Manufacturer profile

About GW Instek

Reviewed 2026-07-26

GW Instek is the test-and-measurement brand of Good Will Instrument Co., Ltd., a Taiwan-based manufacturer founded in 1975. The company makes bench and laboratory instruments spanning oscilloscopes, spectrum analyzers, signal sources, programmable power supplies, electronic loads, digital multimeters, LCR meters, and electrical-safety test equipment.

History

Good Will Instrument's official corporate history says the company was founded in 1975 as Taiwan's first professional manufacturer specializing in electrical test and measurement instruments. It began with power supplies and then expanded into higher-precision electronic instrumentation. The company's milestone record identifies early products including the GDM-8035 digital multimeter, an oscilloscope introduced in 1980, and a power-supply line introduced in 1981, showing the early mix of general measurement and controlled-power equipment represented in its manuals.

The company later broadened its international and product footprint. Its published milestones include the establishment of Instek America in 1991, ISO 9002 certification in 1993, and a Taiwan Stock Exchange listing in 2000. The current official overview describes more than 300 products and organizes the measurement range around oscilloscopes, spectrum analyzers, signal sources, AC and DC power supplies, DC electronic loads, digital multimeters, LCR meters, and safety testers. This draft uses GW Instek as the catalog-facing identity while retaining Good Will Instrument as the legal name.

Equipment specialties

  • oscilloscopes
  • spectrum analyzers
  • signal generators and sources
  • AC and DC power supplies and electronic loads
  • digital multimeters and LCR meters
  • electrical safety testers

Sources

Models

3000 Series 1 document
Quick Reference
303DDMD1 1 document
User Manual
AFG-2000 Series 1 document
Service Manual
APS-1102A 2 documents
DatasheetUser Manual
GCT-9040 1 document
User Manual
GDS-1000 Series Digital Storage Oscilloscope 2 documents
User Manual
GDS-1000-U Series 2 documents
User Manual
GDS-1000A-U Series Digital Storage Oscilloscope 2 documents
Programmers ManualUser Manual
GFG-3015 1 document
User Manual
GFG-8015G 1 document
Service Manual
GOM-801H 1 document
User Manual
GOM-802 2 documents
User Manual
GOS-653G 1 document
Datasheet
GOS-6xxG Family 1 document
User Manual
GPC-3030DQ 1 document
Datasheet
GPD-2303S DC Power Supply 2 documents
DatasheetService Manual
GPD-3303 Series 1 document
User Manual
GPD-4303S 1 document
Datasheet
GPD-X303S Series 1 document
User Manual
GPI-825 2 documents
Datasheet
GPI/GPT-8X5 Withstand Voltage Tester 2 documents
Service Manual
GPM-8212 2 documents
User Manual
GPR-M 1 document
Datasheet
GPR-MIDDLE SERIES 1 document
User Manual
GPS-2303 1 document
Datasheet
GPS-2303/3303 1 document
User Manual
GPS-3030D 1 document
Datasheet
GPT-805/815 Electrical Safety Tester 3 documents
User Manual
GPT-9000 Electrical Safety Tester 2 documents
User Manual
GPT-9000 / GPT-9000A Series 1 document
User Manual
GPT-9000 Series Electrical Safety Tester 2 documents
User Manual
GPT-9600 1 document
Datasheet
GPT-9600 Series 1 document
User Manual
GPT-9900 1 document
Datasheet
GVT-417B 1 document
User Manual
INSULATION RESISTANCE TESTER GPT-9600 Series 1 document
Quick Reference
LCR-6300 1 document
User Manual
LCR-800 Precision LCR Meter 2 documents
User Manual
OPTIONAL ACCESSORIES A35 A36 GOS-600G Series 1 document
User Manual
PEL-3031E 1 document
Datasheet
POWER SUPPLY GPR-U Series 1 document
User Manual
PSM-2010 1 document
Datasheet
PSM-3004/6003/2010 1 document
User Manual
PSP-603 3 documents
User ManualDatasheet
PST-3201 1 document
User Manual
PST-3202 DC Power Supply 2 documents
Datasheet
PSW-360W 1 document
Datasheet
SPS-1230 1 document
Datasheet