1 5

BarXT Extended Submersion Depth/Pressure Sensors

BarXT Extended Submersion Depth/Pressure Sensors

Ocean Robotix Pvt Ltd

BarXT Extended Submersion Depth/Pressure Sensors

100 in stock

The BarXT series provides accurate underwater depth and pressure sensing for applications that require continuous submersion. These sensors can stay submerged indefinitely with no maintenance. Available in four models for operating depths from 20 to 1000 meters.

Sensor - Operating Pressure Range
Rs. 39,900.00
Rs. 39,900.00
Sale Sold out
SKU: BR-103242-003
  • Free Shipping Globally
  • Try it Risk-Free for 90 Days
  • FDA Cleared
View full details

Product Description

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:

Model Operating Range Approximate Depth Resolution
Bar3XT 0–3 bar 20 m 0.091 mbar (0.9 mm)
Bar10XT 0–10 bar 100 m 0.31 mbar (3.12 mm)
Bar30XT 0–30 bar 300 m 0.92 mbar (9.36 mm)
Bar100XT 0–100 bar 1000 m 3 mbar (31 mm)
BarXT Extended Submersion Depth/Pressure Sensors - Description Image

Performance Under Pressure

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.

  • 1 x BarXT Pressure Sensor based on selection
  • 1 x M10 bulkhead O-ring
  • 1 x Bulkhead nut
Model Bar3XT Bar10XT Bar30XT Bar100XT
Electrical
Supply Voltage (Vin) 2.5–5.5 V 2.5–5.5 V 2.5–5.5 V 2.5–5.5 V
I²C Logic Voltage (SDA and SCL) 1.8–3.6 V 1.8–3.6 V 1.8–3.6 V 1.8–3.6 V
Typical Current 1.5 mA 1.5 mA 1.5 mA 1.5 mA
Idle Current 100 nA 100 nA 100 nA 100 nA
Performance
Operating Temperature -10 to 80°C
Maximum Mechanical Pressure1 12 bar 40 bar 120 bar 400 bar
Operating Pressure 0–3 bar 0–10 bar 0–30 bar 0–100 bar
Operating Depth2 0–20 m 0–92 m 0–296 m 0–1009 m
Accuracy (0.15 % FS) ± 4.5 mbar (±0.046 m in freshwater) ± 1.5 mbar (±0.153 m in freshwater) ± 4.5 mbar (±0.046 m in freshwater) ± 150 mbar (±1.54 m in freshwater)
Total Error Band (0–50°C) (0.7% FS)3 ± 21 mbar (±0.21 m in freshwater) ± 70 mbar (±0.72 m in freshwater) ± 210 mbar (±2.15 m in freshwater) ± 700 mbar (±7.16 m in freshwater)
Resolution 0.091 mbar (0.09 m in freshwater) 0.31 mbar (31.2 mm in freshwater) 0.92 mbar (9.36 mm in freshwater) 3 mbar (31 mm in freshwater)
Long Term Stability (typ.) ± 3 mbar ± 10 mbar ± 30 mbar ± 100 mbar
Pressure Type PA: Sealed pressure, 1 bar absolute reference pressure
Temperature Accuracy (typ.) ± 2°C ± 2°C ± 2°C ± 2°C
Temperature Resolution 0.0031°C 0.0031°C 0.0031°C 0.0031°C
Physical
In Air Weight (No Nut) 32 g
In Water Weight (No Nut) 27 g
Bulkhead O-ring Size AS568-013 Buna N 70A
Bulkhead Thread M10 x 1.5
Installation Hole (Port) Size – Clearance 10.0–10.2 mm
Installation Hole (Port) Size – Tapped M10 x 1.5
Bulkhead / Plug Material Stainless steel 316L, black oxide coated
Wetted Materials Stainless steel 316L, black oxide coated
Buna N
Viton
Molycote 111
Interfacing
ArduSub Compatible Yes
Development Libraries KellerLD-Arduino
KellerLD-Python
KellerLD-Autopilot
I²C Address 0x40
Connector 4-position JST GH
Mating Connector (4-pos JST GH available on Digi-Key)
Connector Pinout 1 - Red - Vin
2 - Green - SCL
3 - White - SDA
4 - Black - GND

1 Maximum mechanical pressure is the highest pressure the sensor can withstand before permanent damage.
2 Depth values assume 1 bar atmospheric pressure and freshwater density (1000 kg/m³); actual values vary.
3 TE₍B₎ (Total Error Band): Maximum deviation under specified pressure and compensated-temperature range.

BarXT Extended Submersion Depth/Pressure Sensors - Drawing 1

19 August 2025

  • BR-101752 RevB – Discontinued
  • BR-103242-100, Bar100XT – Initial release
  • BR-103242-030, Bar30XT – Initial release
  • BR-103242-010, Bar10XT – Initial release
  • BR-103242-003, Bar3XT – Initial release
  • Updated bulkhead design
  • Keller 7LD changed to 4LD

13 June 2023

  • BR-101752 RevB – Initial release
  • Bulkhead material changed from PEEK to stainless steel with black oxide coating
  • Overall length reduced by 5 mm
  • Minor bulkhead design changes

30 January 2023

  • Minor revision
  • -013 O-ring color changed to blue

29 April 2022

  • R3 – Initial release
  • 4-pos DF13 connector changed to 4-pos JST GH connector

22 September 2020

  • R2 – Initial release
  • Updated bulkhead design

31 August 2017

  • R1 – Initial release