Inside a DHT 11

If you've ever wondered what's inside a DHT 11 temperature/humidity sensor, I'm here for ya'.

Resistive humidity sensor in a DHT 11

The die is about 1/16th of an inch across. Click the picture for a larger version.

Don't ask me how, but I managed to kill the three sensors I had around from various kits. In the process of building a remote temperature/humidity IoT node, I was able to test all three. I even swapped out the NodeMCU the node is based on with no joy. I bought a DHT 2 to replace it (livin' large, 7 bucks vs. 2) and that works so I figured I'd dissect this one for science fun.

There's an unmarked chip on the back and a thermistor somewhere in the package.

That's a 'yay', but of course a small one.