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This section provides an overview for functional testers as well as their applications and principles. Also, please take a look at the list of 7 functional tester manufacturers and their company rankings. Here are the top-ranked functional tester companies as of June, 2025: 1.GÖPEL electronic GmbH., 2.Egro Burge Co., Ltd., 3.Seica SPA.
Table of Contents
A function tester is a device used to verify the functionality of electronic boards, ensuring they operate as intended. It is critical in electronic control systems across various devices, where the first step towards guaranteeing safe and correct operation is to inspect the electronic board for defects.
Inspection methods include AOI (automated optical inspection), ICT (in-circuit testing), and FCT (functional circuit testing), with AOI focusing on visual checks for wiring and component integration defects.
Function testers assess if an electronic board functions correctly by simulating operational conditions and checking for the correct output signals and component operations. Given the unique functionality required by each board, selecting an appropriate tester is crucial. Applications range from testing power supply boards for correct voltage and current output to evaluating LED lighting efficiency in response to input current.
Function testers work by supplying power and input signals to the board, and then measuring output signals and component behavior against expected outcomes. This process often involves using test patterns generated by FPGAs to stimulate microcontrollers and ICs on the board. Before testing, a visual inspection is recommended to identify any potential defects that could lead to board damage during testing.
Unlike ICT, which focuses on the electrical characteristics of individual components, function testing evaluates the board's overall operational capability.
In-circuit testing primarily checks for correct component placement and soldering, not evaluating functional performance or internal connections like BGAs. Function testers, however, are designed to identify functional failures, with many models incorporating ICT capabilities for comprehensive evaluation.
Functional tests may include assessments of current and voltage in output circuits, LED operation, microcontroller functionality via FPGA-generated patterns, and connector integrity. With the increasing complexity of electronic circuitry in devices like smartphones and automotive controls, custom testing solutions, including peripheral circuits and electromagnetic shielding, are often required.
*Including some distributors, etc.
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Keysight Technologies, Inc. was founded in 1939 and headquartered in Santa Rosa, California. Keysight is a global developer and manufacturer of electronic design and test solutions to communications, networking, aerospace, defense, and government, automotive, energy, semiconductor, electronic, and education industries. Keysight’s communications solutions group solutions include electronic design automation software; radio frequency and microwave test solutions, hardware and virtual network test platforms and software applications, as well as optical laser source solutions. Keysight’s electronic industrial solutions group offers various design tools and verification tools. Keysight offers product support, technical support, and training and consulting services. It sells its products through direct sales force, distributors, resellers, and manufacturer's representatives.
Seica S.p.A., founded in 1986 and based in Strambino, Italy, is a manufacturer of test equipment, inspection, and selective soldering systems. Its products include in-circuit testers, laser selective soldering systems, and flying probe testers, and it serves three main groups of customers, including industrial electronics manufacturing, mil-aero, and printed circuit board manufacturing. It has offices in countries like the USA, China, and Germany. All the company’s products are based on its software and hardware platform, VIVA Integrated Platform. If required, the company’s systems can also be controlled by alternative software packages such as LabWindowsTM/CVI, LabviewTM, and TestStandTM.
GOEPEL electronic, established in 1991 in Jena, Germany, operates as a manufacturer and supplier of test and inspection solutions for electronic and mechanical components. Its offerings encompass boundary scan test systems, automotive test systems, embedded JTAG solutions, optical inspection systems, and X-ray inspection systems. These tools are pivotal in fault detection, diagnosing issues, verifying functionality, and upholding quality standards across applications like printed circuit boards, automotive electronics, industrial automation, and aerospace. The company has been certified according to DIN EN ISO 9001 by TÜV Rheinland since 1996.
VTI INSTRUMENTS, founded in 1990 and located in San Diego, California, is a manufacturer and supplier of precision modular instrumentation systems, programmable power supplies, and precision data acquisition instruments for electronic signal distribution, monitoring, and acquisition. The company produces electronic loads, AC and DC programmable power supplies, application-specific power subsystems, and compliance test components. The products have applications in semiconductor fabrication, oil exploration, solar arrays, defense ATE, and battery string simulation.
InterWorking Labs, established in 1993 and based in Scotts Valley, California, is a software developer and supplier of network emulators and protocol testers. The company's product portfolio includes Virtual Maxwell Pro, Virtual KMAX, and Simple Network Management Protocol (SNMP). These products are used in various sectors, including information technology (IT), education, and telecommunications. The company offers services including technical support, product customization, and training to help customers understand how to use its software. Some of its partners include Gambit Communications, SNMP Research International, Inc., and Tail-f Systems.
