OWC In-line Digital Thermal Sensor for Hard Drive Upgrade for 27-inch iMacs 2012 and Later

(3) Reviews Write a Review
£37.49 (Inc. VAT)
£31.24 (Ex. VAT)
Current Stock:
Adding to cart The item has been added

or checkout now with


OWC In-line Digital Thermal Sensor for 27-inch iMac (Late 2012 - 2019)

  • Required for any drive installed into the main drive bay.
  • Eliminate fan noise and maintain correct system fan control when upgrading your 2012 or later iMac.
  • The only iMac HDD upgrade option on the market certified to pass the Apple Hardware Test.
  • Fixes firmware incompatibility issues with third-party hard drives.
  • Engineered in-house and backed by OWC's award-winning customer support.

Improve Performance and Capacity. Upgrade Your iMac with Confidence.
OWC's in-line solution is the only hardware digital thermal sensor on the market allowing a third-party SATA drive to be installed in your iMac. A convenient, plug-and-play cable, the In-line Digital Thermal Sensor eliminates fan noise and maintains proper system fan control through the iMac's System Management Controller. This innovative device is designed specifically for the iMac, requires no software hacks and ensures compatibility with Apple's built-in diagnostic processes.

Using an OWC Internal HDD DIY Kit (sold separately), replace your iMac's original hard drive with up to an 8.0TB hard drive or a lighting fast SSD with a NewerTech Adaptadrive, for dramatic upgrades in storage capacity or data speed while maintaining the original system's fan and diagnostic performance.

If you need an upgrade kit with tools, you can purchase the OWC Internal HDD DIY Kit.

Note: Before attempting to perform this installation, please watch the install video below to determine your ability to perform this complex upgrade. 

Professional installation is highly recommended. 

OWC assumes no responsibility for damage that may occur during the installation. Technical support for this DIY product consists only of the OWC Install Video.

Have OWC Upgrade Your iMac
While OWC encourages the DIY philosophy, this is a very difficult upgrade that requires advanced skills. If you are not fully confident in your ability to upgrade the drive in your 2012 iMac after watching the OWC Install Video, you should visit a local Mac and PC repair shop.


  • (1) OWC In-line Digital Thermal Sensor Cable
  • (1) 27" iMac Adhesive tape set for proper display resealing

NOTE: This kit contains consumable and/or one-time-use components and therefore is non-refundable if opened. If you have any concerns about your ability to perform the upgrade, you can return the unopened kit for a refund.

Instructions for use Display Mount Adhesive Strips - PDF  file

Professional installation is highly recommended.


27-inch Late 2012 iMac13,2 - A1419 - EMC - 2546 | 2.9GHz i5, 3.2GHz i5, 3.4GHz i7
27-inch Late 2013 iMac14,2 - A1419 - EMC - 2639 | 3.2GHz i5, 3.4GHz i5, 3.5GHz i7
27-inch Late 2014 iMac15,1 - A1419 - EMC - 2806 | 3.5GHz i5, 4.0GHz i7
27-inch Mid 2015 iMac15,1 - A1419 - EMC - 2806 | 3.3GHz i5, 3.5GHz i5, 4.0GHz i7
27-inch Late 2015 iMac17,1 - A1419 - EMC - 2834 | 3.2GHz i5, 3.3GHz i5, 4.0GHz i7
27-inch Mid 2017 iMac18,3 - A1419 - EMC - 3070 | 3.4GHz i5, 3.5GHz i5, 3.8GHz
27-inch Early 2019iMac19,1 - A2115 - EMC - 3194 | 3.0GHz i5, 3.1GHz i5, 3.7GHz i5, 3.6GHz i9


  • 5

    Imac components

    Posted by Mr Siddique Hussain on 17th Oct 2021

    Item was just as described. Cam e on time and seems to work perfect;y.

  • 3

    Does the job!

    Posted by Carl on 7th Jan 2021

    My late 2014 iMac needed a new hard disc, so I fitted an SSD and used this, as I understand that it is needed to control the fan speed and I didn't want to try it without and then have to split the screen from the case again to retro-fit it. Having done an extended write to the SSD during cloning and it barely got warm, I wonder if this is really necessary when fitting an SSD rather than a mechanical HDD? Perhaps a cheaper-to-produce model could be made for SSDs that instead of giving OSX an actual temperature reading from the sensor, it simply had a fixed resistor that was the equivalent of '20 degC all is well' to send back to OSX? Although I appreciate that this is a specific OWC connector, the price is quite steep for what it's made of, so three stars instead of five. Anyway, it got the job done and all is well.

  • 5

    In line thermal sensor

    Posted by Yaya on 28th Jul 2020

    Arrived quickly, well packaged, easy to install and works as advertised