# Meter

> One installation of a totalizer (hidrômetro) in the well (installation pattern). Holds device facts only: every register value, including the installation and removal readings, lives in production. Since v2.3.

> **Meter** = `object`

One installation of a totalizer (hidrômetro) in the well (installation
pattern). Holds device facts only: every register value, including the
installation and removal readings, lives in `production`. Since v2.3.

## Properties

### attachments?

> `optional` **attachments?**: [`Attachment`](/core/api/type-aliases/Attachment)[]

Installation photos, invoices, certificates.

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### id

> **id**: `string`

Unique within `meters`. UUID v4 recommended.

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### installed\_at

> **installed\_at**: `string`

RFC 3339 instant when the meter entered service in this well.

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### installed\_by?

> `optional` **installed\_by?**: `string`

Person or company that installed the meter.

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### manufacturer?

> `optional` **manufacturer?**: `string`

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### max\_reading?

> `optional` **max\_reading?**: `number`

Register capacity in m³, used to detect rollover.

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### model?

> `optional` **model?**: `string`

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### nominal\_diameter?

> `optional` **nominal\_diameter?**: `number`

Nominal diameter (DN) in millimeters.

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### notes?

> `optional` **notes?**: `string`

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### removed\_at?

> `optional` **removed\_at?**: `string`

RFC 3339 instant when it left. Absent means currently installed.

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### removed\_by?

> `optional` **removed\_by?**: `string`

Person or company that removed the meter. Only meaningful with `removed_at`.

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### serial?

> `optional` **serial?**: `string`

Serial number. Links reinstallations of the same unit.

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### type?

> `optional` **type?**: [`OpenVocab`](/core/api/type-aliases/OpenVocab)\<[`MeterType`](/core/api/type-aliases/MeterType)\>

Meter type. Recommended values: [METER\_TYPES](/core/api/variables/METER_TYPES).

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### updated\_at?

> `optional` **updated\_at?**: `string`

RFC 3339 instant of the last edit of this record.