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Analog TDS Sensor Hydroelectric Conductivity Sensor Compatible Liquid Detection Water Quality Monitoring

Analog TDS Sensor Hydroelectric Conductivity Sensor Compatible Liquid Detection Water Quality Monitoring
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  • Diy SuppliesElectrical
  • Diy SuppliesElectrical
Product Description
This product contains product introduction, wiring diagram, source code and so on. See below.
Product introduction
This equipment can be used for general household water quality measurement. Generally, tap water TDS is less than 100 (about 90 of Shenzhen) and pure water is less than 10.   The compatible TDS sensor is used to measure the TDS value of water. The TDS value can reflect the cleanliness of water. It can be used in water quality detection of domestic water, hydroponics and other fields. TDS (Total Dissolved Solids), Chinese name: total dissolved solids, also known as total dissolved solids, shows how many milligrams of soluble solids are dissolved in a liter of water. Generally speaking, the higher the TDS value, the more dissolved the water contains, the more unclean the water is. Therefore, the size of TDS can be used as a basis for reflecting the cleanliness of water.
Analog TDS Sensor Hydroelectric Conductivity Sensor Compatible Liquid Detection Water Quality Monitoring

(image from network) TDS pen is commonly used for TDS detection. Although it is cheap and easy to use, it can not transmit data to the control system for long-term on-line monitoring and water quality analysis. The use of specialized instruments, although the data can be transmitted, the accuracy is high, but the price is very expensive. To this end, we specially introduced this compatible TDS sensor, connected to the controller, can be used to measure the TDS value of water. The product is specially designed, plug and play, and is simple and convenient to use. 3.3-5.5V wide-voltage power supply, 0-2.3V analog signal output, so that this product is compatible with 5V, 3.3V control system, can be very convenient to connect to the ready-made control system. The AC signal is used as the excitation source in the measurement, which can effectively prevent the polarization of the probe, prolong the life of the probe and increase the stability of the output signal. The TDS probe is a water-proof probe and can be immersed in water for a long time. The product can be applied to water quality detection in the fields of domestic water and water culture. With this sensor, you can easily DIY a set of TDS detector, easy to detect the cleanliness of water, for your water quality close.   Be careful: TDS probe can not be used in water above 55 C. The location of TDS probe should not be too close to the edge of the container, otherwise it will affect the indication. The head and wire of TDS probe are waterproof and can be immersed in water, but the connection interface and signal transfer board are not waterproof. Please pay attention to the use. Product characteristics 1. wide voltage work: 3.3~5.5V 2. 0~2.3V analog signal output, compatible with 5V and 3.3V two control systems. 3. the excitation source is AC signal, effectively preventing probe polarization. 4. waterproof probe can be immersed in water for a long time. 5.simple connection, plug and play, no need to soldering.   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
Analog TDS Sensor Hydroelectric Conductivity Sensor Compatible Liquid Detection Water Quality Monitoring

source code #define TdsSensorPin A1 #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; //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; Shipping list   TDS signal adapter board x1 Waterproof TDS probe x1 Analog sensor wire x1 '
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