Will this sensor be fine in a saltwater?
JaneYu 2017-05-07 06:53:05 7 Views15 Replies Will this sensor be fine in a saltwater?
- Is the cable UV resistant and suitable for outdoor use?
- Can both the cable and the shrink tube withstand the temperature of 125C?
JaneYu hi, can you give me an answer about what is the coverage area of that sensor? badly needed
JaneYu The coverage of this type of sensor is only in the vicinity of the sensor probe. The sensor can be regarded as an ideal point, and the sensor can only detect a point near the probe.
hi im using TDS sensor and temperature sensor from DFRobot, but I am confuse about the coding if I want to combine both sensor to my esp32 devkit:
1. What is the value of the compensation temperature?
2. What is the equation for the EC value?
Im using this equations:
dallasTemperature.requestTemperatures();
sensor::watertemp = dallasTemperature.getTempCByIndex(0);
float rawEc = analogRead(pin::tds_sensor) * device::aref / 4096.0; // read the analog value more stable by the median filtering algorithm, and convert to voltage value
float temperatureCoefficient = 1.0 + 0.02 * (sensor::watertemp - 25.0); // temperature compensation formula: fFinalResult(25^C) = fFinalResult(current)/(1.0+0.02*(fTP-25.0));
sensor::ec = (rawEc / (1 + (temperatureCoefficient) * sensor::ecCalibration); // temperature and calibration compensation
sensor::tdsReading = (133.42 * pow(sensor::ec, 3) - 255.86 * sensor::ec * sensor::ec + 857.39 * sensor::ec) * 0.5; //convert voltage value to tds value
may I know the temperature coefficient for the TDS sensor
Is this formula can be used for any environment?
Do you have any reference for this equations?
What is the meaning of 1.0 and 0.02 in the temperatureCoefficient equation?
JaneYu Is this sensor food safe for a temperature range between 32 and 95 F (0 and 35C) ?
JaneYu Hi, The sensor can be used for food-related measurements in normal PH environments, and many of our customers use the sensor for domestic water measurement.
How can I connect a second pump? What extension is needed for a second pump?
JaneYu Will there be a problem using this probe in sludge that contains hydrogen sulphide, hydrogen gas, carbon dioxide and methane gas?
JaneYu Can I inmerse all the cable of the sensor, or I can only inmerse the metal head?
JaneYu It is hard to give a certain lifetime for this sensor. As long as the parts are not broken, you can use it for several years.
JaneYu Yes, you can use it for a long time, it is good for thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system.
JaneYu Woow that's great. Thank you. I need it to mesure the temperature of water permanently
The sensor tube is made of stainless steel, and the wires is enclosed by rubber. please refer to the PH range of these material
JaneYu May I know how many sensors do you need? If the quantity is large, we will consider it .
JaneYu 
