sigma test & research centre Badli, Delhi

Electronic products need to be checked for safety-related issues such as overheating, electrical shock, vibrations and explosion. At Sigma, we offer testing solutions which are fast & efficient. Inspection and certification services for electronic products are conducted in our state-of-the-art laboratories. Ranging from household appliances, IT equipment to electronic toys, amusement and gaming machines, we provide quality testing solutions literally for all varieties of electronic and electrical products. We check products for their safety, quality and performance standards. The major categories under electronics and electrical products that are tested in Sigma Test & Research Centre include: Household Electrical Appliances- Safety of household appliances such as refrigerators, cooking & laundry appliances, vacuum cleaners, hairdryers, etc. is important. Sigma is one such reliable place, where you can get a complete range of testing services to meet regulatory and technical requirements across the globe. Appliances are tested for their energy consumption, efficiency, class labelling and electrical safety. RoHS Test- Sigma has an experienced team of experts in performing RoHS2 compliance testing. We use spectroscopy and wet chemistry methods for determining the concentration of hazardous substances in Raw materials of Final products. Ingress protection- Ingress is defined as a product’s resistance to water, dust and foreign objects. Ingress protection testing helps in determining the susceptibility of a product to solid particles (sand or dust), water ingress and ingress to other foreign objects. Most commonly tested products include medical devices, light fixtures & sealed items.

Chemical testing for automotive components: Vehicles face latent threat each time they hit the road, although the inherent danger on roads cannot be eliminated completely, chemical testing of vehicles and its components can ascertain that they function to the best of their ability. We offer tests which provide highly accurate chemical analysis of metals, plastics and other non-metallic products to ensure that your vehicle adheres to stringent industry standards and conform to the required safety rules and regulations. Alkali Resistance Test: Automobiles like any other substance or article need cleaning and washing from time to time. Effective cleaning involves the spraying of cleansing agents which contain strong alkaline substances. Spraying of alkaline cleansers on high pressure tends to wither the surface of anodized aluminium coating over the metallic bodies of the vehicle. Anodizing is a preventive measure through which aluminium components can be saved from corrosive impacts of alkaline substances. This process involves creating a coating over the metal by oxidizing it through undertaking electrolysis in sulphuric acid. We offer services to determine the strength of the anodized layer formed through this process and its ability to resist corrosive impacts inflicted by alkaline substances. Fuel Resistance Test: Liquid fuels like petroleum and diesel are used to derive energy for operation and petroleum-based products are used in the composition of motor oils in a vehicle. Also, they are always prone to leakages and spillage of fuel and fuel-based products. Fuels are highly flammable, hence it becomes critical for vehicle manufacturers to ensure that in case of spillage or leakage the vehicle is equipped to prevent potential ignition damage.

Automotive Headlamps and Luminaire Testing: Good & effective automotive lighting in vehicles helps drivers get visibility on roads during night time, give indications to pedestrians and fellow drivers close by about their direction, size and speed. It is, therefore, essential that lighting infrastructure in vehicles performs optimally. We offer comprehensive and reliable tests for headlamps, tail lamps, indicators, reflectors, centre high mount stop lights, warning lights and interior lights in order to ensure their effective functioning and adherence to industry standards. Battery Testing: The battery is as important in the functioning of a vehicle, as the heart is to any living creature. The battery provides power to all electrical components of a vehicle like the heart pumps blood to the body. Ascertaining the life expectancy, condition and state of operation of the battery is essential to determine the well-being of the vehicle. We provide all types of battery testing facilities which will not only help determine the life span of the vehicle but also help in prolonging and improving its condition. Our tests also verify that the battery used by car manufacturers adhere to industrial norms and safety standards. Tags: Automotive Parts Testing Lab in India | Automotive Parts Testing Lab in Delhi | Automotive Parts Testing Lab in Karnataka

Salt Spray Test: A large part of an automobile is made up of metals like steel, aluminium and iron which often have to sustain the damage inflicted by environmental corrosive agents like water, moisture, mist, humidity and vapours. It is significant for vehicle manufacturers to ensure that the quality of the metals and the protective coatings being used are durable enough to withstand these corrosive attacks. In our Lab facility, we undertake testing services to measure the strength and sturdiness of the anti-corrosive films applied over the metallic components of the vehicles. Testing ensures that the protective film coated over the metals conforms to the safety standards and adheres to the guidelines of the regulatory bodies. Salt Fog Testing: Salt fog is a type of spray test in which a vehicle is kept in a chamber where it is sprayed with salt fog incessantly at a particular temperature. This helps to evaluate its resistance power against corrosive salts and to determine the durability of the protective film applied to the body of the vehicle and its counterparts. We offer highly reliable salt fog testing services to verify the suitability of the protective films on vehicles in a particular simulated environment.

