SEN0169 - Static Voltage Readings
Account cancelled 2017-12-11 03:39:38 1988 Views2 Replies Hi DF,
I had originally purchased the SEN0161 pH sensor, and was using it monitor a Kombucha brew which generally decreased from 3.6 down to 2.9 pH. I upgraded to the SEN0169 in order to submerge for long period of times.
The problem:
Basically, my SEN0169 is giving me the same voltage readings no matter the solution. I understand there are some conversions when reading analog on Arduino, but I still see no difference in readings between 4.0 and 7.0 control solutions.
This is strange, considering my SEN0161, given the exact same wiring, produces different voltage readings in the different solutions. I've also tried swapping the shields out from each product, but the static readings on the SEN0169 remain.
Are there any other trouble shooting steps you'd recommend?
Is it possible I have a defective unit?
I had originally purchased the SEN0161 pH sensor, and was using it monitor a Kombucha brew which generally decreased from 3.6 down to 2.9 pH. I upgraded to the SEN0169 in order to submerge for long period of times.
The problem:
Basically, my SEN0169 is giving me the same voltage readings no matter the solution. I understand there are some conversions when reading analog on Arduino, but I still see no difference in readings between 4.0 and 7.0 control solutions.
This is strange, considering my SEN0161, given the exact same wiring, produces different voltage readings in the different solutions. I've also tried swapping the shields out from each product, but the static readings on the SEN0169 remain.
Are there any other trouble shooting steps you'd recommend?
Is it possible I have a defective unit?
2018-07-22 00:03:25 I have the same problem with my newly bought pH sensor. The pH value does not change even if I use standard buffer solutions of pH4, and pH10. simontanpaul
simontanpaul 2017-12-11 15:58:24 When you short the BNC connector of the adaptor, is the reading pH 7.0 in the serial monitor? robert.chen
robert.chen 