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/223/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 223,
    "uuid": "fcbdb31c451e49509ab6c438ac139098",
    "title": "Manchester/UFAM: Differential Mobility Particle Sizer - formerly umist-dmps",
    "abstract": "A Differential Mobility Particle Sizer (DMPS) operated by the University of Manchester which measures aerosol size distribution.  The DMPS classifies particles according to electrical mobility in a differential mobility analyser and counts particles of given mobility using a condensation particle counter. The Manchester DMPS uses two such DMA’s and CPC of different specifications to measure aerosol size distributions from 3.5 – 800nm, with a complete scan taking ten minutes.",
    "keywords": "",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/169/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/170/?format=api"
    ],
    "instrumentType": "instrument",
    "subInstrument": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/595/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/594/?format=api",
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/204723/?format=api"
    ]
}