Natural Wet Bulb Thermometer

Natural wet bulb thermometer (ta, wb): Natural Wet Bulb Thermometer instrument consists of mercury-in- glass thermometer, whose bulb is covered by a highly absorbent fabric wick, woven cotton being the most suitable. A recommended range for the thermometer is -5°C to 50°C, with O.5°C graduations. The accuracy should be at least +0.5°C. The wick extends… Read More »

Heat stress indices

Heat stress indices: In order to assess the total heat stress imposed on man by any working environment, an integrated approach evaluating both the climate and non climatic factors which are likely to influence the, eat-exchange between man and his environment.. In view of this many heat stress indices have been evolved from time to… Read More »

Psych meter, Kata thermometer, Globe Thermometer

Psychometric – Instrument used for measuring air temperature and humidity: Psych meter, Kata thermometer, Globe Thermometer : The psycho-meter basically consist of two thermometers -a ‘dry bulb’ and a wet bulb’ – over which air passes at a certain speed. Dry bulb thermometer just a liquid (most frequently used liquid mercury) in glass thermometer. Wet… Read More »

Heat Stress Management in Industries

Heat Stress Management in Industries: Heat Stress Management in Industries: Problems of heat stress are very common in some industries such as Iron and steel Mills, glass and Ceramic Units; Forge shops, Foundries, Bricks and Tiles Factories, Thermoelectric plants;  Cements, Coke ovens, Laundries, Mines and many others. There are many work places in thee. units… Read More »

Ventilation Systems

Specification of Industrial Ventilation Systems To keep the air temperature low enough are work place to easel sooty to dissipate by conventions to prevent excessive humanity. The functions which ventilation has to perform can be classified as maintain the oxygen content of the air and to prevent C02 concentrations from rising, To prevent harmful concentration… Read More »

Colors and colour schemes for Warning Signs

Colors and colour schemes: Colors and colour schemes: The main thing is to US- colors with suitable light reflecting properties, but it is also important to employ colors and colors schemes which will be easy to “live with” Large expenses of vivid color may seem cheerful and effective at a casual glance, but often lose… Read More »

Lighting Maintenance

Lighting Maintenance: Lighting Maintenance: Unless a lighting installation is properly maintained, lamp depreciation and dirtee accumulation on the fittings will case an increasing loss of light, in some circumstances this can cut he illumination level by half in the space of only few months. When choosing equipment, make sure that it will be easy to… Read More »

Installation planning of Lighting

Installation planning: Installation planning of Lighting: Three main types of artificial lighting installation are used in factories and offices, namely: Uniform general lighting General, plus local supplementary lighting Localized general lighting. The choice depends on the natural and location of visual tasks to be performed. Uniform general lighting A uniform general lighting installation may be… Read More »

Lighting Systems in Industries

Introduction: Lighting Systems: Good lighting is becoming increasingly recognized as an important aid to management in achieving high productivity and in providing satisfactory working conditions for employees which will able them to work efficiently, accurately and safely with minimum fatigue. Basic requirement of Lighting system in industries: Make the task easy to see: Besides providing… Read More »

Welfare measures

Welfare measures: The concept of labour welfare is very broad and flexible. However, by any meaning, it aims at improving the living and working conditions of the workers and their family members. The Concept of Labour Welfare: The concept of labour welfare bears different interpretation from country to country and from time to time. According… Read More »