The BarXT pressure sensor series is designed for underwater applications where sensors need to remain submerged for extended periods without maintenance. They’re ideal for ROVs, AUVs, and other subsea instrumentation in long-term deployments where reliability is important.

BarXT sensors use the M10 bulkhead penetrator form factor machined from 316 stainless steel, coated with black oxide to reduce galvanic corrosion, and feature a front cover that protects the sensing element from physical damage. BarXT is built to handle harsh marine environments and extended missions.

The BarXT line uses the Keller 4LD series sealed pressure and temperature sensor, and includes four models to cover a range of depths and resolutions:

All BarXT models also measure temperature, accurate to ±2 °C. They communicate via I²C, operate on 3.3 V logic (with 5.5 V max power input), and come with a JST GH connector compatible with most flight controllers, like the Navigator Flight Controller and Pixhawk autopilot.

They are fully supported in ArduSub, and we provide Arduino and Python libraries for simple integration into your projects. The electrical schematic and board layout are also provided, so you can adapt the design to your own projects.

If you’re looking for a more budget-friendly option, the Bar series sensors provide accurate depth and pressure for intermittent submersion applications. And if you need a temperature sensor with even more accuracy, try out the Celsius Temperature Sensor.