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This section provides an overview for environmental testers as well as their applications and principles. Also, please take a look at the list of 19 environmental tester manufacturers and their company rankings. Here are the top-ranked environmental tester companies as of April, 2026: 1.DeFelsko Corporation, 2.Accuvin, 3.Delmhorst Instrument Co..
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Categories Related to Environmental Testers
An environmental tester is a device that simulates various environmental conditions to measure changes in the environment of the test object.
Environmental testing is used to verify the reliability of components and materials mounted on various types of equipment. Environmental testers are devices that artificially create various environments to which components and materials may be exposed.
Environmental testers measure the change and resistance of parts and materials in the environment they create. For example, we check the operation of parts before and after exposure to a given environment to see if there are any problems with their resistance to the environment.
Environmental testers are used in various fields to test the environmental resistance of various components and materials. In addition to testing the resistance of various components in use, environmental testing is also used to detect defects in the design and manufacturing of various components during development.
Environmental test results are also necessary for quality assurance. Furthermore, the results of environmental resistance in the use of various components serve as a guide for customers to select products at the time of purchase.
Various equipment and components have various regulations that must be observed depending on the environment in which they are used and the characteristics of the products. The domestic standards are JIS (Japanese Industrial Standards), while the global standards are IEC (International Electrotechnical Commission) standards. These standards have regulations for each type of equipment and operating conditions, and since environmental testing is included in these regulations, environmental testers are also used to determine whether a product passes or fails the standard.
Environmental Ttesters include temperature and humidity testers that change the conditions of temperature and humidity, and water resistance testers that spray water. This section describes the main types of environmental testers.
In temperature/humidity testers, various devices, parts, and materials to be tested are placed inside a temperature/humidity tester for testing. The equipment is then set to the upper and lower temperature and humidity limits specified in the product specifications and standards, and the test is switched to the upper and lower temperature and humidity conditions at regular intervals.
The operation of the equipment and parts is checked before the test and again after the test, and if the operation is confirmed to be the same as before the test or within the specified range, the test is completed.
In the thermal shock tester test, the temperature setting is switched between low and high temperatures for a short period to observe changes in the equipment and components. When environmental temperatures change rapidly, thermal expansion and contraction occur in individual components of parts and equipment. Failures such as cracks in joints and surfaces occur, which are caused by differences in the thermal expansion coefficients of the individual components. The degree of these defects determines whether the test passes or fails.
Water testers are used to evaluate the water resistance and water resistance of electronic components and small electronic products when subjected to wind, rain, or splashing water. Tests are conducted by sprinkling, fountaining, or flooding the test object.
Accelerated weathering testers simulate indoor and outdoor conditions such as sunlight, rainfall, temperature, and humidity to accelerate the deterioration of test objects. The tester performs indoor testing using an artificial light source and produces results in a short period.
Corrosion testers are used to examine the effects of gases, chemicals, acid rain, and salt water on test objects. The most famous tester is the CASS tester, which measures the degree of corrosion using a sodium chloride solution with copper chloride added to acetic acid.
Gas corrosion testers, which use corrosive gases such as hydrogen sulfide (H2S), sulfur dioxide (SO2), nitrogen dioxide (NO2), or chlorine (Cl2) to measure corrosion, are also often used.
Environmental testers are used to evaluate physical properties without controlling temperature or humidity.
1. Vibration Testers
Vibration testers subject equipment and components to vibration conditions that exceed those expected during transportation or in relatively vibration-prone locations such as factories. Operation is checked before and after the test, and the test is completed when similar results are obtained.
2. Drop Tester
A drop tester is a device that drops test items naturally while repeatedly maintaining the specified conditions to examine the impact and effects of dropping the test object. It is used to check the impact resistance of heavy cargo or packaging materials.
*Including some distributors, etc.
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DeFelsko Corporation is a manufacturer of coating thickness gauges and inspection instruments, located in Ogdensburg, NY, USA, and was established in 1965. The company offers a range of products, including, environmental gauges, soluble salt testers, ultrasonic wall thickness gauges, and analog & digital material hardness testers, used in various industries, including metals, fiberglass, and plastic.They continue to develop new products and technologies to meet the needs of customers. They also actively participate in several key organizations (SSPC, NACE, ASTM, ISO) to improve and promote the science of coating inspection.
