My feather with nodemcu and flow sensor

Will check the quality based on pH and turbidity

Monitoring the environmental parameters like Temperature , Humidity, CO2, CO, Smoke, LPG present in air and Temperature and Turbidity of water.

Water usage at Cayella

Testing water temperature monitor

Water Pool Temperature

ESP8266 for Temperature logging for a solar water tank and the ambient conditions.

Test für Sous Vide

Municipal potable water tank monitoring: the system consists of a Raspberry B+ with UPIS power backup, a Teltonika twct22 controller, a USB<-->RS232 converter and a 3G USB stick (huawei modem firm), recorded parameter is 3G signal, refresh rate ~20sec