Endurance Test: Automobiles have to function in extreme climatic conditions, battling numerous foreign substances like dew, sand, mist, UV rays and others without breaking down. Therefore vehicle components must be equipped to endure their effects and operate with optimum efficiency. We, in our sophisticated life cycle testing lab facility, provide accurate testing services to examine the degree to which automobile components can sustain the impact of these substances and climatic conditions. This activity ensures vehicle owners about the quality of products being utilized in manufacturing the vehicle. Good quality components are sturdy and strong which enable them to withstand impact from environmental and other kinds of damage. UV Light Exposure: Rapid reduction in the level of stratospheric ozone has paved the way for increased ultraviolet radiation. These radiations are not only causing damage to the environment and their beings but to electronically operated devices as well. Automobiles routinely encounter these radiations because of which their components face deterioration. It is mostly the outer body of vehicles that come in direct contact with sunlight and ultraviolet rays, and these parts are primarily made of metals and alloys. UV rays impair the protective film coated over the metallic components and fade their colour coat which exposes the bare metal to the extreme harshness of sunlight and UV radiation. In our sophisticated facility, we offer automotive life cycle testing and analysis services in which we examine the protective films in an environment by simulating UV radiations and measuring their ability to endure such a situation without incurring any substantial damage.

Tensile strength: Tensile strength of a product is the maximum stress or force it can endure before it reaches its breaking point. For vehicle manufacturers, it is essential to know how sturdy their products actually are before they pass on the product to consumers. The body of a car is predominantly made up of metal, plastic and glass, which are subjected to all sorts of weights, forces and stresses to measure their endurance capacity. Vehicles require need to have considerable tensile strengths so that they can sustain themselves in case of collisions and accidents. We have facilities that to provide highly reliable tensile strength testing for each and every component of vehicles in order to ensure they conform to the safety and industry standards. Impact Test: Vehicles at all times face latent collisions, accidents and crashes which could lead to fatality of the persons sitting inside. For vehicle manufacturers, it is quintessential to ensure that the components of the vehicle exhibit minimum damage when they encounter such accidents. To ensure this, we have a testing facility which offers tests to ensure the strength and durability of the components in case vehicles bump collide with the external objects. This test helps vehicle manufacturers to conform to safety standards prescribed by the regulatory bodies. Ball Drop Test: A considerably large part of a vehicle is made up of glass, which intrinsically is vulnerable to environmental threats like rocks, pebbles and other heavy objects. For accident-prone vehicles it is essential to ensure that the glass being used in the windshields and windows is sturdy and durable, therefore laminated safety glasses are used. Further to verify if the safety glasses are fit for the purpose they are being used, a ball drop test is done on them. We prove a sophisticated facility for the ball dropping tests on glasses for vehicle manufacturers.

Noise Measurements: Over the years, the numbers of vehicles on the roads have been increasing exponentially are equally, so are the noise pollution levels. Vehicles cause noise pollution in numerous ways, through their the exhaust systems, engines, horns, brakes and sound systems. Hence, it becomes critical to keep a check on the volume of the noise produced so that they conform to regulatory standards. We offer all the tests which are designed to measure your vehicle’s noise emissions and ensure that it is in line with the required safety standards. High-Pressure Spray Testing: A form of spray testing, the high-pressure spray is a method of testing vehicles against forceful water sprays. This method of testing ensures that the vehicle and its components are sturdy enough to sustain this force and do not face any kind of breakdown or component failures, in any situation. Vehicles on a regular basis are cleaned with water splash or spray which sometimes enters internal components which are required to be free from water permeability; this test ensures no such situation arises. Flammability Tests: Vehicles are highly prone to catching fire as they are powered by fuel which is highly inflammable. Their internal components must be equipped to sustain in case of fire. Components like seat cushion, seatback, seat cover, seat belt, headrest, armrest, movable convertible top, all decorative panels and many others parts must have the ability to safeguard themselves from fire as their flammability has a direct effect on the safety of the people inside the vehicle.

