Sunday, November 28, 2010

Different types of Thermometers manufactured by JRM thermometers India

Thermometers can be divided into two separate groups depending on the physical basis of thermodynamic laws and quantities. But in the case of primary thermometers the temperature can be measured without any unknown quantities. These types of thermometers work based on state of gas, velocity of sound in gas.

Secondary thermometers are used because these are very convenient to use but these types of thermometers are much more sensitive than the primary ones. These thgermometers have to be calibrated against the primary thermometers to a certain temperature level or at fixed points of temperature. JRM are the largest Laboratory Thermometer Manufacturers of india.

Thermometers can be calibrated either by comparing them with other calibrated thermometers or by checking them against known fixed points on the temperature scale. The best known of these fixed points are the melting and boiling points of pure water. (Note that the boiling point of water varies with pressure, so this must be controlled.)

The traditional method of putting a scale on a liquid-in-glass or liquid-in-metal thermometer was in three stages:

Immerse the sensing portion in a stirred mixture of pure ice and water at 1 Standard atmosphere (101.325 kPa ; 760.0 mmHg) and mark the point indicated when it had come to thermal equilibrium.

Immerse the sensing portion in a steam bath at 1 Standard atmosphere (101.325 kPa ; 760.0 mmHg) and again mark the point indicated.

Divide the distance between these marks into equal portions according to the temperature scale being used.

These types of laboratory thermometers are manufactured by JRm thermometers and they are the largest laboratory thermometer exporters of india.

Bio-degradable Thermometer:

India’s First Mercury Free Thermometers Environmentally safe non toxic, Biodegradable Liquid. Accurate, Precise, Repeatable was manufactured by JRM thermometers. They are india’s first Bio-degradable thermometer manufacturers.

With SafeTherm we are working towards reducing the usage of mercury in scientific laboratories, classrooms, industries and in our society. Our aim is to provide alternative to mercury containing thermometers with environmentally safe, non-toxic, non-hazardous and biodegradable liquid filled thermometers.

SafeTherm thermometers are available in all typical range from – 20 °C up to 250 °C.

Minus Range Thremometer:

Minus Range Thermometer are liquid in glass thermometer with coloured spirit filled thermometers. The range of minus range thermometer is -50 - 100°C. This thermometer has a total length of 300 mm and the immersion length of minus range thermometer is 75 mm.

Metal Encased Glass Thermometers:

Metal Encased glass thermometers comes with yellow black or white one with liquid filled coloured spirit. Metal encased glass thermometers comes in a maximum range of 0- 600°C. And are available in sizes of 4//6/8 inches. And are mostly used in Ships, Diesel Engines, Pipe Lines, Tanks etc.

Thermometer - A temperature measuring instrument

Thermometer usually measuring tool to measure the hotness or coldness of a substance in a definite scale. The temperature can be read when the substance is brought into contact with the thermometer. This temperature measuring instrument use some change in material to indicate temperature. There are some effects to apply to these temperature measuring instrument , like change in physical properties and altered physical dimensions. One of the notable change that is noticed in these temperature measuring instrument is the change in the length of the material in form of expansion and contraction.

The most important element of a thermometer is the temperature sensor, i.e the bulb of the mercury thermometer.

.Usage of thermometer

There are number of usages for thermometers. Thermometer usually use different physical; effects to measure temperature of a particular substance. These type of temperature are used in engineering and scientific applications. Temperature controls are in separable in case of liquid in glass thermometers as these are either electrical or mechanical. Liquid-in-Glass Thermometer Manufacturers in India are best manufactured by JRM Thermometers. In the Earth’s atomosphere specially in the fields of meteorology and climatology glass thermometers, alcohol thermometers and infrared thermometers are well exposed in the atmosphere for different industrial needs. Indusrial thermometer exporters like JRM Thermometers make it possible with their utmost precision and accuracy level. Even airplanes use thermometers and hygrometers to measure if there is atmosphere icing along the flight path. Even thermometers are also used to predict weather forecasts. And in climate control systems like air –conditioners, freezers, refrigerators and water heaters thermistors are used.

