Hi, can this probe be used in food, like cheese?Tks

Hello,
I'm testing this sensor, and it is taking around 20min to change to the correct pH.
going from 7 to 4 pH.
Is that normal, or is something related with the potentiometer?

Can it be used in salt water? Interested in using it in a marine aquarium.

Hello good morning. I need to buy only the pH meter v1.1 module and I can't find it in the producer list. It's possible?

https://uploads.disquscdn.c...

Hello I have two little question about his product (Gravity: Analog pH Sensor / Meter Pro Kit for Arduino):

- Can It work with a raspberry pi zero?

- what is the Probe life in this specific product?

Thanks in advanced.

Good day , i would like to ask is there any specification or datasheet for this sensor in a pdf file ? thanks

Hello, Is there any calibration certificate with this type of sensor? Thanks

Hello, Is there any calibration certificate with this sensors? Thanks

What is the pressure range of this pH Sensor? I'm thinking to put it into a pipeline network where the pressure work will be about 200 psi

The probe and wire part of this sensor are waterproof, but the interface with the signal board is not waterproof. Please do waterproof treatment.

The probe is waterproof, but it is not recommended that it be completely immersed in the pipe for a long time and should be removed periodically for maintenance.

Hi David,

I have reviewed your post and the same thing is happening to us in an installation. I would like to ask you if you were able to solve your problem. Please tell me if you read this post to explain our problem in more detail and maybe you can give us your opinion that would be very valuable.

If you speak Spanish it would be easier to communicate.

Thank you very much and greetings

Hello does this device needs calibration??

Hi, I have just purchased this product and it works great. In order to integrate with my existing equipment I need to know the specification of the male screw threads on the outer surface of the body of the probe. Please could you tell me? Measuring it looks close to 1" major diameter at 14TPI, but female threads of this dimension will not fit. Thanks!

hi sir,
I am working on my master thesis, I need more details about the sample size and sampling frequency??
Amount of water to submerge the ph sensorvSKU:SEN0169

I'm a Masters student in the German Jordanian University and I'm currently doing my thesis and working on a project to measure water quality in different locations, however I was wondering if you can provide me with the data sheet of the Analog pH Sensor / Meter Pro Kit For Arduino,Analog ORP Sensor Meter For Arduino, Analog Electrical Conductivity Sensor /Meter V2 (K=1), DO Sensor, Analog Turbidity Sensor and Throw-in Type Liquid Level Transmitter ?
For example the technical sheets, calibration period needed, maintenance requirements, for how long can the sensor be submerged, sampling frequency, flow rate , depth of installation and can the sensor be immersed directly in the water body or should it be inserted after pumping the water in a tank ? Also do they all work for surface water?

Hi Ahamd,

Yes, the pro version can handle staying under water 24/7. You cannot directly use it with Raspberry Pi since it doesn't have ADC. you will need to use an external ADC converted to use this sensor with Raspberry Pi.

Hi Muqribunz,
Sorry, can not help you with this since we are not familiar with the ph meter as it's not our product.

Hello Hosan.

Not really sure about your issue, Could you please elaborate?
Did you try making sure whether your source code is correct? Consider rechecking the baud rate. Usually, this kind of issue arises when baud rate of your arduino doesn't match with the one on serial monitor.
Hope that helps.

Do you know why this ph meter reading is not constant? https://uploads.disquscdn.c...

Hi
I bought the pH meter H-101pH electrode but strangely the values it reads are busted.
I connected it to arduino one and the code with which I am using it is as follows;
/*
# This sample code is used to test the pH meter V1.1.
# Editor : YouYou
# Date : 2014.06.23
# Ver : 1.1
# Product: analog pH meter V1.1
# SKU : SEN0161
*/
#define SensorPin A2 //pH meter Analog output to Arduino Analog Input 2
#define Offset 0.00005 //deviation compensate
#define LED 13
#define samplingInterval 20
#define printInterval 500
#define ArrayLenth 40 //times of collection
int pHArray[ArrayLenth]; //Store the average value of the sensor feedback
int pHArrayIndex=0;
void setup(void)
{
pinMode(LED,OUTPUT);
Serial.begin(9600);
Serial.println("pH meter experiment!"); //Test the serial monitor
}
void loop(void)
{
static unsigned long samplingTime = millis();
static unsigned long printTime = millis();
static float pHValue,voltage;
if(millis()-samplingTime > samplingInterval)
{
pHArray[pHArrayIndex++]=analogRead(SensorPin);
if(pHArrayIndex==ArrayLenth)pHArrayIndex=0;
voltage = avergearray(pHArray, ArrayLenth)*5.0/1024;
pHValue = 3.5*voltage+Offset;
samplingTime=millis();
}
if(millis() - printTime > printInterval) //Every 800 milliseconds, print a numerical, convert the state of the LED indicator
{
Serial.print("Voltage:");
Serial.print(voltage,2);
Serial.print(" pH value: ");
Serial.println(pHValue,2);
digitalWrite(LED,digitalRead(LED)^1);
printTime=millis();
}
}
double avergearray(int* arr, int number){
int i;
int max,min;
double avg;
long amount=0;
if(number<=0){
Serial.println("Error number for the array to avraging!/n");
return 0;
}
if(number<5){ //less than 5, calculated directly statistics
for(i=0;i<number;i++){ amount+="arr[i];" }="" avg="amount/number;" return="" avg;="" }else{="" if(arr[0]<arr[1]){="" min="arr[0];max=arr[1];" }="" else{="" min="arr[1];max=arr[0];" }="" for(i="2;i&lt;number;i++){" if(arr[i]<min){="" amount+="min;" arr<min="" min="arr[i];" }else="" {="" if(arr[i]="">max){
amount+=max; //arr>max
max=arr[i];
}else{
amount+=arr[i]; //min<=arr<=max
}
}//if
}//for
avg = (double)amount/(number-2);
}//if
return avg;
}

How do you regular the pH meter ?
I tried to vary the trimmer and change the values to #define Offset values change but you can't adjust the values well.
Es. the water would have the ph/- at 7 the lemon /- at 2.4 then I tried a liquid with value 6.86.
Well Ser regulate the ph in one of these the others remain busted
I tried it with everyone but you can't align the values all together or one or another.

How can you do to improve??