precautions while using laboratory thermometers

Thermometers utilize a range of physical effects to measure temperature. Temperature sensors are used in a wide variety of scientific and engineering applications, especially measurement systems. Temperature systems are primarily either electrical or mechanical, occasionally inseparable from the system which they control (as in the case of a mercuryinglass thermometer). Thermometers are used in roadways in cold weather climates to help determine if icing conditions exist. Indoors,thermistorsare used in climate control systems such asair conditioners, freezers,heaters,refrigerators, andwater heaters.[39]Galileo thermometers are used to measure indoor air temperature, due to their limited measurement range.

Read the directions included with the thermometer to understand the beeps associated with the thermometer.Some digital thermometers beep every few seconds to signify that its still reading the temperature, while others have a succession of beeps when the reading is finished.

Slip the tip of the thermometer into a disposable plastic sleeve. Available at drugstores, these sleeves are usually a onesizefitsall product. Internationally agreed temperature scales are designed to approximate this closely, based on fixed points and interpolating thermometers. The most recent official temperature scale is the International Temperature Scale of 1990. It extends from 0.65 K to approximately 1,358 K .

Take an axillary temperature under the arm by placing the tip of the thermometer into the hollow of the armpit. Hold the arm across the body until the thermometer beeps. Perform an oral temperature by placing the tip of the thermometer under the tongue and holding it there until the thermometer beeps.

Read the manufacturers instructions to understand how the thermometer works.Place a disposable cover over the tip of the thermometer, if it wasnt stored with one on. These plastic covers are available at any drugstore. clinical thermometer one used to determine the temperature of the human body.

Clean the thermometer after each use with an alcohol rub or according to the manufacturers directions.Even when using a disposable sleeve, its best to sanitize the thermometer to reduce the risk of spreading any germs. While an individual thermometer is able to measure degrees of hotness, the readings on two thermometers cannot be compared unless they conform to an agreed scale. Today there is an absolute thermodynamic temperature scale.

If a saved reading shows, follow the manufacturer instructions to set the thermometer back to zero. Operating principles of thermometers include the thermal expansion of solids or liquids with temperature, or the change in pressure of a gas on heating or cooling. Radiationtype thermometers measure the infrared energy emitted by an object, allowing measurement of temperature without contact.

Insert the tip of the thermometer into the ear canal, being careful not to push too far into the ear, and press the button. The reading will be immediate. electronic thermometer a clinical thermometer that uses a sensor based on thermistors, solidstate electronic devices whose electrical characteristics change with temperature. The reading is recorded within seconds, some having a red light or other device to indicate when maximum temperature is reached. Available models include handheld, desktop, and wallmounted units, all having probes that are inserted orally or rectally.

Its best to store a tympanic thermometer with a plastic cover on the tip to keep the reading mechanism from getting dirty or damaged. Laboratory thermometers are used in research and scientific applications such as monitoring experiments, maintaining a sterile work environment, calibrating other laboratory instruments, and testing materials.

Laboratory thermometers are devices used to measure temperature. There are many types of lab thermometers such as differential, mechanical, logging, etc. Laboratory thermometers are progressively providing digital reading displays and are inputcapable to computer and software programs for logging purposes. A laboratory thermometer can be used for a number of scientific applications and can be found across nearly all laboratories especially in pharmaceutical, environmental, food, and petroleum testing. While a lab thermometer can measure how hot or cold a sample or environment is, the range of measurement can vary widely between models.