Get a list of Instrument objects. Instruments have a 1:1 mapping with Observations.

### Available end points:

- `/instruments/` - Will list all Instruments in the database
- `/instruments.json` - Will return all Instruments in json format
- `/instruments/<object_id>/` - Returns Instruments object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `title`
- `uuid`
- `keywords`
- `instrumentType`

### How to use filters:

- `/instruments/?title__startwith!=Instrument.title: DETAILS NEEDED`
- `/instruments/?uuid=c7fa005e2095425392b18adbd7b40617`
- `/instruments.json?instrumentType=radiometer`

GET /api/v2/instruments/41869/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 41869,
    "uuid": "7b2d137c4b1945f5a955478bdea2e102",
    "title": "NCAS Reduction Gas Analyser unit 1 instrument",
    "abstract": "NCAS Reduction Gas Analyser unit 1.\nManufacturer:  Trace Analytical\nModel Number: RGA3\nSerial number: nan\nData Products available for this instrument: co-h2-concentration|h2-concentration\n\nThis instrument is hosted by the University of East Anglia for the National Centre of Atmospheric Science (NCAS).",
    "keywords": "",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/13021/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/13111/?format=api"
    ],
    "instrumentType": "UNDEFINED",
    "subInstrument": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/203708/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/203709/?format=api"
    ]
}