Testing two powerful Peltier coolers: TEC2-19006 and Heke Tech CL-C067

In this video, I test two "new" Peltier coolers. I wanted to get some more powerful Peltier coolers for a project and I found these two devices on Aliexpress. According to the parameters published on the sellers' site, these devices are able to reach below -30°C without any issues while consuming relatively low power. Unfortunately, only the TEC2-19006 seemed to be fulfilling the promises made by the Aliexpress pages. The Heke Tech performed poorly. Please subscribe to my channel! Join my channel membership:    / @curiousscientist   Affiliate links: HEKE Tech CL-067 Peltier cooler: https://s.click.aliexpress.com/e/_Dm4... TEC2-19006 Peltier cooler: https://s.click.aliexpress.com/e/_DmD... K-type thermocouple thermometer: https://s.click.aliexpress.com/e/_Dky... Multimeter (regular): https://s.click.aliexpress.com/e/_AfAhM2 Multimeter (clamp, for high currents): https://s.click.aliexpress.com/e/_ok3... Power supply (30 V, 10 A): https://s.click.aliexpress.com/e/_DEV... CPU cooler: https://s.click.aliexpress.com/e/_ooL... Read my article on my website: https://curiousscientist.tech/blog/te... You can find the relevant parts on my website: https://curiousscientist.tech/tools