Retherm - RTD & Thermocouples APK

Retherm – RTD & Thermocouples

Overview

• Retherm is a user-friendly and lightweight application designed to assist engineers, technicians, and students in converting electrical resistance or voltage readings from temperature sensors into accurate temperature values.

• It is primarily intended as a quick reference tool for laboratory, industrial, or educational use.

• The program supports a wide range of sensor types and provides flexible options for displaying results in either Celsius or Fahrenheit.

RTD Conversion Features

• Retherm accurately converts resistance values obtained from RTD (Resistance Temperature Detector) sensors into temperature readings.

• Supported RTD sensor types include Pt100, Pt500, and Pt1000, which are among the most commonly used in various measurement systems.

• The conversions are performed using the standardized equations defined by the European/DIN standard, covering a wide temperature range from -200°C to +850°C.

• The average margin of error for standard calculations is approximately ±0.02°C, ensuring high precision for most practical applications.

• For users who require compatibility with the American standard, the application includes an additional option that allows calculations within the range of 0°C to 100°C, with a typical error margin of about ±0.2°C.

Thermocouple Conversion Features

• Retherm can also convert thermocouple voltage readings directly into temperature values.

• Calculations are based on a 0°C reference junction temperature and utilize the internationally recognized NIST (National Institute of Standards and Technology) polynomial coefficients for accuracy.

• Supported thermocouple types include B, E, J, K, N, R, S, and T, covering most industrial and laboratory measurement needs.

• Results can be displayed in either degrees Celsius or degrees Fahrenheit, depending on user preference.

Additional Information

• The application includes direct links to authoritative websites that provide further information about RTD sensor standards and principles of temperature measurement.

• Retherm is designed for quick reference and convenience; however, users should note that minor errors may occur despite efforts to ensure data accuracy.

• The developer disclaims liability for any issues arising from the use of the application.

• Feedback, error reports, or suggestions are welcome through the “contact developer” option on the app’s page or the “email developer” link in the extras menu.

• Retherm is an open-source project released under the MIT License and can be accessed at: https://codeberg.org/danb/retherm

FAQ

Q: Who can benefit from using Retherm?

A: Retherm is ideal for users who frequently work with temperature measurements, such as instrumentation engineers, calibration technicians, researchers, and students studying thermometry or sensor systems. It simplifies the process of converting raw sensor readings into reliable temperature data.

Q: What types of sensors does Retherm support?

A: The application supports two main categories of temperature sensors—RTDs (Resistance Temperature Detectors) and thermocouples. Within these categories, it accommodates a wide range of sensor types, including the popular Pt100, Pt500, and Pt1000 RTDs, as well as thermocouple types B, E, J, K, N, R, S, and T.

Q: How does Retherm perform RTD conversions?

A: Retherm uses standardized equations defined by the European/DIN standard to convert resistance values into temperature readings. This ensures that the results align with internationally recognized reference tables and formulas, producing accurate measurements across a wide temperature range.

Version History

v2.0.3——20 Oct 2025

Retherm converts RTD and thermocouples sensors to temperature. Download the latest version of Retherm - RTD & Thermocouples to enjoy new features and updates immediately!

*2.0.3

• Updated layout to avoid overlapping with system bars.

• Updated styles to use light status bar to avoid issue with invisible status bar text.

*2.0.2

• Added metadata for F-Droid.

• Adjusted build data for reproducible builds.