Cincinnati Sub-Zero (CSZ), founded in 1940 with headquarters in the USA, is a manufacturer of static environmental testing chambers. The company's products include benchtop, reach-in, walk-in, and drive-in test chambers and industrial freezers. Cincinnati Sub-Zero (CSZ) offers services that include test chamber maintenance programs, upgrades, refrigeration retrofits, calibration, training, replacement parts, and repair across the USA. Their test laboratory is A2LA accredited and provides environmental testing services including temperature, humidity, vibration and shock, thermal shock, HALT and HASS, altitude, drop testing, and corrosion testing.
Atlas Material Testing Technology LLC, founded in 1910, is a manufacturer of standard instruments, specialized solar simulation, and high-speed illumination for use in the food and beverage, consumer electronics, paint & coating, UVC material degradation test, and graphic arts industries. The Mount Prospect, Illinois-based corporation has ISO/IEC 17025, AMECA, CRRC, FGIA, and Quality Management System certification. In 2007, Industrial Growth Partners purchased the company, and in 2010, it became a business unit of AMETEK Measurement, Communications & Testing, a Division of AMETEK's Electronic Instruments Group.
LaMotte Co. is a manufacturer of reagents and equipment used for water analysis. Founded in 1919, the company produces various electronic instruments like turbidity meters, portable test kits, and software at their 15 acre industrial park in Chestertown, Maryland. The company's products have applications in environmental education, the pool and spa markets, industrial water treatment, and soil testing. LaMotte Co. also provides clients with custom solutions, technical support, and local access through its partner distributors across North America, Asia, Europe, and Australia.
Accuvin provides rapid tests designed for the food and wine industry to perform field testing of liquids to help growers and processors ensure their food is up to their quality standards. All Accuvin tests have everything needed to conduct the test in the package. For over 20 years, Accuvin products have been utilized and trusted for their accuracy globally.
Thermotron, founded in Holland, Michigan, in 1962 is a supplier of environmental test equipment. The company's product portfolio includes environmental test chambers, vibration test systems, combined environment test facilities, environmental stress screening systems, and functional test & measurement systems. The company serves markets including Medical and Healthcare, Aerospace and Defense, Consumer Goods, Industrial Manufacturing and Construction and Building. They provide services including system start-up and on-site training, equipment repair, instrumentation system upgrades, preventive maintenance, and warranty.
Ai Si Li (China) Test Equipment Co., Ltd., established in 1988 and based in Dongguan City, China, is a manufacturer of inspection instruments and related products. The company produces temperature humidity test chambers and vibration shakers and simulated transportation testers. It also makes walk-in chamber temperature aging rooms, fast temperature humidity test chambers, temperature humidity vibration combined test systems, and thermal shock test chambers. It is authenticated by competent testing centers, including the National Measurement and Testing Center and South China Center of Metrology.
Hanna Instruments Inc. is an analytical and scientific instrument manufacturer, founded in Italy in 1978 and headquartered in Woonsocket, Rhode Island, United States. Certified with ISO 9001:2015 and ISO 14001:2015, the company offers a range of instruments, including photometers, refractometers, and thermometers. It also produces titrators, turbidimeters, and various process controllers, such as process colorimetric analyzers (PCAs). Supported by four manufacturing facilities, three research and development centers, and 47 sales offices worldwide, the company serves global customers across various industries, including agriculture, food and beverage, and wastewater treatment.
EMIC Corporation, established in 1971, is a manufacturer and retailer of temperature/humidity and vibration and mechanical shock measuring instruments used in electric & electronic, automobile, aeronautics, and environmental applications based in Tokyo, Japan. Their product portfolio includes environmental reliability test systems, electrodynamic vibration test systems, and vibration measuring instruments. The company also runs test lab centers in Utsunomiya, Saitama, Mishima, Hikone, and Thailand, where they offer contracted test services, including quality, reliability, and environmental test on temperature (humidity) chambers, combined environmental reliability test systems and vibration test systems.
