Thermocouple-converter NPM

Thermocouple.js

A JavaScript module for thermocouple voltage to temperature conversions. Based on the Python script I wrote of the same function.

Uses polynomial functions with NIST thermocouple tables and coefficients.

Supports thermocouples of types B, E, J, K, N, R, S, T
All voltage is measured in millivolts (mV)
All temperature measurements are in degrees Celcius

No warranty given or implied whatsoever with this tool. Use at your own risk.

Installation

With NodeJS (production)

Create sample.js:

// Convert type K 4 mv to degc
var Thermocouple = require('thermocouple-converter');
var result = Thermocouple.convert(4.0, { type: 'k', input: 'mv' });
console.log(result);

Install package with npm (remove --production to install devDependencies):

npm install thermocouple-converter --production

Run command to give result of 97.64 degrees:

$ node sample.js
97.64306383175676

Conversion function format

Thermocouple.convert(INPUT_VAL, { type: TYPE, input: TC_TYPE });

Parameters:

INPUT_VAL - input value to be converted
TYPE - single alpha character denoting thermocouple type
TC_TYPE - mv or degc designating INPUT_VAL's units. Determines conversion direction.

If no parameters are supplied, k (Type K) and mv is used as default. This results in Type K millivolts conversion to degrees Celcius.

Examples

Convert 4.0 millivolts from type K thermocouple to temperature.

var result = Thermocouple.convert(4.0, { type: 'k', input: 'mv' });

Convert 100.0 degrees C to type K thermocouple millivolts.

var result = Thermocouple.convert(100.0, { type: 'k', input: 'degc' });

Usage on a web site

Load script with <script> tag:

<script src="Thermocouple.js"></script>

Execute custom conversion as normal JS, for example, insert this inside your <body>:

<div id="result"></div>
<script>
    var result = Thermocouple.convert(4.0, { type: 'k', input: 'mv' });
    document.querySelector('#result').innerHTML = result;
</script>

For a working example, view the static HTML page in test/test.html or live at https://andygock.github.io/thermocouple-converter/

Development

Download source

git clone https://github.com/andygock/thermocouple-converter
cd thermocouple-converter

Install dependencies

npm install

Run unit tests

npm test

thermocouple converter

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