5C7 DS18B20 Waterproof Temperature Sensor Waterproof Digital Thermal Probe

Description

The DS18B20 is a widely used 1-Wire waterproof digital temperature sensor that comes in the form of a Stainless-steel probe. it is manufactured by Dallas Semiconductor (acquired by Maxim Integrated). This sensor has the characteristics of small size, low hardware overhead, high precision, and strong anti-interference ability. This sensor is perfect for measuring temperature in wet conditions, beneath the ground, underwater, or something far away. 

This Sensor can measure a wide temperature in the range of -55°C ( -67°F) to +125°C (+257°F) with +-5% accuracy. This Sensors used a one-wire bus protocol to communicate with a microcontroller, which means it uses a single digital pin of any microcontroller/microprocessor to transmit the temperature readings. The temperature sensor’s resolution ranges from 9 to 12 bits. however, the default resolution to power up the sensor is 12-bit (i.e., 0.0625°C precision).

Specifications

Technical Features

• Unique 1-Wire® Interface Requires Only One Digital Pin of microcontroller/microprocessor for Communication
• In Parasitic Power Mode, Requires Only 2 Pins for Operation (Data and GND pin).
• Multiple temperature sensors can share one pin of microcontroller/microprocessor
• No External Components are Required
• Temperature Sensor and EEPROM
• Unique 64-bit address enables multiplexing
• Programmable alarm options
• It is Available in 8-Pin SO (150 mils), 8-Pin µSOP, and 3-Pin TO-92 Packages

Application

• This sensor is widely used to calculate the temperature in a rigid environment like mines, chemical solutions, soil, etc.
• Measuring Liquid temperature
• it can be used in the thermostat controls system
• Used in industries as a temperature-measuring device
• It is very useful where the temperature has to be measured at multiple points

Pinout/Pin Diagram

Working Principle of DS18B20 Waterproof Temperature Sensor

The working principle of the DS18B20 Waterproof temperature sensor is similar to any other temperature sensor. The resolution of the sensor ranges from 9-bits to 12-bits. But 12-bit is used as the default resolution to power up this sensor. It measures temperature, as well as the conversion of Analog-to-Digital (A-to-D), which can be done with a convert-T command. The output temperature value can be stored within the 2-byte register in the sensor, and after that, this sensor returns to its inactive state.

The DS18B20 Temperature Sensor has three wires/pins (Vcc, ground, and data wires) for operation. But in parasite mode, only the ground and data lines are used to operate the sensor, the input voltage of the sensor is supplied through the data line.

Hardware Required

• Arduino Uno
• USB 2.0 cable type A/B
• DS18B20 Temperature Sensor
• Jumper Wires
• 9V power adapter for arduino

Wiring Diagram

Code

Note: You have to install Dallas Temperature Library

#include <OneWire.h>
#include <DallasTemperature.h>

const int SENSOR_PIN = 13; // Arduino pin connected to DS18B20 sensor's DQ pin

OneWire oneWire(SENSOR_PIN);         // setup a oneWire instance
DallasTemperature tempSensor(&oneWire); // pass oneWire to DallasTemperature library

float tempCelsius;    // temperature in Celsius
float tempFahrenheit; // temperature in Fahrenheit

void setup()
{
  Serial.begin(9600); // initialize serial
  tempSensor.begin();    // initialize the sensor
}

void loop()
{
  tempSensor.requestTemperatures();             // send the command to get temperatures
  tempCelsius = tempSensor.getTempCByIndex(0);  // read temperature in Celsius
  tempFahrenheit = tempCelsius * 9 / 5 + 32; // convert Celsius to Fahrenheit

  Serial.print("Temperature: ");
  Serial.print(tempCelsius);    // print the temperature in Celsius
  Serial.print("°C");
  Serial.print("  ~  ");        // separator between Celsius and Fahrenheit
  Serial.print(tempFahrenheit); // print the temperature in Fahrenheit
  Serial.println("°F");

  delay(500);
}