ESPEC CORP., founded in 1947 and based in Osaka, Japan, is a manufacturer of environmental test chambers, listed as one of the Ministry of Economy, Trade and Industry (METI)'s Global Niche Top Companies Selection 100 in 2020. These chambers are designed to test the impact of temperature and humidity, rapid-rate thermal cycling, and thermal shock on materials and products. Additionally, the company offers Highly Accelerated Life Testing (HALT) and Highly Accelerated Stress Screening (HASS) systems to detect potential product weak links throughout their lifespans. These products find applications in various industries, including automotive, indoor farming, and digital communication technology.
Amprobe, founded in Everett, WA, in 1948 is a manufacturer of Ultrasonic Leak Detectors. The company's product portfolio includes battery testers, Electrical and HVAC Test and Measurement Tools, Digital Multimeters, Clamp Meters, and Wire Tracers & Cable Locators. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation. They also provide services including product selection, installation, preventative maintenance, troubleshooting, and repair.
Amprobe Instrument Corporation, began life in Long Island, NY in 1948 under the name Pyramid Instrument Company, later renamed in1960, is a manufacturer and builds rugged test and measurement tools. The company was acquired by the Danaher Corporation and moved its worldwide headquarters to Everett, Washington in 2006. It designs, manufactures and distributes products from an extensive line of clamp meters and digital multimeters to industry-specific tools for residential/commercial electricians, HVAC/R technicians, utilities and industrial maintenance professionals. Its tools undergo rigorous and intensive testing to ensure compliance with the latest regulations in Fluke's CSA-recognized lab for safety and accuracy.
Weiss Technik, established in Reiskirchen, Hessen in 1979 is an industrial machinery manufacturer engaged in environmental simulation systems such as climate solutions, clean room and containment solutions. Their product range includes environmental stimulation, product configurator, heat technology, air conditioning and pharmaceutical technology. The company has technical and customer service all around the world. Their engineers and designers develop and produce heating technology systems for virtually any field of application such as heating/drying ovens, clean room drying ovens, hot-air sterilizers, microwave systems and industrial ovens.
Nova Analytical Systems is a part of Tenova Goodfellow Inc and is based both in Hamilton, Ontario and Niagara Falls, New York. The company is a designer and manufacturer of dependable gas analysis equipment serving customers in a diverse range of traditional and emerging industries around the world. The company’s gas analyzing equipment is used in flue gas & emissions, power generation & hydrogen purity, hazardous area gas quality, and oil & natural gas quality, measuring levels of carbon monoxide, sulfur dioxide, and other chemicals.
PCE Instruments UK Ltd., started in 199 and headquartered in Manchester, UK, is a manufacturer and supplier of test instruments, equipment, and tools for weighing, measuring, and control systems. The company offers more than 500 test equipment, including analyzers, inspection cameras, meters, detectors, and sensors, with applications in various fields like data acquisition, electrical engineering, environmental science, building inspection, and food processing. Its manufacturing and development division is ISO 9001 certified, all its test instruments, equipment, and tools are factory calibrated, and the company also provides services for custom test instrument design, installation, and maintenance.
Ranking as of April 2026
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | DeFelsko Corporation |
9.5%
|
| 2 | Delmhorst Instrument Co. |
7.6%
|
| 3 | Accuvin |
6.7%
|
| 4 | Eclipse Tools |
6.7%
|
| 5 | LaMotte Co. |
6.7%
|
| 6 | Cincinnati Sub-Zero (CSZ) |
6.7%
|
| 7 | PCE Instruments UK Ltd |
5.7%
|
| 8 | Puritan Medical Products |
4.8%
|
| 9 | Nova Analytical Systems |
4.8%
|
| 10 | Amprobe |
4.8%
|
Derivation Method
The ranking is calculated based on the click share within the environmental tester page as of April 2026. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
6 | 46.2% |
|
Japan
|
5 | 38.5% |
|
China
|
1 | 7.7% |
|
United Kingdom
|
1 | 7.7% |
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