Manufacturer profile

About Guildline

Reviewed 2026-07-26

Guildline Instruments Limited is a Canadian designer and manufacturer of primary-level electrical and temperature metrology equipment. Its instruments and standards are intended for national metrology institutes, calibration laboratories, research organizations, and other users that require traceability and very low measurement uncertainty.

History

Guildline states that it has designed and manufactured metrology-based electrical instruments and standards since 1957. The company describes its equipment as primary standards and measurement systems used for research, calibration, manufacturing support, and establishing traceability to fundamental electrical standards. That focus distinguishes Guildline from general industrial instrument suppliers.

Its portfolio spans quantum Hall systems, resistance and thermometry bridges, high-resistance meters and bridges, precision current sources and shunts, voltage dividers and references, resistance standards, power analyzers, transconductance amplifiers, temperature baths, and automated measurement systems. Guildline also makes salinometers, extending its precision-measurement work into oceanography.

The current company contact page identifies Guildline Instruments Limited's headquarters at 21 Gilroy Street in Smiths Falls, Ontario, Canada. Guildline continues to market instruments for primary electrical metrology and temperature measurement, including resistance bridges, resistance standards, current standards, and complete measurement systems. This draft leaves ownership blank because the official pages reviewed do not state a parent or independent ownership status.

Equipment specialties

  • Primary electrical metrology
  • Resistance and thermometry bridges
  • Resistance, current, and voltage standards
  • High-resistance and high-current measurement
  • Temperature metrology systems
  • Salinity measurement

Sources

Models

3210 Series 1 document
Datasheet
5010 1 document
Datasheet
50103 1 document
Datasheet
5030 Series 1 document
Datasheet
5150 1 document
Datasheet
5600 Series 1 document
Datasheet
6500A 1 document
Datasheet
6520 2 documents
User ManualDatasheet
6530 1 document
Programmers Manual
6530 Series 1 document
Datasheet
6535 1 document
Brochure
6564 1 document
Datasheet
66001 1 document
Datasheet
6622A Series 1 document
Brochure
6622A-XPS 1 document
Datasheet
6622T Series 1 document
Datasheet
6623A Series 1 document
Brochure
6623A-PCS 1 document
Datasheet
6624CT-3000 1 document
Datasheet
66252 DMM Switch 1 document
Brochure
6625A 2 documents
Brochure
6625A-QHR 1 document
Datasheet
6625T Series 1 document
Brochure
6634A Series 1 document
Datasheet
6634TS 1 document
Datasheet
6636 Series 1 document
Datasheet
6640T 1 document
Brochure
6664B 1 document
Datasheet
6664C 1 document
Datasheet
6675A 2 documents
Datasheet
7223CT-2S 1 document
Datasheet
7320 Series 1 document
Datasheet
7330 Series 1 document
Datasheet
7334 Series 1 document
Datasheet
7340 Series 1 document
Datasheet
7350 Series 1 document
Datasheet
7410 1 document
Datasheet
7620 1 document
Datasheet
8400B 1 document
Datasheet
8410A Portasal 1 document
Datasheet
8820A MiniBAT 1 document
Datasheet
9200 1 document
Datasheet
9211A 1 document
Datasheet
9211B 1 document
Datasheet
9230A 1 document
Datasheet
9230A Series 2 documents
Datasheet
9330 Series 1 document
Datasheet
9334A 1 document
Datasheet
9334A Series 2 documents
Datasheet
9336 & 9337 Series Precision High Value Air Resistance Standards 2 documents
Datasheet
9340 1 document
Datasheet
9340 Series 1 document
Datasheet
9340-4T Series 1 document
Datasheet
9350 Series 1 document
Datasheet
9540 Digital Thermometer 3 documents
DatasheetUser ManualService Manual
9540/B 1 document
Service Manual
9730CR 1 document
Datasheet
9730CR4 1 document
Datasheet
9732VT 1 document
Datasheet
99100A 1 document
Datasheet
9910A 1 document
Datasheet
9923 1 document
Performance Verification
9975 1 document
Service Manual
AR100 1 document
User Manual
CD Series 1 document
Datasheet
Guildline 6500 1 document
Calibration Manual
LD Series 1 document
Datasheet
LionMount KF Series 1 document
Datasheet
Model 6500 1 document
Service Manual
Model 6520 1 document
Datasheet
Model 6623 1 document
Datasheet
Model 6664C 1 document
Datasheet
Model 9975 Thermometer Bridge 1 document
Instruction Manual Addendum
RD Series 1 document
Datasheet
SR1050 Series 1 document
Datasheet