# getPumpInstalledAt

> Returns the pump installed in the well at instant: the entry with installedat <= instant and no removedat or removedat > instant (latest installed if several overlap). Use it to link a record dated in the past (e.g. a water sample collected at the pump) to the pump in place then.

> **getPumpInstalledAt**(`well`, `instant`): `PumpInstallation` \| `undefined`

Returns the pump installed in the well at `instant`: the entry with
`installed_at <= instant` and no `removed_at` or `removed_at > instant`
(latest installed if several overlap). Use it to link a record dated in the
past (e.g. a water sample collected at the pump) to the pump in place then.

## Parameters

### well

`Well`

The well.

### instant

`string` \| `Date`

RFC 3339 instant (or a `Date`).

## Returns

`PumpInstallation` \| `undefined`

The installation in place at `instant`, or `undefined`.