PTC Instruments

Manufactures Industrial Test Instruments
Temperature | Hardness | Humidity | Pressure

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.

PTC® Instruments On-Line Store

PTC METROLOGY™ Calibration Lab
We are Accredited by A2LA to ISO/IEC/17025 ANSI/NCSL Z540-1 Certificate number 1896.01

To send your instruments for calibration and/or written certification, please click the following link and fill out the RMA (Return Materials Authorization) form. If you know your customer number, click here for RMA Short Form. PTC Metrology™ has qualified technicians with 25 plus years of experience in hardness (durometers) and temperature calibration.

PTC® Instruments manufactures, calibrates and certifies the following test instruments...

PTC® Durometers
Test the hardness of various plastics & rubber.

Shore Hardness

PTC® Thermometers
A full selection of types and temperature ranges for any application.


MadgeTech® Data Loggers
Recording CO2, humidity, temperature & pressure


PTC® Rockwell Equivalent Steel Hardness Testers and Brinell Scopes
Measures the hardness of metals in the range of 20 to 65 HRC.


PTC® offers a full line of many other industrial test instruments for temperature, humidity, pressure, strain and hardness.

  • Shop Pyrometer Kits
    Temperature measurement of furnaces, kilns, ovens, exhusts, motors, etc.

  • Shop Polariscopes
    For determining strain patterns developed during fabrication & manufacturing of glass.

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

Nasa-Logo ULA Lockheed-logo Boeing-Logo Dupont   3M


Dunns 00-837-4530 | Cage Code 96739 | Phone 310.478.1134

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