A major part of any automobile is made up of steel, iron or aluminium and so is prone to corrosion by moisture, humidity, mist, water vapours or water. We conduct salt spray testing in our laboratories to determine the strength & sturdiness of the anti-corrosive film that is applied over the metallic parts of the vehicle. Technical experts at Sigma adjust the environmental conditions such as temperature & humidity, to simulate specific weather and working conditions. It is important to assure that the metal employed is of good quality and protective coating applied to it is durable enough to withstand the harmful effects of corrosion. Why test for corrosion resistance? To determine the corrosion resistance of the finished product metal To measure corrosive inclination on the scratching of the metal surface To detect deformation due to corrosion and the adhesion of the coating Evaluate corrosion resistance in a humid environment (temperature, salt fog, moisture) The salt spray test procedure is conducted in a salt spray room or cabinet, which have both temperature and humidity regulators. Salt spray test standards are designed in a way to examine the deterioration level of the material under consideration. The Salt spray test helps ascertain resilience levels of metal objects and surfaces, the material when these comes in contact with salt. Through this accelerated corrosion test, we examine the versatility of the test sample in the presence of salt. We conduct Salt spray testing in our labs to ensure that the metal coating on your automotive components is designed as per the guidelines laid by the regulatory bodies and safety standards.

Colour Fastness Test: Over time materials like textiles, leather and rexine used in seat covers, armrests and decorative panels deteriorate and their colours fade and texture deteriorates which majorly kills the look of the interiors. To ensure that the fabrics and materials being used maintain their colour and lustre for a long period of time, it is essential for vehicle manufacturers to subject them to a simulated environment where they are made to endure the damage caused by regular wear and tear. This facility is provided in our testing laboratory which helps determine the material’s resistance against usual environmental damage as well as the materials ability to sustain its colour. Dew Formation Test: Automobiles have to operate in all kinds of weather conditions and therefore they have to be equipped to function in all such circumstances. Humid weather is one of the conditions which can cause failure in electronic devices. When there is high humidity in the weather, dew formation is a common phenomenon, which is evident. when you start observing moisture droplets within screens of the machine. when water vapours coming in contact with cold objects, they convert into liquid droplets called dew. Such dew formation when formed in-vehicle components, can hamper their functioning. Gloss Value test: The bodies of vehicles are prone to damages like scratches, abrasions and paint chipping during their day to day operational life. This phenomenon causes the lustre and gloss of the paint coating on the outer body of the vehicle to get damaged. Gloss-less paints hamper the look of the exterior body of a vehicle. The gloss value of the paint applied on a vehicle can be measured by the amount of light reflected back when it is directed towards a given part in a particular angle.

Vibration testing mimics the conditions that a product or structure might see during its lifetime while under a test environment. Intended to ensure that products are robust and perform safely during operation or transit, vibration testing detects performance issues and potential failures before they start. It is usually distinguished on the basis of mechanical shock testing and its application for different periods which may vary from a few minutes to weeks. Moreover, in order to produce a defined vibration, we use electromagnetic vibration exciter (aka a shaker). This helps in converting electric signals into mechanical movements which are further controlled to maintain the vibration force or level as per specified standards. Why Vibration Testing? Vibration tests are done on various equipment but there are many reasons behind the application of this test. Two of the major reasons are: Rather than the actual vibration level, the response to the vibration force is recorded in order to determine the dynamic properties of the object. Thus, we perform our best to find out the ability of the object to transmit vibration and its modes at resonance. Furthermore, at a prescribed vibration level, the vibration test is necessary to compare the transducers to be calibrated and the reference transducer. The purpose behind vibration testing Usually, the tests are held with the extremely severe vibration level ever recorded. The major purpose behind this action is to determine the stimulated life of the product by performing the test for hours, days, and even weeks. Such severe tests include Highly Accelerated Life Tests (HALT) and Environmental Stress Screening (ESS) that help in reporting the units that ensure the hardness of the product to the customer, once the product survives the test without losing its expected remaining life.

