Some well-known companies are:

ArtisanTG: Provides organizations with test & measurement equipment and support to extend the life of their critical industrial, commercial, and military systems beyond obsolescence with top-talent engineers and customer service specialists who help ensure essential systems' continued uptime and sustainability. We do so by providing expert maintenance support.

Keysight Technologies: Keysight is a top electronic measurement company offering products and solutions across various industries.

National Instruments: Offers hardware and software solutions for test, measurement, and control systems.

Tektronix: Specializes in test and measurement equipment for use within the electronics industry, such as oscilloscopes, signal generators, and spectrum analyzers.

Rohde & Schwarz: Global provider of test and measurement solutions, serving industries including wireless communications, aerospace, defense, and automotive.

Anritsu: Offers test and measurement solutions in the telecommunications, semiconductor, and automotive industries.

Fluke Corporation: Specializes in electrical test equipment like multimeters, clamp meters, and thermal imagers.

Advantest: Provides semiconductor industry testing and measurement equipment.

Agilent Technologies: Solutions for aerospace, defense, electronics, and life sciences industries.

EXFO: Provides telecom testing and measurement solutions.

These are only some of the many companies offering test and measurement systems solutions.

Here is an essential list of Measuring and Test Equipment:

Multimeter: This device measures electrical properties such as voltage, current, and resistance.
Oscilloscope: An oscilloscope displays and analyzes signals within electronic systems over time - for instance, voltage over time.
Function generator: A device used for testing electronic circuits using electrical waveforms.
Power supply: An electrical source used to power circuits during testing or operation.
Spectrum analyzer: A tool that measures and displays a signal's frequency spectrum.
Digital caliper: An accurate way of measuring distance or thickness. Thermometer: Used for temperature measurements.
Pressure gauge: Instrument used to monitor air or water pressure within systems such as buildings or water treatment plants.
Lux meter: Used to measure light intensity in an area.

These are only some examples of basic measuring and testing equipment.

Testing and measuring equipment both assess the characteristics and performance of devices, systems, or processes; however, there are some subtle distinctions between the two evaluation methods.

Measuring Equipment:
Measuring equipment measures physical quantities such as voltage, current, temperature, or pressure. Measuring devices typically generate numerical readings representing the magnitude of what is being measured.
On the other hand, testing equipment is used to assess the performance or behavior of devices or systems under specific conditions.

Testing Equipment:
Testing equipment may be employed to ascertain whether particular standards or specifications have been met by an object being tested, diagnose any existing faults in their design or validate its design validation process.

Measuring equipment can often be used as part of the testing process; the primary difference between measuring equipment and testing equipment lies in its intended purpose. Measuring equipment can quantify physical quantities, while testing equipment is used to assess performance or behavior issues of devices or systems.

Here are 5 standard pieces of measuring equipment:

Oscilloscope
Digital Multimeter
Analog to Digital (A/D) Converter
Optical Return Loss Meter
LCR Meter

Common types of test equipment:

Electrical Test Equipment
Environmental Test Equipment
Mechanical Test Equipment
Chemical Test Equipment
Optical Test Equipment
Radiological Test Equipment

Here are 5 reasons automatic test equipment (ATE) is useful.

Efficiency: Automation Testing Equipment (ATE) allows for the automation of testing procedures, reducing manual testing requirements while increasing the speed of the process and saving both time and increasing efficiency in manufacturing or production environments.

Accuracy: Automated Test Equipment (ATE) can perform highly precise measurements, detecting faults that would otherwise remain undetected through manual testing methods, which helps improve product quality while decreasing defects or failure risks.

Reproducibility: Automated Test Equipment (ATE) ensures testing is performed consistently and reliably, which can be challenging with manual methods. This helps ensure products meet required specifications and standards.

Cost-Effectiveness: Although initial costs associated with ATE may seem high, its long-term efficiency and accuracy make it cost-effective over time. By replacing human labor with automated testing equipment and decreasing product failure risks or recall risks, ATE can significantly reduce labor expenses while saving significant sums of money in product recall and failure costs - leading to substantial cost savings and financial resiliency.

Flexibility: ATE is designed to perform various tests and measurements, making it a reliable tool for testing multiple products or components.

Overall, automated testing equipment (ATE) can improve testing processes' efficiency, accuracy, and reproducibility while being cost-effective and versatile.

Test and measurement equipment has become more valuable than ever due to several factors:

Complexity: As technology gets more complex, the need for accurate testing and measuring equipment increases. This is especially true in industries like electronics and aerospace where minor mistakes can have serious repercussions.

Quality Control is essential in many industries such as manufacturing to meet the specifications and standards of customers. The testing and measurement equipment is crucial in detecting defects or discrepancies.

Safety: The healthcare and transportation industries place a high priority on ensuring that their employees, systems, and equipment comply with safety standards and operate as intended. This minimizes accidents and injuries. In this effort, testing and measurement equipment is crucial.

Test and Measurement Equipment can improve manufacturing and production efficiency through automation of testing procedures.

Testing and measurement equipment is essential for demonstrating compliance with regulations in many industries.