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Blue Sea Systems 1821 Universal Temperature Sensor

Manufacturer

Blue Sea Systems

<p>When electrical reliability can mean the difference between a successful voyage and a dangerous situation, marine professionals and enthusiasts turn to Blue Sea Systems. Founded in 1992, this American manufacturer has built a reputation for creating electrical components specifically engineered to withstand the unforgiving marine environment. Every product reflects a commitment to safety standards and real-world performance that has made Blue Sea Systems a leading name in marine and specialty vehicle electrical systems.</p> <h3>Engineering for the Marine Environment</h3> <p>Blue Sea Systems develops and manufactures dependable AC and DC electrical products for marine and specialized vehicle applications, designed in the USA and engineered to excel in challenging environments. The marine environment presents unique challenges—salt spray, constant vibration, temperature extremes, and moisture exposure—that can quickly degrade inferior electrical components. Blue Sea Systems addresses these challenges through careful material selection, rigorous testing protocols, and designs that prioritize both safety and serviceability. Their components are engineered for marine use and align with the intent of ABYC E-11: AC and DC Electrical Systems on Boats and relevant USCG electrical regulations.</p> <h3>Commitment to Safety Standards</h3> <p>Safety standards aren't just guidelines for Blue Sea Systems—they're fundamental to every product design. All Blue Sea Systems marine battery disconnect switches comply with the ABYC C-7 certification, demonstrating their commitment to meeting and exceeding industry safety requirements. The company maintains ABYC-certified employees across multiple departments, from engineering to technical support, ensuring deep expertise in marine electrical system design and installation standards.</p> <h3>Comprehensive Product Range</h3> <p>Blue Sea Systems offers an extensive catalog designed to address every aspect of marine electrical systems. Their <a href="/7262-blue-sea-systems-circuit-breakers-200260">circuit breakers</a> provide resettable overcurrent protection with trip-free designs and clear trip indication for quick diagnostics. For power management, their <a href="/7262-blue-sea-systems-battery-switches-manual-200149">battery switches</a> offer reliable methods for controlling battery banks and disconnecting loads during storage or emergencies, with ABYC C-7 compliance guaranteed.</p> <p>Monitoring system health is critical aboard any vessel, which is why their <a href="/7262-blue-sea-systems-battery-monitors-volt-meters-200146">battery monitors and volt meters</a> provide accurate real-time data to help operators make informed decisions about power usage and charging. The company's <a href="/7262-blue-sea-systems-terminal-blocks-bus-bars-201059">terminal blocks and bus bars</a> create organized, serviceable connection points that simplify installation and future modifications. For keeping batteries properly charged, Blue Sea Systems offers <a href="/7262-blue-sea-systems-battery-chargers-200141">battery chargers</a> engineered with features like automatic charging relay compatibility and proper charge profile management.</p> <h3>Built by Boaters, for Boaters</h3> <p>Blue Sea Systems was founded based on a commitment to create innovative high quality marine electrical products to improve the safety, simplicity, and reliability of boating, with employees who are active boaters applying their passion to designing, developing, and building products. This firsthand experience translates into practical features like modular layouts, standardized footprints, and installer-centric designs that streamline panel work and serviceability. The result is a product line that addresses real challenges faced on the water, backed by comprehensive technical documentation and support resources that help both professionals and DIY enthusiasts complete installations with confidence.</p>

Part Number

1821
06/01/2036 3:07 PM
Sale Price

$14.30

4 left at this price

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Blue Sea Systems 1821 Universal Temperature Sensor provides accurate temperature monitoring for marine electrical systems. This waterproof sensor is designed for use with Blue Sea Systems P12 Battery Chargers, M2 OLED, and Mini OLED digital meters, enabling real-time temperature tracking of batteries, engines, and other critical components.

Key Features:

  • Wide temperature range: -40°F to 300°F (-40°C to 150°C)
  • Waterproof design for harsh marine environments
  • 18-inch wire length for flexible installation
  • Includes double-sided mounting tape for easy installation
  • Compatible with Blue Sea Systems P12 Charger, M2 OLED, and Mini OLED meters

This universal temperature sensor allows you to monitor critical system temperatures and receive alerts when conditions exceed safe operating ranges. The compact, waterproof design ensures reliable performance in wet or humid conditions, while the included mounting tape simplifies installation on batteries, inverters, or other equipment.

Products specifications

Dimensions

2" x 2" x 2"

Features

WaterproofSensor

Type

Temperature Sensor

Best Use

14 Volt DC Systems24 Volt DC Systems

Warranty Details

Lifetime

just ordered the part that was easy and quick

easy

had what i needed

Good

Quick and easy, awesome price.

Please remove from listing the items that are discontinued. I had to order to find out the manufacturer has discontinued the item over 1 year ago. Had my truck in the shop waiting for the item only to find out after a week the item is not available.

Good parts, good prices

thank you

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