Analog TDS Sensor Water Conductivity Sensor Tester Liquid Detection Water Quality Monitoring Geekcreit for Arduino - products that work with official Arduino boards COD

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ID: 1601493
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                    Note:
                     
                    TDS probes cannot be used in water above 55 °C.
                    The TDS probe should not be placed too close to the edge of the container, as it will affect the display.
                    The head and lead of the TDS probe are waterproof and can be immersed in water, but the connection interface and the signal adapter board are not waterproof. Please pay attention to use.
                     
                    Product Features:
                     
                    1. Wide voltage operation: 3.3~5.5V
                    2. 0~2.3V analog signal output, compatible with 5V, 3.3V two control systems
                    3. The excitation source is an AC signal, effectively preventing probe polarization
                    4. Waterproof probe for long-term immersion in water
                    5. compatible, easy to connect, plug and play, no soldering required

                    Technical specifications:
                     
                    Signal adapter board:
                     
                    Input voltage: 3.3~5.5V
                    Output signal: 0~2.3V
                    Working current: 3~6mA
                    TDS measurement range: 0~1000ppm
                    TDS measurement accuracy: ±10% F.S. (25°C)
                    Size: 42*32mm
                    Module interface: XH2.54-3P
                    Electrode interface: XH2.54-2P
                     
                    TDS probe:
                     
                    Number of probes: 2
                    Overall length: 83cm
                    Connection interface: XH2.54-2P
                    color: White
                    Other: Waterproof probe

                    Package includes:


                    1 x TDS signal adapter board
                    1 x Waterproof TDS probe
                    1 x Analog sensor line

                    source code:
                     
                    #define TdsSensorPin A1
                    #define kValue 1.8 //kValue = value of calibrator TDS / measurement to get TDS
                    #define VREF 5.0 // analog reference voltage(Volt) of the ADC
                    #define SCOUNT 30 // sum of sample point
                    Int analogBuffer[SCOUNT]; // store the analog value in the array, read from ADC
                    Int analogBufferTemp[SCOUNT];
                    Int analogBufferIndex = 0, copyIndex = 0;
                    Float averageVoltage = 0, tdsValue = 0, temperature = 25;
                     
                    Void setup()
                    {
                        Serial.begin(115200);
                        pinMode(TdsSensorPin, INPUT);
                    }
                     
                    Void loop()
                    {
                       Static unsigned long analogSampleTimepoint = millis();
                       If(millis()-analogSampleTimepoint > 40U) //every 40 milliseconds,read the analog value from the ADC
                       {
                         analogSampleTimepoint = millis();
                         analogBuffer[analogBufferIndex] = analogRead(TdsSensorPin); //read the analog value and store into the buffer
                         analogBufferIndex++;
                         If(analogBufferIndex == SCOUNT)
                             analogBufferIndex = 0;
                       }
                       Static unsigned long printTimepoint = millis();
                       If(millis()-printTimepoint > 800U)
                       {
                          printTimepoint = millis();
                          For(copyIndex=0;copyIndex
                            analogBufferTemp[copyIndex]= analogBuffer[copyIndex];
                          averageVoltage = getMedianNum(analogBufferTemp,SCOUNT) * (float)VREF / 1024.0; // read the analog value more stable by the median filtering algorithm, and convert to voltage value
                          Float compensationCoefficient=1.0+0.02*(temperature-25.0); //temperature compensation formula: fFinalResult(25^C) = fFinalResult(current)/(1.0+0.02*(fTP-25.0));
                          Float compensationVolatge=averageVoltage/compensationCoefficient; //temperature compensation
                          tdsValue=(133.42*compensationVolatge*compensationVolatge*compensationVolatge - 255.86*compensationVolatge*compensationVolatge + 857.39*compensationVolatge)*0.5*kValue; //convert voltage value to tds value
                          //Serial.print("voltage:");
                          //Serial.print(averageVoltage,2);
                          //Serial.print("V ");
                          Serial.print("TDS Value:");
                          Serial.print(tdsValue,0);
                          Serial.println("ppm");
                       }
                    }
                    Int getMedianNum(int bArray[], int iFilterLen)
                    {
                          Int bTab[iFilterLen];
                          For (byte i = 0; i
                     bTab[i] = bArray[i];
                          Int i, j, bTemp;
                          For (j = 0; j < iFilterLen - 1; j++)
                          {
                     For (i = 0; i < iFilterLen - j - 1; i++)
                              {
                       If (bTab[i] > bTab[i + 1])
                                {
                    bTemp = bTab[i];
                           bTab[i] = bTab[i + 1];
                    bTab[i + 1] = bTemp;
                        }
                     }
                          }
                          If ((iFilterLen & 1) > 0)
                    bTemp = bTab[(iFilterLen - 1) / 2];
                          Else
                    bTemp = (bTab[iFilterLen / 2] + bTab[iFilterLen / 2 - 1]) / 2;
                          Return bTemp;
                    }
                     





















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