Welcome to PTC® Instruments & PTC Metrology™

PTC® Instruments, a division of Pacific Transducer Corp is the leading manufacturer of Durometers and Surface Thermometers in the world. Our factory and calibration lab is located in Los Angeles, California where PTC® has been manufacturing quality test instruments since 1946.
Accredited to ISO 17025

PTC® Instruments manufactures, calibrates and certifies the following test instruments...
  • Durometers-for testing the hardness of various plastics & rubber.
  • Steel Hardness Testers-measures the hardness of metals in the range of 20 to 65 HRC.
  • Surface Thermometers-designed for applications such as: hot plates, griddles, die-cast dies, foundry core boxes, annealing ovens, weld preheats, motors, generators, engines, bearings, boilers, tanks, pipes, etc.
  • Recording Thermometers-permanently records temperature versus time with both accuracy and reliability.
  • Pyrometer Kits-temperature measurement of furnaces, kilns, ovens, platens, rollers, weld preheats, exhusts, motors, etc.
  • Polariscopes-for determining strain patterns developed during fabrication and manufacturing of glass.
  • Brinell Microscopes-a hand held portable reader and compatible with all Brinell type machines.
PTC® Instruments also offers a full line of Pressure Gauges, Data Loggers and many other industrial test instruments for temperature, humidity, pressure, strain and hardness.
306L Durometer Type A
PTC® Durometers and Durometer Test Stands Made in the U.S.A.

PTC® manufactures, repairs and calibrates durometers to ASTM D2240 F1957, ISO, JIS, and DIN standards since 1946. Test Stands, Test Blocks, material testing, calibration, repair and certification services.

Technical Data Durometers Durometer Types and Specifications

PTC Metrology™ has manufactured and continues to calibrate durometers for...

Nasa Logo Orion Logo Spacex Logo Orion Logo

PTC® Thermometers Made in the U.S.A.

PTC® manufactures, repairs and calibrates thermometers and data loggers for surface temperature and humidity measurement.

The best bimetal surface thermometer on the market for over sixty years. PTC®'s surface thermometers are unrivaled for their combination of accuracy, quality, versatility, and economy. Manufactured from the finest materials, these instruments will continue to give accurate readings for many years. Each thermometer is individually calibrated and serialized. Our thermometers have an accuracy of ±2% of full scale range and are backed by a one year warranty.

Certification service using NIST traceable standards and in accordance with ANSI/NCSL Z540-1 is available for all of these units. Accredited by A2LA to ISO/IEC17025 and ANSI/NCSL Z540-1. NIST Traceable Temperature Calibration for Surface, Immersion, RTD's, Probes, Thermocouples, Data Loggers, and Infrared Black Body.

Hi Temp Data Logger
PTC® Data Loggers Made in the U.S.A.

PTC® Instruments offers data loggers to record the temperatures for perishable goods in transit, HACCP Compliance, HVAC, medical, pharmaceutical, sterilization, environmental research, perishable goods, food storage monitoring, warehouse monitoring , environmental studies, wine cellars, humidors, refrigeration, archival storage for fine art and books etc.

PTC® has data loggers for recording temperature, humidity, pressure, shock, voltage and pH. Our data loggers interface with personal computers and laptops and are operated world wide using Windows based software designed to activate the logger and to view and analyze the collected data. For technical assistance please contact us at: Accredited by A2LA to ISO/IEC17025 and ANSI/NCSL Z540-1. NIST Traceable Temperature Calibration for Surface, Immersion, RTD's, Probes, Thermocouples, Data Loggers, and Infrared Black Body.

PTC Metrology™ Calibration Lab

Our calibration lab provides temperature calibration and certification services for Thermometers, Surface, Air, Immersion and Digital, Liquid-in-Glass, Infrared, PRT's, Thermistors, Thermocouples, and Stem Thermometers. Many quality assurance systems require that calibrated or certified thermometers be used where accurate measurements are of importance.

PTC® has calibrated thermometers for over 60 years and is now accredited by A2LA to ISO/IEC 17025 and ANSI/NCSL, Z540-1. Please download our scope of accreditation from A2LA.

PTC Metrology™ is Accredited by A2LA to ISO/IEC 17025 and ANSI/NCSL Z540-1 and offers NIST Traceable calibration and certification services for durometers, temperature, humidity and pressure. For complete information, please visit

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