# Large type K thermocouple to MAX6675 Amplifier **URL:** \ **Category:** General Guidance\ **Created:** [April 25, 2025, 4:48pm UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612 "2025-04-25T16:48:34Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![zabmtr](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/zabmtr/32/1129421_2.png) [@zabmtr](https://forum.arduino.cc/u/zabmtr)\ **Post date:** [April 25, 2025, 4:48pm UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/1 "2025-04-25T16:48:34Z")
Hi everyone! I need to measure temperatures between -130C and +20C on a aluminum plate, to further maintain it at a set temperature with a heating device and a controlled PID loop. I ordered this type K thermocouple from RS: [https://uk.rs-online.com/web/p/thermocouples/0192142?gb=s](https://uk.rs-online.com/web/p/thermocouples/0192142?gb=s) Ref: 192-142 And would like to connect it to MAX6675. However, the plug is way too large for the MAX6675 which require a 2-Wire Tail. Has anyone solves this? So far I see two options: - find an adapter, but which one? - remove the plug and hope the wire can be used as such, is it possible? Any other suggestions? Thank you! ☀ ---
**Author:** ![jim-p](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/jim-p/32/922840_2.png) [@jim-p](https://forum.arduino.cc/u/jim-p)\ **Post date:** [April 25, 2025, 5:27pm UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/2 "2025-04-25T17:27:47Z")
> **[Standard Size Thermocouple Connectors without Write-On Tag](https://www.dwyeromega.com/en-us/standard-size-thermocouple-connectors-without-write-on-tag/OST/p/OST-K-F)** > > Standard size, round 2-pin TC connectors are designed to quickly connect sensors to extension cables or instrumentation. Click to learn more. ---
**Author:** ![robtillaart](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/robtillaart/32/1098811_2.png) [@robtillaart](https://forum.arduino.cc/u/robtillaart)\ **Post date:** [April 25, 2025, 5:28pm UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/3 "2025-04-25T17:28:54Z")
maybe > **[761 for 'banana plug sockets' | RS](https://uk.rs-online.com/web/c/?searchTerm=banana%2Bplug%2Bsockets)** ---
**Author:** ![zabmtr](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/zabmtr/32/1129421_2.png) [@zabmtr](https://forum.arduino.cc/u/zabmtr)\ **Post date:** [April 25, 2025, 6:59pm UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/4 "2025-04-25T18:59:00Z")
Thanks for your help! I already checked these kind of adapters, but it simply provides smaller plugs whereas I need to switch from round female plugs to wire tails. I might just unscrew and release the wire ---
**Author:** ![jim-p](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/jim-p/32/922840_2.png) [@jim-p](https://forum.arduino.cc/u/jim-p)\ **Post date:** [April 26, 2025, 7:31am UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/5 "2025-04-26T07:31:02Z")
You open them up and connect it to the MAX6675 using wires ---
**Author:** ![TomGeorge](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/tomgeorge/32/215261_2.png) [@TomGeorge](https://forum.arduino.cc/u/TomGeorge)\ **Post date:** [April 27, 2025, 4:14am UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/6 "2025-04-27T04:14:18Z")
Hi, @zabmtr Welcome to the forum. If the installation is not temporary and you do not require the k-type to be unplugged go for direct connection. Remove the plug. It will give you a more reliable and accurate reading as the connection is more permanent and stable. ![image](https://europe1.discourse-cdn.com/arduino/original/4X/9/5/1/951fc64e90b8891f5e40f1029c02bb3c4266fcd5.jpeg) It looks like the k-type you have is the "naked" type, no electrical insulation around the junction, you may need to provide some electrical insulation around it in the aluminium plate. Tom.. 😃 👍 ☕ 🇦🇺 ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [October 24, 2025, 4:14am UTC](https://forum.arduino.cc/t/large-type-k-thermocouple-to-max6675-amplifier/1376612/7 "2025-10-24T04:14:36Z")
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