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/20147/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "ob_id": 20147,
    "uuid": "d7714fe160454f91bb2900bcec6aacb8",
    "title": "KCL: ACSM Aerodyne Quadrupole Aerosol Chemical Speciation Monitor (ACSM)",
    "abstract": "The Aerodyne Quadrupole Aerosol Chemical Speciation Monitor\r\n(ACSM) instrument operated by King's College London for the Clearflo project is similar in function to the related Aerosol Mass Spectrometer, but is optimised for long-term monitoring, with a lower specification of mass spectrometer and no sizing capability. Aerosol are drawn into the instrument through an aerodyamic lens and concentrated using differential pumping, before being vaporised at 600 °C on a tungsten surface. The vapors are then analysed using 70 eV electron ionisation, the output is then Aerosol non-refractory mass concentrations and mass spectra  of Nitrate, sulphate, ammonium, particulate organic matter,\r\nparticulate organic source apportionment at a frequency of approx 30 minutes. ",
    "keywords": "acsm aerosol",
    "identifier_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/9018/?format=api"
    ],
    "instrumentType": "mass_spectrometer",
    "subInstrument": [],
    "responsiblepartyinfo_set": [
        "https://api.catalogue.ceda.ac.uk/api/v2/rpis/78328/?format=api"
    ]
}