---
type: Sensor Reference
title: "SNMP Sensors & OID Catalog: Every Metric You Can Monitor"
description: "The reference catalog of SNMP sensors and OIDs — system, network, physical and device metrics organised by MIB, each linking to its how-to twin."
resource: "https://snmp-monitoring.info/sensors/"
tags: [sensors]
timestamp: 2026-07-11T00:00:00Z
---

# SNMP Sensors & OID Catalog: Every Metric You Can Monitor

The reference catalog of SNMP sensors and OIDs — system, network, physical and device metrics organised by MIB, each linking to its how-to twin.

## Related concepts

- Up: [SNMP Monitoring Explained — Protocol, Sensors & Tools](/index.md)
- [Complete SNMP OID Catalog: Every Sensor & Metric](/sensors/all/index.md)
- [SNMP CPU OIDs: hrProcessorLoad & Load Average Reference](/sensors/cpu/index.md)
- [Custom SNMP OIDs: extend, pass & AgentX (How-To)](/sensors/custom-oid/index.md)
- [SNMP Disk / Storage OIDs: hrStorageTable Reference](/sensors/disk/index.md)
- [SNMP Fan Speed (RPM) OIDs: ENTITY-SENSOR Reference](/sensors/fan-speed/index.md)
- [SNMP Humidity & Airflow OIDs (ENTITY-SENSOR Reference)](/sensors/humidity-airflow/index.md)
- [SNMP Interface OIDs: IF-MIB ifTable & ifXTable Reference](/sensors/interface/index.md)
- [SNMP Memory & Swap OIDs: hrStorage & UCD Reference](/sensors/memory/index.md)
- [SNMP Optical / dBm OIDs: SFP DOM Monitoring Reference](/sensors/optical-dbm/index.md)
- [SNMP PDU OIDs: Per-Outlet Current, Power & Energy](/sensors/pdu/index.md)
- [SNMP Voltage, Current & Power OIDs (ENTITY-SENSOR)](/sensors/power/index.md)
- [SNMP Printer OIDs: Toner, Page Count & Status Reference](/sensors/printer/index.md)
- [SNMP Process OIDs: hrSWRunTable & hrSystemProcesses Reference](/sensors/processes/index.md)
- [SNMP RAID OIDs: MegaRAID, PERC & Smart Array Reference](/sensors/raid/index.md)
- [SNMP Active Sessions OID: hrSystemNumUsers Reference](/sensors/ssh-sessions/index.md)
- [SNMP Load Average OIDs: UCD laLoad Reference](/sensors/system-load/index.md)
- [SNMP TCP / UDP / IP OIDs: Stack Counter Reference](/sensors/tcp-udp-ip/index.md)
- [SNMP Temperature OIDs: ENTITY-SENSOR-MIB Reference](/sensors/temperature/index.md)
- [SNMP UPS OIDs: UPS-MIB Battery, Input & Output Reference](/sensors/ups/index.md)
- [SNMP Uptime OID: sysUpTime vs hrSystemUptime Reference](/sensors/uptime/index.md)

## Frequently asked questions

### What can SNMP monitor?

Almost any numeric or state value a device exposes: CPU, memory, disk, network interfaces, temperature, fans, voltage, power, UPS battery, printer toner, RAID health, and more. Standard metrics live in standard MIBs under 1.3.6.1.2.1; vendor-specific ones live in enterprise MIBs under 1.3.6.1.4.1. If a device publishes it as an object, you can poll it.

### Where do I find an SNMP OID?

Start with the complete OID catalog here, which maps common metrics to their OIDs. For anything not listed, walk the relevant MIB on the device with snmpwalk and resolve names with a MIB browser, or consult the vendor's MIB file for enterprise objects.

### What MIB has which sensor?

System metrics are in HOST-RESOURCES-MIB (1.3.6.1.2.1.25); interfaces in the IF-MIB (1.3.6.1.2.1.2 and .31); generic physical sensors in ENTITY-SENSOR-MIB (1.3.6.1.2.1.99); UPS in UPS-MIB (1.3.6.1.2.1.33); printers in Printer-MIB (1.3.6.1.2.1.43). Vendor extras sit under 1.3.6.1.4.1.

### What's the difference between standard and vendor OIDs?

Standard OIDs under 1.3.6.1.2.1 are defined by public MIBs and behave the same across vendors. Vendor (enterprise) OIDs under 1.3.6.1.4.1 are a manufacturer's private space for objects the standards don't cover — you need that vendor's MIB to interpret them.

## Source

Concept generated from https://snmp-monitoring.info/sensors/ — the SNMP Monitoring vendor-neutral knowledge base. Content is limited to what that page states (no external claims added here).