hello dear friends,
i am willing to start a project for ph-measurement:
pH measurement has many uses - for example for all sorts of laboratory and industrial uses.
i want to run a Raspberry Pi (or Arduino of course) to read pH, log it, and integrate it into a concept that runs more sensors.
pH (power of hydrogen) shows us how how acidic or basic a water-based solution is. This is a equivalent of electrical power...to be more precice - the ph shows us a value of the concentration of hydrogen ions (H+) present in a probe.
i have tried to make up my mind and have read some forum threads here - and more stuff to dive into the technique: - as of the learing curve i have went through - i have to recap.
How to connect a sensor to the Pi?
i want to read pH from a glass electrode, and then (afterwards) convert the voltage is generates to digital form. There are circuits available to do this - the details of how they work vary: One idea is to match the high impedance of the sensor to the low impedance of the electronics using an operational amplifier (op amp), While doing so we can afterwards convert the analog signal to a digital signal using an analog-to-digital converter (ADC).
At the end of this process we can interpret the digitized voltage as pH.
i can use a circuit with while use 4-6 wires connected to GPIO pins, or the USB port. GPIO circuits get power by connecting to a 3.3V or 5V pin, and a ground pin. They also connect to either UART, I²C, or SPI pins to send and receive data.
the planned setup:
Raspberry Pi Model 3B
Raspberian OS
or alternative : Arduino !!!
Atlas Scientific OEM pH Sensor with OEM Simple Development Board
i have found some docs here:
https://atlas-scientific.com/files/oem_pH_datasheet.pdf
i have decided to connect an Atlas Scientific EZO-pH™ Circuit to a Raspberry Pi 3.
i want to do this with the Gen 2 Electrically Isolated USB EZO™ Carrier Board connected to an Raspberry Pi 3.0 B+ , running our Atlas IoT Monitoring Software. While doing so i want to convert the Raspberry Pi into a monitoring system. Atlas IoT™ uses the Raspberry Pi to create a powerful new monitoring system.
out of the manual of Atlas-scientific: /(see above)
Questions that arise:
Should i connect RTD, pH, ORP, DO, EC!?,
However I don't think I am ever going to require the quantities ( in other words - the threshold seems to be xy units before the savings are significant) that will give me sufficient savings to justify the additional work to implement them (when we compare to the ease of the EZOs).
so the question is: is it very difficult to integrate these - from an engineering and design standpoint?
i am willing to start a project for ph-measurement:
pH measurement has many uses - for example for all sorts of laboratory and industrial uses.
i want to run a Raspberry Pi (or Arduino of course) to read pH, log it, and integrate it into a concept that runs more sensors.
pH (power of hydrogen) shows us how how acidic or basic a water-based solution is. This is a equivalent of electrical power...to be more precice - the ph shows us a value of the concentration of hydrogen ions (H+) present in a probe.
i have tried to make up my mind and have read some forum threads here - and more stuff to dive into the technique: - as of the learing curve i have went through - i have to recap.
How to connect a sensor to the Pi?
i want to read pH from a glass electrode, and then (afterwards) convert the voltage is generates to digital form. There are circuits available to do this - the details of how they work vary: One idea is to match the high impedance of the sensor to the low impedance of the electronics using an operational amplifier (op amp), While doing so we can afterwards convert the analog signal to a digital signal using an analog-to-digital converter (ADC).
At the end of this process we can interpret the digitized voltage as pH.
i can use a circuit with while use 4-6 wires connected to GPIO pins, or the USB port. GPIO circuits get power by connecting to a 3.3V or 5V pin, and a ground pin. They also connect to either UART, I²C, or SPI pins to send and receive data.
the planned setup:
Raspberry Pi Model 3B
Raspberian OS
or alternative : Arduino !!!
Atlas Scientific OEM pH Sensor with OEM Simple Development Board
i have found some docs here:
https://atlas-scientific.com/files/oem_pH_datasheet.pdf
i have decided to connect an Atlas Scientific EZO-pH™ Circuit to a Raspberry Pi 3.
i want to do this with the Gen 2 Electrically Isolated USB EZO™ Carrier Board connected to an Raspberry Pi 3.0 B+ , running our Atlas IoT Monitoring Software. While doing so i want to convert the Raspberry Pi into a monitoring system. Atlas IoT™ uses the Raspberry Pi to create a powerful new monitoring system.
out of the manual of Atlas-scientific: /(see above)
In previous projects i never have used any Atlas-Scientific EZO circuits, devices and sensors.Step 2. Connecting to the Raspberry Pi
Using the HDMI cable, connect the monitor of choice to the Raspberry Pi. Next, i will connect the USB power supply and mouse to the Pi.
Side Note:
In order for the Raspberry Pi to detect the EZO-pH™ Circuit via USB, the circuit must be in UART mode. By default, all our EZO devices are in UART mode. You can easily tell what mode the circuit is in by looking at the LED on the circuit. If the LED is blinking green you are in UART mode. If its solid blue you are in I2C mode.
Questions that arise:
Should i connect RTD, pH, ORP, DO, EC!?,
However I don't think I am ever going to require the quantities ( in other words - the threshold seems to be xy units before the savings are significant) that will give me sufficient savings to justify the additional work to implement them (when we compare to the ease of the EZOs).
so the question is: is it very difficult to integrate these - from an engineering and design standpoint?