The thermometer is an instrument, as we said, used to measure the temperature, the most common presentation is that it has glass, this glass tube contains within it another small tube made ​​of mercury, which dilates or expands according to the temperature changes measured. To determine the temperature measured, the thermometer has a carefully graduated scale which is strictly related to the volume occupied by the mercury in the tube. There are many ranges of thermometers, today we can find a presentation a little more modern digital type, but does not change the internal mechanism.

Temperature scales and special models

This device is commonly used to measure or take the temperature of an individual in the same way, the thermometer used to measure temperature environments and in animals, as well as some household appliances. With respect to the temperature it measures, the scale most commonly used worldwide is the Celsius , it measures the temperature in degrees Celsius and was given this name by its creator Andrew Celsius.

There are nonetheless used other scales but less so: Fahrenheit, Reaumur (now obsolete) and Kelvin , also known as absolute temperature, this type of scale is specifically used in laboratories, laboratory thermometers are usually made ​​with two or more scales . In addition to digital thermometers or glass, there are more ranges that are used today, the thermometer resistance is one of them. The same consists of a platinum wire whose electrical resistance is varying as the temperature does. We can also mention the pyrometer , these are thermometers that are used exclusively for measuring high temperatures. Then we name the thermocouple , a device used to measure temperatures with a system based on the electromotive force which is generated when heat welding two different metals. Finally, in the widest known and used in thermometers, we have the bi-metal strip thermometer , it is composed of two layers of metals whose expansion coefficients are very different, mainly used as a temperature sensor thermohygrographs.
In addition Conventional thermometers are listed above are what is called special thermometers , among them we find the globe thermometer, which is used to measure the radiant temperature and consists of mercury that has the bulb inside a hollow sphere of metal painted black. The aim of the sphere is absorbing radiation from objects that are around and are warmer than the air, emitting radiation at the coldest. This results in a measurement that considers the effect of radiation. Its uses are related to the convenience of checking dela individuals.

Then there is the wet bulb thermometer is used to measure the flow of moisture on the wind chill, it is used with an ordinary thermometer and thus forms a psychrometer. Psychometricians are used for variables such as vapor pressure, relative humidity and dew point. Finally, we have the maximum thermometers are used to record the highest temperatures of the day, this is a mercury thermometer that has a narrowing of the capillary near the reservoir or bulb. When the temperature rises, the expansion of all the mercury bulb is such that it expires the resistance of this narrowing, while when a low temperature, the mercury mass shrinks, the spine is broken by this narrowing and its free end lets us know the maximum TEMPERATURE. Its scale has a division of 0.5 ° C and its scope goes from -31.5 to 51.5 º C.

II. Resistance thermometers
Resistance thermometers based temperature assessment in a platinum wire embedded within the thermometer. This wire is connected to an electrical resistance that changes depending on temperature. It’s a thermometer that is very slow in taking temperature, but accurate. It is often used to take the temperature outside.

III. Thermocouple or thermocouple (contact thermometer)
These thermometers measure temperature from an electrical resistance that produces a voltage which varies with temperature connection. It’s a thermometer takes the temperature quickly and are often used in laboratories.

IV. Non-contact thermometer or pyrometer
This is the latest in thermometers and temperature measurement is based on heat radiation given off by objects (each object has an emissivity concrete) when heated. They are also called infrared thermometers and used, among other things, to measure temperatures or moving objects or are at a distance. The great advantage of this type of thermometer is not touching the object required and can instantly know the temperature in the digital display.

V. Bimetal Thermometers

These thermometers are made of two metal plates of different coefficients of expansion. When temperature change, one of the two metals are curved rather than the other and the movement is translated into a needle which in turn marks on a scale of temperature.

VI. Gas thermometer

Can operate at contant volume or pressure contact and due to its size, price and complexity are only used as laboratory standard thermometers in order to calibrate other thermometers because it is a very accurate temperature measurement.

VII. Digital Thermometers
An electronic circuit takes the temperature information is sent to a microchip which processes and displays it on a digital screen numerically. They tend to be very common for many different applications in the home, medicine, industry .. to be economical, fast,.

Takes forehead, navel or armpit readings Fahrenheit or Celsius digital LED display Over 10,000 readings using 4 AAA batteries (not included).

FDA approved Instantaneous accurate readings. Totally hygienic needing no expensive probe covers. Non-invasive, non-irritating. Accurate to within +/- 0.4°F with normal usage. Easily read ambient temperature and that of other objects as well.
Thermofocus is the most modern, advanced and safe device to measure body temperature. It is both convenient and easy to use.

Indeed, it is the first non-contact medical thermometer. The device enables the temperature of adults and children to be taken without touching the skin, simply by moving the thermometer close to the forehead at the distance indicated by the device. With Thermofocus there is no need to place the thermometer in any part of your or your babys body.

A sleeping baby or patient will not be woken when Thermofocus is used nor will they be caused any discomfort by the device if they are awake. Warranties are covered by KIDZ-Med only.

The thermometer ThermoScan Braun (R) Ear is used by pediatricians in the United States more than any other brand, according to a recent national survey (1). This advanced thermometer has patented technology features, such as its pre-warmed tip and positioning guidance system that ensures accuracy at all times. The thermometer ThermoScan Braun have also proven more accurate than measurements of rectal (2) and the temple (3). The thermometer ThermoScan Braun (R) Ear is not only used by most pediatricians, but also by mothers more than any other ear thermometer. (4)
As with seasonal flu, fever is one of the early symptoms of H1N1 influenza virus. The monitoring of fever is especially important for people with an increased risk of infection, including infants, children, pregnant women and the elderly. The ear thermometer measurements are preferred by pediatricians because they are fast, accurate, easy to use and hygienic. The eardrum shares blood supply to central temperature control in the brain, therefore, changes in body temperature are reflected in the ear rather than on any other body part.

The ThermoScan Braun Ear Thermometer features a multiple memory function, Allowing you to monitor the progress of a fever, Which can be important when communicating with a doctor. The thermometer also comes with disposable lens filters, Which reduces the transmission of germs. The lens filters should be changed after each use.

The American Academy of Pediatrics recommends that any child younger than 3 months who has a fever should see a pediatrician. An ear reading of 100.4 degrees F or higher is generally considered a fever. For adults, the WHO recommends that a person should seek medical care if a fever continues more than three days.

The Thermoscan Ear Thermometer is manufactured by Kaz, Inc. under a license to the ‘Braun’ trademark. ‘Braun’ is a registered trademark of Braun GmbH, Kronberg, Germany.

(1) Based on a survey of pediatricians in the United States. 2009, March. Arendt Consulting. Pediatrician Thermometer Claims substantiation.

(2 / 3) Measurements in detecting temperature changes. Nimah M et al, “Evaluation of infrared tympanic Thermometry. . . Pediatric Critical Care Med 2003, 4 (3): A74

(4) Based on syndicated ear and temple thermometer data.