Thermistors and infrared thermometers are also used during cooking meat , to now the mat is properly cooked or not, if the temperature remains constant for more than four hours or more between 5 °C and 57 °C , then the bacteria can multiply and can ruin the food. Thermometers are in candy manufacturing also. Mediacl Thermometer such as Liquid-in-Glass Thermometer, glass thermometer , pill thermometers and liquid crystal thermometers are used in health care sectors to measure fever. Liquid –in glass thermometers are also used to measure the temperature of fish water tanks , and JRM thermometers are the finest Glass Thermometer Manufacturers India and Liquid-in-Glass Thermometer Manufacturers India.

JRM thermometers the most trusted name in the market are the manufacturers of Industrial, laboratory, Glass Thermometer and also they are the largest exporters of thermometers from India.

Friday, May 28, 2010

JRM Thermometers – The Largest manufacturer of Industrial and Laboratory Thermometer

JRM has a good name in the market in manufacturing all types of thermometers ranging from Thermal power industry thermometers, steel industry thermometers, High precision thermometers, metal encased thermometer, Liquid in glass thermometers, electric contact thermometers. They also have reputed name as the largest laboratory thermometer exporters

Thermometer / Thermocouple Calibration:-

The definition of calibration is the comparison of two instruments, one of which is the instrument-under-test and the other is the reference. Calibration may or may not necessarily involve adjustment of the temperature measuring instruments-under-test.

Therefore, calibration does not always involve adjustment. If your instrument can be adjusted, then by all means, do so. If not, you should be aware of (and record) the instrument's deviation from the reference and use this information to compensate for the deviation.

We once had a temperature indicator that couldn't be adjusted. When we calibrate it, we find out how much it deviated from our reference. For example, if it reads 35°C vs our reference of 37°C, we put a sign near the instrument that instructs the user to add 2°C to the display to get the correct temperature. Of course, I got rid of that instrument as soon as possible .

So, my advice is for you to calibrate the thermocouple and the transmitter/controller/indicator as a unit, just as several posters suggested .

Thermocouple calibration is useful if you need better accuracy than +/-1°C, doing so may give you +/-0.1°C accuracy.

Key Features of JRM Thermometers:-

Glass Stems & Bulbs –

All the Thermometers are made from the highest quality of Glass Capillary that is free from stone, strise and irregular bores.

Permanent Accuracy-

All the Thermometers are skillfully annealed & artificially aged before graduation to ensure permanent accuracy.

Safety Chamber—

All the Thermometers are provided with safety chambers for precaution against breakage in the case of over heating and to facilitate rejoining of mercury column in case of separation in transit or in use.

Fillings—

All the Thermometers are either filled with Triple Distilled Mercury, Red/Blue Coloured Thermometric Liquid or the new Bio-Degradable & Non-Toxic Liquid.

Pressure Filling—

The Thermometers are pressurised with Nitrogen gas above the column wherever necessary.

Graduations—

Thin clearly cut and deeply etched graduations and distinctive figures accurately placed are done by the most up to date Calibrating and Graduating Machines.

Calibration—

All the Thermometers are calibrated against Standard Platinum Resistance Thermometer having least count of 0.001C and various other High Precision Thermometers. These standard thermometers are periodically tested and calibrated by National Physical Laboratory, New- Delhi. Calibration is carried out in special baths, which are scientifically designed, electrically heated & thermostatically controlled.

Accuracy --

All the Thermometers are guaranteed to be accurate within the tolerances required when they leave our works & when tested under correct conditions

Lastly we would like to conclude, that JRM thermometer, the largest Industrial thermometer manufacturers and also finest and most prestigious laboratory thermometers manufacturers of India and Thermometer manufacturers of India.