DS18B20 Water Proof Temperature Probe
The DS18B20 is a 1-wire programmable Temperature sensor from maxim integrated. It is widely used to measure temperature in hard environments like in chemical solutions, mines or soil etc. The constriction of the sensor is rugged and also can be purchased with a waterproof option making the mounting process easy.(find out a wide range of Sensor at solicstores.in)
It can measure a wide range of temperature from -55°C to +125° with a decent accuracy of ±5°C. Each sensor has a unique address and requires only one pin of the MCU to transfer data so it a very good choice for measuring temperature at multiple points without compromising much of your digital pins on the microcontroller.
The sensor works with the method of 1-Wire communication. It requires only the data pin connected to the microcontroller with a pull up resistor and the other two pins are used for power as shown below.
The pull-up resistor is used to keep the line in high state when the bus is not in use. The temperature value measured by the sensor will be stored in a 2-byte register inside the sensor. This data can be read by the using the 1- wire method by sending in a sequence of data. There are two types of commands that are to be sent to read the values, one is a ROM command and the other is function command. The address value of each ROM memory along with the sequence is given in the datasheet below. You have to read through it to understand how to communicate with the sensor.
|1||Ground||Connect to the ground of the circuit|
|2||Vcc||Powers the Sensor, can be 3.3V or 5V|
|3||Data||This pin gives output the temperature value which can be read using 1-wire method|
- Programmable Digital Temperature Sensor
- Each pin uses a heat-shrinkable tube to prevent short circuit, internal sealing glue.
- Stainless steel tube encapsulation waterproof moistureproof prevents rust.
- Stainless steel tube 6mm diameter by 30mm long.
- Uses 1-Wire interface- requires only one digital pin for communication.
- Unique 64-bit address enables multiplexing
- Multiple sensors can share one pin.
- Programmable alarm options
- Without the external components, the unique single bus.
- Measuring temperature at hard environments
- Liquid temperature measurement
- Applications where temperature has to be measured at multiple points
Package Includes :
1 x Waterproof Digital Thermal Probe DS18B20 1 meter cable.