# Fetch gas data

Get gases measurements for the selected instruments and time range.

Optionally choose what period to recalculate results to.

The maximum date range per request is 31 days. If you request a longer range, the server will respond with an error.
The default Period is 1 minute.
The period can be set to anything between 1 minute and 1 day. If you request a period outside this range, the server will respond with an error.

Requires an API key with the data.enviro:read scope.

Endpoint: GET /data/gases
Version: 1.0.1
Security: apikey

## Query parameters:

  - `instruments` (array, required)
    Serial numbers of selected instruments
    Example: ["QT123456","QT234567"]

  - `start` (string, required)
    Start date and time for loading a range of data. Must be in UTC.

This uses the ISO8601 format. For example, 2023-01-01T00:00:00Z is 1st January 2023 at midnight UTC.
    Example: "2023-01-01T00:00:00Z"

  - `end` (string, required)
    End date and time for loading a range of data. Must be in UTC.

This uses the ISO8601 format. For example, 2023-01-01T00:00:00Z is 1st January 2023 at midnight UTC.
    Example: "2023-01-31T00:00:00Z"

  - `period` (string)
    Period to recalculate data samples to.

This cannot be less than the recorded data period.

This uses the ISO8601 duration format. For example, P1D is 1 day, PT1H is 1 hour, PT1M is 1 minute.
    Example: "PT1H"

## Response 200 fields (application/json):

  - `startTime` (string)
    Time of the sample

  - `duration` (integer)
    Duration of the sample in seconds

  - `instrument` (string)
    Instrument serial number

  - `co` (number,null)
    Carbon monoxide in parts per billion

  - `cO2` (number,null)
    Carbon dioxide in parts per million

  - `h2S` (number,null)
    Hydrogen sulphide in parts per billion

  - `no` (number,null)
    Nitric oxide in parts per billion

  - `nO2` (number,null)
    Nitrogen dioxide in parts per billion

  - `o3` (number,null)
    Ozone in parts per billion

  - `sO2` (number,null)
    Sulphur dioxide in parts per billion

  - `voc` (number,null)
    Volatile organic compounds in parts per billion

## Response 401 fields (application/json):

  - `error` (string)
    Error code

  - `description` (string)
    Description of the error

## Response 403 fields (application/json):

  - `error` (string)
    Error code

  - `description` (string)
    Description of the error

## Response 429 fields (application/json):

  - `error` (string)
    Error code

  - `description` (string)
    Description of the error