10% Fine Value: All aggregates are required to meet a minimum strength valve, as defined by the 10% value test. This and other specifications ensure that only the highest quality materials are being used on construction projects. Test Method: IS: 2386 (P-4)1963 Alkali Aggregate Reactivity: Alkali-aggregate reaction is the term mainly referred to a reaction which occurs over time in concrete between the highly alkaline cement paste and non-crystalline silicon dioxide, which is found in many common aggregates. This reaction can cause expansion of the altered aggregate, leading to spalling and loss of strength of the concrete. Test Method: IS: 2386 (P-7) 1963 Chloride Content: The total chloride content of aggregate is usually measured to assess whether the aggregate’s contribution to the total chloride content of a concrete mix will be low enough to prevent the early onset of corrosion of any embedded steel reinforcement. Test Method: IS: 4032-1985 Clay Lumps and friable Particles: This test helps in determining the percentage of clay lumps and friable particles in aggregate. Clay lumps in aggregate shall be defined as any particles or aggregation of particles which when thoroughly wet can be distorted when squeezed between the thumb and forefinger, or will disintegrate into individual grain sizes when immersed for a short period in water. Friable particles are defined as particles which vary from the basic aggregate particles such, that they may either readily disintegrate under normal handling and mixing pressures, imposed upon them by construction procedures, or break down after being incorporated into the work. Test Method: IS: 2386 (P-2) 1963

Apparent Porosity and Density: This test helps in determining the porosity and density of bricks to be used for the construction of load-bearing walls. The method involves measurement of dimensions and mass to determine density, followed by measuring the increase in mass when soaked in water for a standard period of time. Test Method: IS: 1528 (P-8,9)1974 Water Absorption Test: In this test, we assess the amount of water that a brick can absorb is measured by the water absorption test. There is no distinct relationship between water absorption and the water-tightness of walls. The results of water absorption tests are used by the brick manufacturer for quality assurance. Test Method: IS: 3495 (P-2)1992 Permanent Linear Change Test: This test helps in determining the permanent linear change of refractory brick when heated under prescribed conditions, which will measure any potential shrinking when used for load-bearing walls. Test Method: IS: 1528 (P-6)1974 Abrasion Resistance Test: The abrasion resistance of a refractory material provides an indication of its suitability for service in abrasion or erosive environments. Test Method:IS: 5688-1982 Creep Deformation Test: Creep in compression (CIC) refers to the percentage of shrinkage of a refractory test piece under a constant load and exposed to a constant high temperature over a long period of time. Test Method: IS: 1528 (P-18) 1993

Construction Material In today global markets and increasing emphasis on quality, need for laboratory data has increased many folds moreover and top of that accuracy and reliability of data is also an equal concern. Our construction material engineering and testing credentials speak for themselves. Our professional engineers have vast experience and understanding of construction materials and construction practices. Our team of engineers and technicians help our clients anticipate and minimize potential issues and delays. Our Building Material Testing laboratories are equipped with the latest sophisticated testing equipment. Our services include not only Building and Road material testing services but also engineering observations, structural inspections etc. STRC has experience in a testing a wide range of construction materials, including Cement, Concrete, Aggregates, Admixture, Fly-ash, Masonry, Tiles, Wood, Steel, Aluminium, Bricks, Quarry stones, WMM, GSB and much more. Our team of consultants and technologists create customized testing programs to meet the demands of manufacturers having proprietary products. When taking a new or revised product to the market, having it validated by a reputable independent test Laboratory will increase its acceptance in the marketplace.

Chemical Analysis Chemical analysis of hardened concrete can provide information about the mix constituents and possible causes of deterioration. Standard methods can be used to find the cement content and the original water/cement ratio, but many other properties can also be established; Cement Content and Aggregate Cement Ratio, Cement Content and Pulverized fuel ash/fly ash (PFA) content, Cement Content and Slag content, Water/Cement Ratio, Aggregate Grading, Determination of the presence of High-Alumina Cement (HAC) are some of the tests we conduct under chemical analysis. Test Method: IS: 4032-1985 Compressive Strength Test: The most common strength test, compressive strength, is carried out on a 50 mm (2-inch) cement mortar test specimen. The test specimen is subjected to a compressive load (usually from a hydraulic machine) until failure. Test Method: IS: 4031 (P-6) 1988 Fineness Test: The fineness of cement has an important bearing on the rate of hydration and hence on the rate of gain of strength and also on the rate of evolution of heat. Greater fineness increases the surface area available for hydration, causing greater early strength and more rapid generation of heat. Cement fineness plays a major role in controlling concrete properties. The fineness of cement affects the place ability, workability, and water content of a concrete mixture, much like the amount of cement used in concrete does. Test Method: IS: 4031 (P-2)1990

