What is a laboratory thermometer Class 7?
What is a laboratory thermometer Class 7?
A laboratory thermometer is used to measure temperatures or the temperature changes of other objects. These thermometers are usually filled with red spirit rather than mercury. The range of a laboratory thermometer is generally from −10°C to 110°C.
What is the use of laboratory thermometer?
A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature. It ranges from -10˚C to 110˚C. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances.
What is the difference between clinical and laboratory thermometer?
A clinical Thermometer is meant for clinical purposes. It is developed for measuring the human body temperature….Thermometers.
|Clinical Thermometer||Laboratory thermometer|
|Used to measure human body temperature||Used to measure temperature in the laboratory|
How does a laboratory thermometer work?
Laboratory thermometers are used to measure temperatures or temperature changes with a high degree of precision. The way a laboratory thermometer works depends upon its type. They are generally a liquid-in-glass device, a bimetallic strip, an electronic thermistor thermometer, or infrared (IR) device.
What is laboratory thermometer in short?
Laboratory thermometers are devices used to measure temperature. There are many types of lab thermometers such as differential, mechanical, logging, etc. While a lab thermometer can measure how hot or cold a sample or environment is, the range of measurement can vary widely between models.
What liquid is used in laboratory thermometer and why?
Mercury-in-Glass Thermometers use traditional mercury as an indicating fluid. Non-Mercury Thermometers are filled with an environmentally safe, non-hazardous liquid. Mercury-Filled Armored Thermometers are housed in a removable brass case that provides protection from breaking and spilling of hazardous mercury.
What are the two uses of laboratory thermometer?
Laboratory thermometers measure temperature with a high level of precision for applications such as experiment monitoring, instrument calibration, materials testing, and maintaining a sterile work environment.
Which is the common laboratory thermometer?
Answer: The laboratory thermometer as well as clinical thermometer are mercury thermometers. When heat is supplied to the thermometer bulb containing mercury , the mercury expands and rises in the glass tube of thermometer.
What is clinical thermometer explain with diagram?
: a thermometer for measuring body temperature that has a constriction in the tube above the bulb preventing movement of the column of liquid downward once it has reached its maximum temperature so that it continues to indicate the maximum temperature until the liquid is shaken back down into the bulb.
What are the three differences between clinical and laboratory thermometer?
The temperature range of clinical thermometers is 35°C to 42°C and that of laboratory thermometers is -10°C to 110°C. The least count of both the thermometers is different. The clinical thermometer is can be tilted while reading the temperature values whereas laboratory thermometer need to be kept upright.
Why can’t we use a laboratory thermometer to measure body temperature?
A laboratory thermometer cannot be used to measure the human body temperature. This is because as soon as we take out the bulb of the laboratory thermometer from our mouth, the level of mercury in its tube will start falling quickly. This will give a wrong value of the body temperature.
Which scale is used in laboratory thermometer?
which is quite suitable for measuring the temperature of the human body. Clinical thermometers are mainly used in clinics by doctors and physicians. Therefore we can say that a clinical thermometer measures temperature in celsius scales usually. Hence the correct option is C.
What is the purpose of a laboratory thermometer?
A laboratory thermometer is a tool used in laboratories to measure temperature with a high level of accuracy.
Can a thermometer be used in a clinical setting?
Laboratory Thermometer Laboratory thermometers cannot be used for clinical purposes because such thermometers read temperatures ranging from -10 oC to 110 oC, which is very high as compared to the human body temperature range.
What does silver mean on a laboratory thermometer?
The silver color on the laboratory thermometer at the bulb normally indicates the presence of mercury. Mercury expands as the temperature increases, thus raising the reading, while decreasing temperatures contract the mercury, lowering the reading.
How do you check the temperature of a thermometer?
First, clean and sterilize the thermometer. Swing or jerk the thermometer so that the mercury is brought back to the glass bulb. Note the temperature difference between two bigger marks on the scale of the thermometer. Let’s say, the difference is of 1 degree.
What temperature scale is used on lab thermometers?
Thermometers measure temperature according to well-defined scales of measurement. The three most common temperature scales are Fahrenheit, Celsius, and Kelvin . Temperature scales are created by identifying two reproducible temperatures. The freezing and boiling temperatures of water at standard atmospheric pressure are commonly used.
What can a lab thermometer measure?
Summary of Laboratory and Clinical Thermometer Both laboratory and clinical thermometers gauge temperature at different scales. The common types of laboratory thermometers include liquid-in-glass, bimetallic strip, infrared, and electronic devices. The common types of clinical thermometers are digital, disposable, glass and mercury, electronic ear, and forehead devices.
What are the features of a laboratory thermometer?
Laboratory Thermometer Features Structure. The most commonly used laboratory thermometer is a glass tube about 30 cm long. Sensitivity. The laboratory thermometer is characterized by its high sensitivity. Fine bulb. The function of the bulb is to contain the thermometric substance. Rank. Temperature scale. Without valve. Resistance.
A laboratory thermometer is recognizable by its long stem with a silver bulb at the end. The silver color in the bulb normally indicates the presence of mercury . Mercury expands as the temperature increases, thus raising the reading, while decreasing temperatures contract the mercury, lowering the reading.