What is construction in thermometer?
Subject: Physics. Topic: Temperature. Thermometers consist of three basic elements: spirit-filled liquid, which response to changes in heat and cold; a glass tube to house the temperature-measuring liquid; and black ink to color in the engraved scale marks with readable numbers.
What is the construction and working of a thermometer?
A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer’s bulb heats up, the liquid rises in the glass tube. The glass tube is mounted on a backboard that is marked in units called degrees.
What are the 3 types of thermometers?
What Are the Different Ways a Thermometer Can Be Used?
- Axillary Thermometers (under your arm)
- Oral Thermometers (under your tongue)
- Tympanic Thermometers (in your ear)
- Rectal Thermometers (in your rectum)
- Temporal Artery or Infrared Thermometers (across your forehead)
What is the construction of digital thermometer?
This component include temperature sensor, an analogue -to-digital converter, an 8051 microcontroller and a 16×2 LCD display unit. The temperature sensor used is thermistor. The sensor senses temperature and generates an analogue voltage which is proportional to the sensed temperature.
Why there is construction in the clinical thermometer?
A clinical thermometer has a kink or a constriction in the glass tube just above the mercury bulb. This kino prevents immediate backflow of the mercury from thetube to the bulb, thus allowing us to read the temperature conveniently.
Why is mercury used in the construction of a thermometer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn’t stick to the glass surface of glass.
Why a construction is kept in the clinical thermometer?
A narrow constriction is kept near the bulb because it ensures that the mercury in the thermometer does not contract and flows back into the bulb before the temperature is read.
What are the 5 types of thermometer?
There are different types, but not all thermometers are right for your child.
- Digital thermometers.
- Ear (or tympanic) thermometers.
- Infared thermometers.
- Strip-type thermometers.
- Mercury thermometers.
What are the parts of a thermometer?
The main parts of a mercury thermometer are the capillary, the bulb, the scale, and the expansion chamber.
- Spherical Bulb. The bulb is the lowest part of the thermometer, which has a spherical shape.
- Capillary Tube.
- Expansion Chamber.
- Scale Lines.
- Safety Precautions.
How is a digital thermometer an embedded system?
A Digital Thermometer kit using Temperature Sensor DS1620 and a control application. A Digital Temperature sensor is used which provides 9-bit temperature reading and is interfaced to the microcontroller. The microcontroller receives this digital input and displays it on the LCD interfaced to it.
Why a construction is provided in the capillary tube of a clinical thermometer?
Answer: The kink prevents the mercury present in the capilalry to fall back into the bulb . So it seperates the high – temperature mercury and cool mercury and allows the user to take a reading when the thermometer is taken out.
How are the parts of a thermometer made?
Construction of Thermometer Firstly, a dry and clean capillary glass tube of fine and uniform bore is taken. One end of it is connected to a cylindrical bulb B and the other end is closed. Now the tube is kept vertically straight by a stand and a funnel F is connected by a rubber tube to the open end of the capillary tube.
Can a thermocouple be used to make a temperature thermometer?
Schematic of the thermocouple set up for making a thermometer using the voltage generated by a thermocouple. The signal from the thermocouple was amplified to raise the voltage output and to match impedance to the EA-200 Data Collector/Analyzer.
What kind of thermometer is used in a laboratory?
Laboratory thermometer consists of a bulb with a long capillary tube. Laboratory thermometer can be used to determine both hot and cold substances. Generally, laboratory thermometer is prepared in Celsius scale which has the scale from -10° C to 110° C.
What kind of wire is a resistance thermometer made of?
It is also called a resistance temperature detector. An RTD is basically a sensor that consists of fine wire wrapped around a glass or ceramic material and various other constructions are also used. The wire used is typically made of copper, nickel or platinum.
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