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![Blue Sea 1821 Universal Temperature Sensor [1821]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/64340XL.jpg?v=1591322104)
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Ships within 48 hours · Estimated delivery Oct 15 - Oct 20
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Description
Blue Sea 1821 Universal Temperature Sensor [1821]Universal Temperature Sensor Use with the P12 Charger, M2 OLED, and Mini OLED Meters Includes double sided tape Waterproof design Temperature Range: 40F to 300F ( 40C to 150C) Wire Length: 18" WARNING: This product can expose you to chemicals including di(2 ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
![Marinco 14/3 Locking Extension Cord - 15A - 50' [150050]](https://cdn.shopify.com/s/files/1/0405/8454/4408/products/63185XL.jpg?v=1591317507)
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 109 reviews
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Product Reviews
★★★★★ 5
Good but
Size: 40-50 HP
Bought and installed about a year ago. Fit exactly right and still holding up. Would buy again.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Oem quality, great kit
Size: 35-60 HP
Oem quality kit , got me back on the water,diy
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Reviewed in the United States on May 2, 2026
★★★★★ 1
DO NOT BUY THIS GARBAGE
Size: 20-35 HP
DO NOT BUY. Stopped working after 2nd trip total of 2 hours use. Not returnable after 30 days. Could easily ruin your engine. Expensive garbage.
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Reviewed in the United States on March 19, 2026
★★★★★ 5
Looks very good quality to me.
Size: 85-300 HP
Everything looks good quality to me. I find it odd that the people leaving bad reviews with pictures of broken and melted impeller, when you can clearly see the brass on the inside is brown and dirty like old pennies and mine is shiny new. It's almost like the took the pictures of the ones they replaced to get a refund and a free repair kit.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Great quality and price
Perfect fit. Received quicker than boat shop
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Reviewed in the United States on June 22, 2025
