# Thermocouple.js
A JavaScript module for thermocouple voltage to temperature conversions. Based on the [Python script](https://github.com/andygock/Thermocouple) I wrote of the same function.
Uses polynomial functions with [NIST thermocouple tables and coefficients](http://srdata.nist.gov/its90/main/).
- 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`:
```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);
```
[pnpm](https://pnpm.io/) was used here but instructions here are given for the more common npm package manager.
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
```js
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.
```js
var result = Thermocouple.convert(4.0, { type: 'k', input: 'mv' });
```
Convert `100.0` degrees C to type K thermocouple millivolts.
```js
var result = Thermocouple.convert(100.0, { type: 'k', input: 'degc' });
```
## Usage on a web site
Load script with `
```
Execute custom conversion as normal JS, for example, insert this inside your ``:
```html
```
For a working example, view the static HTML page in `test/test.html` or live at
## Development
Download source
git clone https://github.com/andygock/thermocouple-converter
cd thermocouple-converter
Install dependencies
npm install
Run unit tests
npm test