Capteur ST850 Vitesse Température NMEA 2000 avec passe-coque P17

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Airmar

44-164-1-01

ST850 NMEA 2000 Speed/Temperature Sensor with P17 Through-Hull Fitting

null

Retail priceBenefit from the professional rate

$455.00 USD

Shipping calculated at checkout.

Low stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Cable length	6
Data Refresh Rate	1
Hull Material Compatibility	Fibre de verre, Métal
Mounting type	Passe-coque
Operating voltage	9-16
Sensor type	Vitesse, Température
Speed Measurement Range Knots	2 à 45
Through Hull Model	P17
Weight	0.7
Wired network	NMEA 2000

Detailed description

Conçu pour les réseaux NMEA 2000, le capteur AIRMAR ST850 offre une mesure précise de la vitesse et de la température de l'eau. Ce transducteur traversant à profil bas intègre la technologie Smart™ Sensor, traitant les signaux directement pour une transmission de données simplifiée via un câble unique. Avec sa conception rétractable et un passe-coque en plastique P17, il est adapté aux coques en fibre de verre ou en métal.

Performance et Intégration

Le ST850 transmet les données de vitesse et de température à un taux de 1 Hz, couvrant une plage de vitesse de 2 à 45 nœuds. La précision de la température est de ±0.5°C sur une plage de -10° à 40°C. Son interface NMEA 2000 assure une connectivité plug-and-play avec les équipements électroniques marins modernes. Le capteur nécessite une alimentation de 9 à 16V DC et génère 17 000 impulsions par mille nautique.

Conception et Maintenance

Ce modèle AIRMAR se distingue par son insert rétractable, facilitant l'entretien de la roue à aubes et minimisant l'entrée d'eau grâce à une valve intégrée lors du retrait. Son profil bas, ne dépassant que de 5 mm de la coque, réduit la traînée. Il est compatible avec un trou de montage de 51 mm et peut remplacer des transducteurs Airmar existants tels que les B617V, P617V, SS617V, P217, P314 ou ST650, offrant une solution de mise à niveau pratique. Le câble NMEA 2000 certifié de 6 mètres est inclus.

Expert opinion

« Technical analysis of the AIRMAR ST850 sensor for NMEA 2000 network »

The AIRMAR ST850 sensor is a technical solution for acquiring speed and water temperature data on vessels equipped with an NMEA 2000 network. Its "Smart™ Sensor" design is a major asset, as it integrates processing intelligence directly into the transducer body, simplifying wiring and integration into the onboard network. For installations where hydrodynamic performance is a key criterion, its low profile—extending only 5 mm beyond the hull—is a notable advantage, reducing drag compared to more prominent models.

The retractable insert is particularly useful for preventive maintenance. It allows easy cleaning of the impeller without removing the boat from the water, a common use case to prevent fouling and maintain speed measurement accuracy. The integrated valve minimizes water entry during this operation, ensuring both safety and convenience. This sensor is ideal for cruising sailboats or mid-sized powerboats seeking a reliable and easy-to-maintain solution, compatible with NMEA 2000 standards.

Its ability to fit existing Airmar housings (B617V, P617V, SS617V, P217, P314, ST650) also makes it a relevant option for upgrading older installations, avoiding complex hull modifications. It is important to note that, while robust for its category, the P17 plastic through-hull fitting must be installed carefully on fiberglass or metal hulls, following drilling and sealing procedures to ensure long-term reliability.

Durabilité

Facilité d'installation

Rapport performance / prix

Payment and security

Your payment information and data are processed securely.

ST850 NMEA 2000 Speed/Temperature Sensor with P17 Through-Hull Fitting

$455.00 USD

Frequently Asked Questions

Need help? Contact us

What does the AIRMAR ST850 transducer measure?

The AIRMAR ST850 transducer is designed to precisely measure two essential parameters for navigation: water speed and water temperature.

What is the speed range that the ST850 sensor can measure?

The ST850 transducer can measure water speed over a range from 2 to 45 knots.

What is the temperature measurement accuracy of the ST850 sensor?

The temperature measurement accuracy of the ST850 sensor is ±0.5°C, over an operating range of -10°C to 40°C.

How frequently does the ST850 transducer transmit data?

The ST850 transducer transmits speed and temperature data at a rate of 1 Hz, meaning an update every second.

What is the Smart™ Sensor technology integrated into the ST850?

The Smart™ Sensor technology integrated into the ST850 allows the sensor to process signals directly inside the transducer. This simplifies data transmission via a single NMEA 2000 cable, eliminating the need for external interface boxes.

Is the ST850 transducer resistant to underwater drag?

Yes, the ST850 transducer has a low-profile design that protrudes only 5 mm from the hull. This design minimizes hydrodynamic drag and reduces underwater disturbances.

What are the required mounting hole dimensions for the ST850 transducer?

The ST850 transducer requires a 51 mm diameter mounting hole in the hull for installation.

Is the ST850 sensor supplied with a connection cable?

Yes, the ST850 sensor is supplied with a certified NMEA 2000 cable 6 m long, ready for connection to your onboard network.

What is the power consumption of the AIRMAR ST850 sensor?

The AIRMAR ST850 transducer requires a direct current (DC) power supply between 9 and 16 volts. It is optimized for 12VDC systems.

Is the ST850 transducer easy to maintain?

Yes, the ST850 transducer has a retractable insert. This design simplifies maintenance of the impeller and minimizes water entry into the hull via an integrated valve when the insert is removed.

For which hull types is the P17 through-hull fitting suitable?

The P17 through-hull fitting supplied with the ST850 transducer is specifically designed for fiberglass or metal hulls.

How does the ST850 sensor connect to my boat's network?

The ST850 sensor connects directly to your boat’s NMEA 2000 network via its built-in NMEA 2000 interface and the supplied 6-meter cable, providing plug-and-play connectivity.

What happens if I need to remove the ST850 sensor insert while the boat is in the water?

The ST850 sensor is designed with an integrated valve that minimizes water ingress into the hull when the retractable insert is removed for maintenance, even when the boat is afloat.

Is the ST850 sensor compatible with modern marine electronic systems?

Yes, the ST850 sensor is fully compatible with modern marine electronic systems thanks to its NMEA 2000 interface, which ensures plug-and-play connectivity.

Can I replace an old Airmar transducer with the ST850?

Yes, the ST850 transducer is designed as a practical upgrade solution. It can replace existing Airmar transducers such as models B617V, P617V, SS617V, P217, P314, or ST650.

Is the ST850 sensor compatible with all NMEA 2000 multifunction displays?

Yes, as an NMEA 2000 sensor, the ST850 is designed to be compatible with all multifunction displays and instruments that support the NMEA 2000 protocol for displaying speed and temperature data.

Does the ST850 transducer require a separate interface box to connect to the NMEA 2000 network?

No, the ST850 sensor integrates Smart™ Sensor technology, meaning it processes signals directly and connects natively to the NMEA 2000 network without requiring an additional interface box.

How many pulses per nautical mile does the ST850 sensor generate?

The ST850 transducer generates 17,000 pulses per nautical mile, ensuring precise measurement of distance traveled.

Can the ST850 sensor be used with non-NMEA 2000 systems?

No, the ST850 sensor is specifically designed for NMEA 2000 networks and transmits its data via this protocol. It is not directly compatible with non-NMEA 2000 systems.