheel Technology

Raymarine’s ST900 Speed and Temperature sensors combine precision engineering and AIRMAR’s new Gen2 paddlewheel design for ultra‑responsive startup and linear speed readings from 0.3 to 45 knots. Perfect for sailboats and power vessels, these low‑drag thru‑hull sensors measure speed and water temperature with exceptional accuracy while minimizing maintenance and hull resistance.

Retractable inserts with integrated valves prevent unwanted bilge water ingress during servicing. Each sensor outputs analog data compatible with Raymarine i40, i50, iTC‑5, and legacy instrument systems and retrofits directly into AIRMAR P120 and B120 housings.

Model Numbers

- ST900 Bronze – Low Profile – Model: E70686
- ST900/P17 Plastic Long Body – Retractable – Model: E70687
- ST900 Plastic (13.7 m Cable) – Model: E70673
- ST900 Plastic (20 m Cable) – Model: E70674

Key Features

- Gen2 Paddlewheel for ultra‑sensitive speed startup (accurate from 0.3 knots up to 45 knots).
- Measures speed and fast‑response water temperature (± 0.5 °C).
- Low‑profile thru‑hull construction reduces drag and cavitation.
- Retractable housing with water‑valve seal for safe maintenance afloat.
- Analog output for direct connection to Raymarine i40, i50, i60, iTC‑5, and legacy SeaTalk systems.
- Retrofits simply into AIRMAR P120 / B120 housings.

Model Comparison

Model	E70686	E70687	E70674	E70673
Housing Type	Bronze	Plastic (long body)	Plastic	Plastic
Cable Length	13.7 m	10 m	20 m	13.7 m
Mount Style	Low Profile Thru‑Hull	Retractable Thru‑Hull	Low Profile Thru‑Hull	Low Profile Thru‑Hull
Output	Analog	Analog	Analog	Analog
Retractable	Yes	Yes	Yes	Yes
Speed Range	0.3 – 45 kn	0.3 – 45 kn	0.3 – 45 kn	0.3 – 45 kn
Temp Accuracy	± 0.5 °C	± 0.5 °C	± 0.5 °C	± 0.5 °C
Hole Size	51 mm (2 in)	51 mm (2 in)	51 mm (2 in)	51 mm (2 in)
Retrofit Compatible	P120 / B120	P120 / B120	P120 / B120	P120 / B120
Operating Temp	–10 °C to 40 °C	–10 °C to 40 °C	–10 °C to 40 °C	–10 °C to 40 °C

What's In the Box

ST900 Bronze (E70686)
- Heavy‑duty construction for fiberglass and wood hulls.
- 13.7 m cable for standard SeaTalk and analog systems.

ST900/P17 Plastic (E70687)
- Retractable design with 10 m cable for easy maintenance underway.
- Ideal for compact boats or tight installations.

ST900 Plastic (20 m Cable) (E70674)
- Extended‑reach 20 m cable for larger vessels and aft helm layouts.
- Durable polymer housing resists corrosion in saltwater.

ST900 Plastic (13.7 m Cable) (E70673)
- Standard length variant with low‑profile body.
- Maintains speed linearity and precision from trolling to planing speeds.