Ranking as of June 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | GÖPEL electronic GmbH. |
26.8%
|
| 2 | Keysight Technologies |
16.1%
|
| 3 | Egro Burge Co., Ltd. |
16.1%
|
| 4 | Seica SPA |
14.3%
|
| 5 | InterWorking Labs |
12.5%
|
| 6 | VTI INSTRUMENTS |
10.7%
|
| 7 | Okano Electric Co., Ltd. |
3.6%
|
Derivation Method
The ranking is calculated based on the click share within the functional tester page as of June 2025. 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 (%) |
|---|---|---|
|
Japan
|
2 | 66.7% |
|
United States of America
|
1 | 33.3% |
49 products found
49 products
Shin -Electronic Co., Ltd.
400+ people viewing
Last viewed: 21 hours ago
In today's automobiles, most controls are performed on electronic boards, and it is said that there are hundreds of such electronic substrates in t...
Kyoritsu Test System Co., Ltd.
480+ people viewing
Last viewed: 1 day ago
■Summary ・Since it is a general-purpose function test system, model changes can be made by simply changing the test fixture and inspection program...
Shin -Electronic Co., Ltd.
360+ people viewing
Last viewed: 11 hours ago
It is our own test machine that combines function testa and image inspection. The liquid crystal and segments are displayed in the function tester,...
Newly Tsuchiyama Co., Ltd.
420+ people viewing
Last viewed: 3 hours ago
■Detect manufacturing defects of mounted boards using high-speed in-circuit system ・Capacitor: 10 times faster, resistor: 2 times faster (compared...
Kyoritsu Test System Co., Ltd.
460+ people viewing
■Multiple inspections with one tester ・In-circuit test (ICT) + Function test (FCT) ・In-circuit test (FCT) + flash ROM writing (on-board programmi...
Kyoritsu Test System Co., Ltd.
480+ people viewing
Last viewed: 46 minutes ago
■Summary -Each FX function module is a dedicated module with a unified 5-inch bay size. ・Each module is operated using a personal computer with a ...
Kyoritsu Test System Co., Ltd.
300+ people viewing
Last viewed: 45 minutes ago
■Summary -Each FX function module is a dedicated module with a unified 5-inch bay size. ・Each module is operated using a personal computer with a ...
Kyoritsu Test System Co., Ltd.
450+ people viewing
Last viewed: 1 day ago
■Product overview ・No need for air compressor ・Electric press that can be used only with commercial power supply ■Excellent positioning accuracy...
PERITEC INC.
230+ people viewing
Last viewed: 12 hours ago
・Compact, high performance, low price ・High reliability - Abundant customization ・Menu selection test program - Abundant software drivers ・Hand...
PERITEC INC.
260+ people viewing
Last viewed: 8 hours ago
Case study ■ECU board production inspection equipment The EV ECU board inspection jig is equipped with two ECU jigs, and automatically switches bet...
Nidek Advanced Technology Co., Ltd.
200+ people viewing
Last viewed: 6 hours ago
High-speed OPEN/LEAK tester compatible with IC multi-function testing In addition to high-speed continuity and short-circuit measurements, 4-termi...
CPI Ltd.
220+ people viewing
Last viewed: 1 day ago
Eureka DDR4 2933 is a DDR4 DIMM/SODIMM function tester for memory distributors and module manufacturers, including DDR4 RDIMM (x4, x8), UDIMM (ECC/...
CPI Ltd.
190+ people viewing
Last viewed: 1 day ago
Eureka DDR3 1866 is a DDR3 DIMM/SODIMM function tester for memory distributors and module manufacturers that can test DDR3 RDIMMs, UDIMMs, SODIMMs,...
CPI Ltd.
190+ people viewing
Last viewed: 18 hours ago
SP3000 is a high-performance memory tester that can test various DIMMs and memory chips by replacing the test adapter equipped with DIMM/SODIMM or ...
Excel Co., Ltd.
170+ people viewing
Last viewed: 3 hours ago
SOLARI-Ve is an IV curve tracer compatible with 1,500V and a measuring instrument that can evaluate power conditioners during actual operation. ov...
Okano Electric Co., Ltd.
210+ people viewing
Last viewed: 6 hours ago
■Summary ・Function tester with automatic display inspection function using CCD camera ・Can identify various display patterns of LCD/LED ・Compati...
Newly Tsuchiyama Co., Ltd.
230+ people viewing
Last viewed: 12 hours ago
■Introduction method ・Inspections that were previously performed manually can be automated, contributing to labor savings. ・Inspection results re...
