{"product_id":"bar-high-resolution-depthpressure-sensors-bar30-030-bar-300-m","title":"Bar High-Resolution Depth\/Pressure Sensors - Bar30 - 0–30 bar (~300 m)","description":"\u003c!-- Bar30 High-Resolution Depth\/Pressure Sensor - Collapsible Sections --\u003e\n\u003c!-- H2 = Collapsible sections, H3 = Nested subheadings --\u003e\n\n\u003cdiv class=\"bar30-product-description\"\u003e\n\n  \u003cdetails class=\"product-section\" open\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003eProduct Description\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \u003cp\u003eThe Bar30 is a compact, high-resolution pressure sensor designed for underwater depth and pressure measurement. Housed in an aluminium body with a standard bulkhead penetrator form factor, it installs quickly into watertight enclosures and is well-suited for ROVs, AUVs, and other subsea instrumentation.\u003c\/p\u003e\n      \u003cp\u003eBuilt around the Measurement Specialties MS5837-30BA sensing element, the Bar30 measures pressures up to 30 bar — equivalent to approximately 300 metres water depth. With a depth resolution of 2mm, it's an excellent choice for deep-water ROV applications and general underwater monitoring systems. The sensor also incorporates a temperature measurement function with ±4°C accuracy.\u003c\/p\u003e\n      \u003cp\u003eCommunication is via I²C interface, operating on 3.3V logic with support for up to 5.5V power input. The included JST GH connector ensures compatibility with popular flight controllers such as the Navigator and Pixhawk autopilot systems. Full electrical schematics and board layouts are open-source, allowing integration into custom designs.\u003c\/p\u003e\n      \u003cp\u003eThe Bar30 is fully compatible with ArduSub and other ArduPilot firmware variants.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The sensing element features a protective gel coating that requires drying for a minimum of 2 hours daily to maintain measurement accuracy. Extended continuous submersion may cause permanent sensor damage.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"product-section\"\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003eContents\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \u003cul\u003e\n        \u003cli\u003e1 x Bar30 Pressure Sensor\u003c\/li\u003e\n        \u003cli\u003e1 x Bulkhead O-ring (AS568-013)\u003c\/li\u003e\n        \u003cli\u003e1 x Bulkhead Nut\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"product-section\"\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003eSpecifications\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \n      \u003ch3\u003eELECTRICAL\u003c\/h3\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eSupply Voltage (Vin)\u003c\/td\u003e\n            \u003ctd\u003e2.5–5.5 V\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eI²C Logic Voltage (SDA\/SCL)\u003c\/td\u003e\n            \u003ctd\u003e2.5–3.6 V\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003ePeak Current\u003c\/td\u003e\n            \u003ctd\u003e1.25 mA\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \n      \u003ch3\u003ePERFORMANCE\u003c\/h3\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eOperating Pressure Range\u003c\/td\u003e\n            \u003ctd\u003e0–30 bar\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eOperating Depth (freshwater)\u003c\/td\u003e\n            \u003ctd\u003e0–295.6 m\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eMaximum Mechanical Pressure\u003c\/td\u003e\n            \u003ctd\u003e50 bar\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eDepth Resolution\u003c\/td\u003e\n            \u003ctd\u003e0.2 mbar (2 mm in freshwater)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eAbsolute Accuracy (0 to 45°C)\u003c\/td\u003e\n            \u003ctd\u003e±200 mbar (±2.04 m in freshwater)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eAbsolute Accuracy (-20 to 85°C)\u003c\/td\u003e\n            \u003ctd\u003e±400 mbar (±4.09 m in freshwater)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eTemperature Sensor Accuracy\u003c\/td\u003e\n            \u003ctd\u003e±4°C (absolute)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eIn-Air Operating Temperature\u003c\/td\u003e\n            \u003ctd\u003e-20 to 85°C\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eIn-Water Operating Temperature\u003c\/td\u003e\n            \u003ctd\u003e2 to 40°C\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \n      \u003ch3\u003ePHYSICAL\u003c\/h3\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eWeight in Air\u003c\/td\u003e\n            \u003ctd\u003e14 g\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eBulkhead Thread\u003c\/td\u003e\n            \u003ctd\u003eM10 x 1.5\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eInstallation Hole (Clearance)\u003c\/td\u003e\n            \u003ctd\u003e10.0–10.2 mm\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eInstallation Hole (Tapped)\u003c\/td\u003e\n            \u003ctd\u003eM10 x 1.5\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eStorage Temperature\u003c\/td\u003e\n            \u003ctd\u003e-40 to 85°C\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eMaximum Continuous Submersion\u003c\/td\u003e\n            \u003ctd\u003e24 hrs (must dry for 2+ hrs daily)\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \n      \u003ch3\u003eINTERFACE\u003c\/h3\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n            \u003ctd\u003eI²C\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eI²C Address\u003c\/td\u003e\n            \u003ctd\u003e0x76\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eConnector\u003c\/td\u003e\n            \u003ctd\u003e4-position JST GH\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eArduSub Compatible\u003c\/td\u003e\n            \u003ctd\u003eYes\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"product-section\"\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003ePinout\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003ePin\u003c\/th\u003e\n            \u003cth\u003eWire Colour\u003c\/th\u003e\n            \u003cth\u003eFunction\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e1\u003c\/td\u003e\n            \u003ctd\u003eRed\u003c\/td\u003e\n            \u003ctd\u003eVin (2.5–5.5V)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e2\u003c\/td\u003e\n            \u003ctd\u003eGreen\u003c\/td\u003e\n            \u003ctd\u003eSCL (I²C Clock)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e3\u003c\/td\u003e\n            \u003ctd\u003eWhite\u003c\/td\u003e\n            \u003ctd\u003eSDA (I²C Data)\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e4\u003c\/td\u003e\n            \u003ctd\u003eBlack\u003c\/td\u003e\n            \u003ctd\u003eGND\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n      \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e I²C lines operate at 3.3V logic. Use a level converter if interfacing with 5V microcontrollers.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"product-section\"\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e2D Drawings\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \u003cp\u003eTechnical drawings are available for download.\u003c\/p\u003e\n      \u003cp\u003e\u003ca href=\"#\"\u003eDownload 2D Drawing (PDF)\u003c\/a\u003e\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"product-section\"\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003e3D Models\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \u003cp\u003e3D model files are available for integration into your designs.\u003c\/p\u003e\n      \u003cp\u003e\u003ca href=\"#\"\u003eDownload Bar30 3D Model (.zip)\u003c\/a\u003e\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails class=\"product-section\"\u003e\n    \u003csummary\u003e\u003cspan style=\"color: rgb(255, 128, 0);\"\u003eGuides\u003c\/span\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"section-content\"\u003e\n      \n      \u003ch3\u003eQuick Start\u003c\/h3\u003e\n      \u003cp\u003e\u003cstrong\u003e⚠️ Important:\u003c\/strong\u003e The Bar30 is not fully waterproof on its own. While the sensing face is sealed for water exposure, the rear side where wires exit is not sealed. A proper watertight seal is only achieved when the bulkhead is correctly installed through an enclosure or mounting surface.\u003c\/p\u003e\n      \u003col\u003e\n        \u003cli\u003eConnect the JST GH connector (or bare wires) to your microcontroller. If your board uses 5V logic, a level converter is required for the I²C lines:\n          \u003cul\u003e\n            \u003cli\u003e\n\u003cstrong\u003eRed:\u003c\/strong\u003e 2.5–5.5V power\u003c\/li\u003e\n            \u003cli\u003e\n\u003cstrong\u003eGreen:\u003c\/strong\u003e SCL (3.3V logic)\u003c\/li\u003e\n            \u003cli\u003e\n\u003cstrong\u003eWhite:\u003c\/strong\u003e SDA (3.3V logic)\u003c\/li\u003e\n            \u003cli\u003e\n\u003cstrong\u003eBlack:\u003c\/strong\u003e Ground\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/li\u003e\n        \u003cli\u003eInstall the sensor in your enclosure using the M10 bulkhead thread and included O-ring.\u003c\/li\u003e\n        \u003cli\u003eUse the available code libraries to interface with the sensor.\u003c\/li\u003e\n      \u003c\/ol\u003e\n      \n      \u003ch3\u003eDevelopment Libraries\u003c\/h3\u003e\n      \u003cul\u003e\n        \u003cli\u003e\u003ca href=\"#\"\u003eMS5837 Arduino Library\u003c\/a\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"#\"\u003eMS5837 Python Library\u003c\/a\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"#\"\u003eArduPilot MS5xxx Driver\u003c\/a\u003e\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \n      \u003ch3\u003eResources\u003c\/h3\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003ca href=\"#\"\u003eBar30 Sensor Guide\u003c\/a\u003e — Installation, wiring and setup instructions\u003c\/li\u003e\n        \u003cli\u003e\n\u003ca href=\"#\"\u003ePressure-to-Depth Calculator\u003c\/a\u003e — Convert pressure readings to water depth\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"#\"\u003eMS5837-30BA Datasheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"#\"\u003eBar30 Schematic (PDF)\u003c\/a\u003e\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n\u003c\/div\u003e","brand":"Blue Robotics","offers":[{"title":"Default Title","offer_id":53222831521952,"sku":"BR-100586","price":135.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/6662\/2880\/files\/BAR30-SENSOR-R2-RP.jpg?v=1771741354","url":"https:\/\/www.spotx.com.au\/products\/bar-high-resolution-depthpressure-sensors-bar30-030-bar-300-m","provider":"Spot X Underwater Vision","version":"1.0","type":"link"}