Hi DFRobot, can I use this voltage isolator with the SEN0198 High Temperature probe? Since it has an analog output to for the resistance at a given temperature. And I am using the ...

Sorry, this isolator does not work with FireBeetle. This is because the isolator is 5V, but the FireBeetle pins can only output 3.3V.

Sorry, this module currently only supports 5V, we will release a version for 3.3V in the future

Yes, you can connect it to ADS1115

Hello, we are using a Gravity TDS Sensor and other brand of pH sensor, can we still use the analog signal isolator for the Gravity TDS only?
Thank you so much for your response

dont you need a PNP for the VCC side of the sensor?

Hi regis,

Please pay attention to change the ADC value of ESP32.

Dear sir,
As this unit (Analog Signal isolator) is still out of stock, I'm looking for a solution to connect the pH, TDS and ORP sensor on the same board.
Can you detailled me your proposal a little bit ?
On the circuit drawing it seems that you use 2 bc337 and 1kohms resistor for each isolated power output (then the green go on the sensor gnd and the orange cable goes on the Vcc of the sensor I guess).
I'd like to know why it is also connected to the digital input and if it you need to set a specific level to this input in your code ?

Many thanks !

Hello! I was just wondering, what if I decided to isolate the power such that the sensors operate one at a time and not at the same time (keeping in mind they are all connected to the same power source). Perhaps that may overcome the problem due to interference? Thanks

could this be a suitable way to keep the divided voltage from a plasma from blowing up my arduino?

Hi can this be used to isolate 4-20 mA current signal sensor outputs? Or is it just for analog voltage? Also, can it isolate digital signals as they are just voltage levels anyway?

Depending on whether the sensor you are using is digital or analog.
Here I recommend you use the simulation.

In general, when there is a common power source between the two or more water sensors and when one water sensor (such as an electrical conductivity sensor) begins probing its environment trough sending out electrical pulses it will cause distortion on another sensor reading in that same environment.

And I also want to know why analog isulator is needed when more than one water quality sensor is used?

I also want to know, If two sensors are connected with two separated arduinos that is connected with software serial communication, do I need to use analog isolator module?

What kind of water quality sensors need analog signal isolator?

Since they do not share a common power source you would not need an isolator in this case!

Hey Qawi,
In this case your water temperature sensor will not need to be isolated from the other sensors and therefore will not need to be accounted for. However, your EC and pH sensor will need isolation if they share a common power source.

Hi, if I have 4x sensors, TDS + ORP + pH + EC do I need 3 or 4 isolators? Also, if sensors are placed far apart from each other in a large tank of water (>500Litres) will it still cause interference without isolator boards?

Hey Tay,
If all three sensors will be used together in one system, you would need 3 isolator boards to ensure there is no interference.

Hi! If I use one PH probe (SEN0161-V2), one EC probe, one ORP probe and one TEMP probe, how many of these isolator do I need? One for PH and one EC only ? Or one for each but the TEMP one? Thanks you!