Analog TDS Sensor Water Conductivity Sensor Tester Liquid Detection Water Quality Monitoring

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$26.99

Ex Tax: $26.99

Stock: In Stock
Model: EB0043793
SKU: EB0043793

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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;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;

}

Analog-TDS-Sensor-Water-Conductivity-Sensor-Tester-Liquid-Detection-Water-Quality-Monitoring-1601493

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Tags: Water Quality Tester