https://sensorrig.com/tags/fake/Recent content in Fake on SensorRig — Real Raspberry Pi Sensor MonitoringHugoen-usTue, 01 Sep 2026 00:00:00 +0000https://sensorrig.com/posts/your-ds18b20-temperature-sensor-is-likely-a-fake-counterfeit/Tue, 01 Sep 2026 00:00:00 +0000https://sensorrig.com/posts/your-ds18b20-temperature-sensor-is-likely-a-fake-counterfeit/Your DS18B20 Temperature Sensor Is Likely a Fake Counterfeit Three of the seven DS18B20 probes I bought in a single batch last year were fakes. They looked identical, they showed up on the 1-Wire bus, and they returned plausible-looking numbers — but they were off by 1.5 to 3.5 °C against a calibrated reference. This post is the procedure I now run on every probe before it goes anywhere near the rig’s SQLite store.