Design Mix: This test helps in determining the suitable ingredients of concrete and determining their relative amounts with the objective of producing a concrete of the required strength, durability, and workability as economical as possible is termed as concrete mix design. It involves studying properties of Aggregate, Cement, Water & Admixture (if any), and is used to determine the proper Concrete Mix Design. Test Method: IS: 10262 Ultrasonic Survey: Ultrasonic concrete testing is based on the pulse velocity method to provide information on the uniformity of concrete, cavities, cracks and defects. The pulse velocity in a material is directly proportional to its density and its elastic properties which in turn depends on the compressive strength and the quality of the concrete. It is, therefore, feasible to obtain information about the properties of components by sonic investigations. Test Method: IS 13311 (Part 1) Chloride Content: Measuring the calcium chloride content of concrete is used to determine the dryness of concrete. This test is useful to tell if the concrete is ready for projects such as installing flooring on top of the concrete slab. Though some conditions can alter the results, such as the seasons of the year, the porosity of the concrete, or the mixture of the concrete, a calcium chloride test serves as a good indicator of the usability of concrete. Test Method: IS: 6925-1973 Chloride Permeability: The chloride permeability of concrete subjected to static and repeated compressive loading is evaluated by using this test method. The test results indicate that the chloride permeability of concrete subjected to static and repeated loading at a gradually increasing rate and its residual strain. This test covers the determination of the electrical conductance of concrete to provide a rapid indication of its resistance to the penetration of chloride ions. Test Method: AASHTO T277

Calorific value (Gross/Net): The calorific value of a fuel is the amount of heat released by its combustion – under regular state and constant pressure. Proximate analysis – Moisture, Volatile Matter, Ash and Fixed Carbon: Proximate analysis indicates the percentage by weight of the Fixed Carbon, Volatiles, Ash, and Moisture Content in coal. The quantity of volatile combustible matter and fixed carbon directly play a part in the heating of coal. Fixed carbon plays a significant role in heating the coal during burning whereas ignition of fuel is influenced by volatile matter content. The ash content also plays an important role in designing furnace grate, pollution control equipment, ash handling systems of a furnace and combustion volume. Ultimate Analysis: The ultimate analysis indicates the various elemental chemical constituents such as Carbon, Hydrogen, Oxygen, Sulphur, etc. It helps understand the amount of air necessary for the composition and volume of the combustion gases. This information is needed for the measurement of flue duct design, flame temperature, etc. Ash Analysis: Ash content of coal is the non-combustible residue left after coal is burnt. It represents the bulk mineral matter after carbon, oxygen, sulphur and water (from clays) has been driven off during combustion. When the coal is thoroughly burnt, ash material is quantified as a percentage of the original weight and this output is analysed. Ash Fusion Temperature Analysis: The behaviour of coal’s ash residue at high temperature is a critical factor in selecting coals for steam power generation. Most furnaces are designed in a manner that can remove ash residue. Coal ash that converts into a clinker a hard glassy slag, which usually requires cleaning and is unsatisfactory. By removing molten liquid, furnaces can handle the clinker. In a high-temperature furnace, ash fusion temperatures are analysed by viewing a moulded specimen through an observation window.

A clean and safe environment is a pre-requisite for good health and quality of life. Sigma Test & Research Centre focuses on delivering analytical services that address current environmental analysis issues and develop new solutions for challenges that the market and our clients anticipate facing in the future. Our services include testing of water, air, soil, waste and other products to assess their quality and impact on health and the environment. We provide a full range of environmental consulting & testing services to municipal, industrial, household & private concerns.

We offer critical ambient air testing services. Our services include ambient air, stack emissions, noise, soil, sludge, effluent, generator and engine exhausts, volatile compounds, semi-volatiles, hazardous air pollutants, air toxins, metals and particulates. We also offer ambient air analysis and stack emission monitoring.

We offer critical Stack Emission Testing Service which is appreciated for flexibility and offering the most effective outcome. Excessive production of paints, plastics, printing inks and adhesives give rise to excessive stack emission. We test for stack emission with our requisite tools & equipment. Our mission is to help manufacturers cope up with the health, safety and environmental issues.

Our Water Testing Services are well appreciated in the market. Over the years we have become synonymous with quality service providers in this domain. We leverage our cutting edge tools and equipment for testing water. Today we are a name to reckon with our professional handling in these critical areas. Our testing range offers critical solutions for all applications and budgetary profiles.

Unwanted sound is called noise. Environmental noise is evaluated by comparing a measurement or prediction of the noise to one or more criteria. There are many different criteria and ways of measuring and specifying noise, depending on the purpose of the evaluation.