Manufacturer: Simarine
Manufacturer part number: STR2
Simarine STR2 Radar Tank Sensor for NMEA 2000 Networks
With the Simarine STR2 Radar Tank Sensor, you can elevate fluid level management on your yacht or in your caravan to a new level. Designed for modern onboard systems, this sensor sends precise measurement data directly to the NMEA 2000 backbone.
Contactless Micro-Radar Technology
The STR2 does not use prone-to-failure floats or moving parts within the medium. It is simply glued to the top of the plastic tank and measures the distance to the liquid surface with high precision via radar – directly through the closed plastic lid! No drilling below the fill line is required.
-
Insensitive to interference: Deposits, foam, vapors, or condensation do not falsify the radar readings.
-
Versatile: Perfectly suited for fresh water, grey water, black water (holding tanks), and fuels such as diesel or gasoline.
Seamless NMEA 2000 Integration (Plug & Play)
The sensor is a full NMEA 2000 node (PGN 127505) and is simply plugged into the existing backbone of your onboard network via its integrated cable. Complex wiring or an expensive converter are completely eliminated. This allows tank data to be read centrally on compatible multifunction displays (MFDs), chartplotters, or digital displays in the cockpit.
Smart Calibration via Bluetooth
Assigning tanks (e.g., "Fresh Water Tank 1" or "Starboard Diesel Tank") and calibration has never been easier. The sensor is equipped with Bluetooth and can be wirelessly configured using the free Simarine App. Basic calibration (Full/Empty) is done automatically. For asymmetrical tanks or tanks adapted to complex hull shapes, the app also offers manual multi-point calibration.
The "Simarine Connect" app works on Android version 11 and above, and iOS version 12.2 and above.
(Note: The radar sensor measures flawlessly through plastic. For metal tanks, a special, separately available flange adapter (S5) with an integrated viewing window is required so that the radar can look into the tank).
5. Technical Data
This table is ideal for the specifications tab at the bottom of the page:
| Property | Specification |
| Model | STR2 (Digital NMEA 2000 Version) |
| Measurement Principle | Contactless micro-radar (shoots vertically downwards) |
| Suitable Liquids | Water, grey water, black water (feces), fuels |
| Mounting | Glued to plastic tanks (measures through the plastic). An adapter is required for metal tanks. |
| Measurement Range (Tank Height) | 150 mm to 2000 mm |
| Power Supply | 8 – 30 V DC (via the NMEA 2000 network) |
| Current Consumption | approx. 20 mA (at 12 V) |
| Digital Signal Outputs | NMEA 2000 (PGN 127505) |
| Analog Signal Outputs | None (For analog outputs, see the sister model STR1) |
| Wireless Connection | Bluetooth (for live data and settings via Simarine App) |
| Dimensions (Ø x H) | 62 mm x 32 mm |
| Connection | NMEA 2000 Micro-C connector |
Also available: STR1 Sensor with data output for analog displays and Bluetooth. Compatible with most displays. Perfect integration into the Simarine PICO system.