Temperature Calibration

PTC Metrology™ provides temperature calibration and certification services for...

  • Surface Thermometers
  • Air Immersion and Digital
  • Liquid-in-Glass
  • Infrared
  • PRT's
  • Thermistors
  • Thermocouples
  • Stem Thermometers
Many quality assurance systems require that calibrated and certified thermometers be used where accurate measurements are of importance. PTC® has calibrated thermometers for over 70 years and is now accredited by A2LA to ISO/IEC 17025 and ANSI/NCSL, Z540-1. Please download our scope of our accreditation from A2LA.
Surface Thermometer Certifications

Several levels of calibration services available from PTC Metrology™ to conform to your quality system requirements. PTC® recommends 3 point calibration as a minimum on surface thermometers.
Temperature Measuring Devices w/ Readout

Digital Thermometers with probes or thermocouples, Stems Thermometers , Readouts with Sensors, Data Loggers with Sensors or LCD's

Sensors, PRT's, RTD's, Thermistors, Thermocouples & Probes
Liquid in Glass Thermometers

Including ASTM Liquid In Glass Thermometers
Infrared Thermometers, Black Body

Infrared temperature calibration from 20°C to 1000°C Black Body up to 1200°C
Air Immersion Certification

Environmental Thermometers, Data Loggers and Recording Thermometers (without probes) PTC Models 616, 618, 815 and 818 series.
Tech Note on ASTM Thermometers

PTC Metrology™ will examine and calibrate your ASTM Thermometer against NIST traceable standards at temperature points specified by ASTM E1 Table 1. The thermometers will be calibrated at the specified temperature in accordance with Test Method E-77. PTC is accredited by A2LA to ISO/IEC 17025 and ANSI/NCSL Z540-1. Please contact PTC® for pricing.

Selecting Temperature Points

To assist you in choosing test points, please refer to ASTM E-77 and NIST recommendations.

1. A minimum of three temperatures should be calibrated, generally low, medium and high on the scale.

2. There should be no more than 100 graduations between any two calibration temperatures. If a thermometer is calibrated every 100 divisions, the user may interpolate intermediary corrections with a precision of ± 1/2° scale division (ASTME-77) .

3. If the temperatures used by the manufacturer for scale placement are known, the temperatures used for calibration should correspond. This will assure linearity of spacing between the calibrated points, therefore allowing the user to interpolate intermediate values.
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