Uploaded June 2023 | Updated September 2026, 4 days ago

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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.

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Affiliate links:
HEKE Tech CL-067 Peltier cooler: https://s.click.aliexpress.com/e/_Dm4hnH7
TEC2-19006 Peltier cooler: https://s.click.aliexpress.com/e/_DmDmEyd
K-type thermocouple thermometer: https://s.click.aliexpress.com/e/_DkyBtH7
Multimeter (regular): https://s.click.aliexpress.com/e/_AfAhM2
Multimeter (clamp, for high currents): https://s.click.aliexpress.com/e/_ok3dshn
Power supply (30 V, 10 A): https://s.click.aliexpress.com/e/_DEVf21r
CPU cooler: https://s.click.aliexpress.com/e/_ooL0xKN

Read my article on my website:
https://curiousscientist.tech/blog/testing-two-powerful-peltier-coolers

You can find the relevant parts on my website:
https://curiousscientist.tech/tools