Axiom Temperature Data Analysis

Precision Coefficient Calculation for Accredited Labs.

From raw calibration data to publication-ready coefficiets; Axiom handles RTD, thermistor, thermocouple, and SPRT calculations in one purpose-build application, so you spend less time on spreadsheets and more time on the work that actually needs your expertise.

Axiom Temperature Data Analysis is the first release in the Axiom Suite, built by a working metrologist for labs that can't afford to get coefficient calculation wrong.

Where general-purpose tools force you to build and rebuild fitting routines by hand, Axiom gives you a dedicated workflow: import your calibration data, choose your sensor type and fit model, and generate accurate, traceable coefficients in minutes — including full SPRT calibration and ITS-90 fixed-point realization, a capability most comparable tools don't offer at all.

Screenshot of a software interface displaying ITS-90 deviation fit analysis for SPRTs with temperature data, residuals, rated ranges, and reference table generation options.

SPRT - ITS-90 Fixed Point Analysis

  • Full SPRT calibration workflow built to ITS-90 fixed-point standards

    • Supports ITS-90 ranges from TPAr (-189.3442 °C) to FPAg (961.78 °C)

  • Supports true W calculation, each measurement point requires a resistance at the fixed-point temperature and at the Triple Point of Water.

  • Built by a metrologist with 25 years of experience who works with SPRTs and fixed-points directly

Download the manual here.

Screenshot of Axiom DataAnalysis software interface showing calibration data and fit calculations for temperature resistance analysis, including tables of measured and predicted values and residuals.

Sensor Coefficient Calculation

  • RTD/PRT coefficient calculation using ITS-90, Callendar - Van Dusen, and polynomial fitting methods

  • Thermistor coefficient fitting - Steinhart-Hart and polynomial methods

  • Thermocouple data fitting - deviation from established reference functions and polynomial

    • Currently supports thermocouple types: E, J, K, N, T, B, R and S. More types to follow.

Screenshot of an import preview window showing a table with columns for Temperature, Resistance, and Std.Dev., with data rows and an 'Import' button.

Data Import & Output

  • Import raw calibration data directly via .csv file import or paste from Excel, or enter readings manually

  • Generate temperature vs. resistance, ratio and EMF tables

  • Export coefficients and tables in formats ready for your calibration reports and downstream software.

Built for Accredited Labs

  • Designed around ISO/IEC 17025 workflows

  • Easy installation - trusted Windows publisher

  • Straightforward licensing: try the full interface risk-gree, then unlock complete functionality when you’re ready

Why labs are switching to Axiom

Most coefficient calculation software was built to do one narrow job - and stopped there years ago. Axiom is built differently: as the foundation of a growing platform. Today it’s temperature coefficient and SPRT analysis. Coming next: uncertainty budgeting, full instrument and data management, and calibration automation - all sharing the same Axiom foundation, so the tool you invest in now keeps paying off as your lab’s needs grow.

Axiom is built by Harper Metrology - an independent metrology consultancy with more than 25 years of hands-on calibration, uncertainty analysis, and accrediation experience. This isn’t software built by a generic dev team guessing at what labs need. It’s built by someone who’s done the work.

See it on your own data

Try Axiom Temperature Data Analysis free - explore the full interface and see exactly how it handles your calibration workflow before you commit.

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