Room Alert 12S Monitor


The Room Alert 12S is AVTECH's mid-range environment monitor in our Room Alert PRO line, offering the highest security features such as HTTPS, TLS and SNMP v3.

Like our Room Alert 12E, this model monitors temperature plus up to 8 more environment conditions of your choice including an analog (0-5VDC) input. It also offers an additional dedicated relay port to toggle low-voltage electrical devices.

When conditions exceed your thresholds, Room Alert notifies you right away so you can act quickly.

  • Send email and text messages right from the device.
  • Trigger the warning LEDs and siren sound on a Light Tower.
  • Pair with (or other compatible platforms) for even more alerting capabilities.

The Room Alert 12S can sit on a table or attach to a wall or ceiling with its included wall mount. Need your device rack mounted for your server rack? Consider the Room Alert 12SR.

Room Alert 12S standard package $ 725.00

Order before 3pm EST for same day shipping!

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Room Alert 12S Description

As part of our Room Alert PRO line, the Room Alert 12S features these secure protocols:

  • View the built-in web interface over HTTP or HTTPS.
  • Push data to your account over HTTPS.
  • Send alert notifications from the device over your TLS mail server.
  • Integrate the device into your preferred SNMP program over SNMP v3. (SNMP v1 traps and SNMP v2c also available)
  • Update your firmware with your authenticated username & password.

AVTECH’s Room Alert 12S/12SR has the features of our flagship Room Alert 32S model on a smaller scale and a lower price. It securely monitors your facility for temperature and has a capacity for up to 8 more sensors. Our standard package includes 1 external Digital Temperature & Humidity Sensor (25') to help monitor temperature, humidity, heat index and dew point.

Additional dedicated ports allow you to toggle electrical devices, such as AC units, fans, alarm panels and the warning LEDs/siren sound on a Light Tower.

The 12SR version has a removable rack mount and fits 1U of space in a server cabinet; the 12S version can hang from a ceiling or on a wall from its wall mount. Meant for mid-sized spaces requiring thorough and secure coverage, this unit is at home in server rooms, warehouses and any space requiring eyes on a several different conditions — or on the same condition in several targeted locations.

Use Room Alert 12S on its own or pair it with these powerful platforms!

  • Room Alert Manager
  • 3rd-party SNMP or JSON

Trigger alerts, reminders and “all-clears” in response to environmental thresholds that you set.

Receive alerts in the best format for you!

  • Email
  • Text message
  • Visual/audible signal
  • HTTP post
  • SNMP trap

View sensor readings on an easy-to-read web interface—over the Internet or on your local network.

Compile, graph and download historical sensor data to spot trends in your environment.

Power Room Alert by PoE or with included 5V power adapter.

Room Alert 12S/12SR Specifications

This list applies to both the Room Alert 12S and Room Alert 12E models.



Internal temperature sensor

Condition monitored
Indoor ambient temperature
-40 to 185 F (-40 to 85 C)
+/- 2° C
0.03125° C
Numeric values in Fahrenheit or Celsius

External sensor & accessory ports

3 digital sensor ports (RJ-11)
4 switch sensor ports (screw terminal blocks)
1 analog sensor port (screw terminal blocks)
1 relay output port (screw terminal blocks)
1 Light Tower & Relay Adapter port (RJ-11)

Power & connectivity ports

1 5V barrel-connector power jack
1 RJ-45 Ethernet port (PoE-enabled)

Power supply

AVTECH 5V power adapter (100/240 VAC, 50/60 Hz, RoHS)
or PoE (IEEE802.3af compliant)


4.5" 12S version (no rack mount)
19" 12SR version (rack mounted)


1.6 lbs (with rack mount)

Operating tolerances

-40 to 185 F (-40 to 85 C)
5% - 85% RH, non-condensing
Do not place Room Alert monitors inside refrigerators/freezers—these are condensing environments.

Room Alert 12S/12SR Compatible Products

Compatible monitoring platforms

You may access your Room Alert 12S through the compatible platforms below. For more information, please see our FAQ, The Differences Between Room Alert Monitoring Platforms.

Room Alert's built-in web interface Account

Room Alert Link software

Room Alert Manager software

Replaces Device ManageR.

Device ManageR software

Device Discovery utility

3rd-party off-the-shelf SNMP program

3rd-party custom HTTP/JSON application

Room Alert "S" models are not compatible with AVTECH's Device ManageR software or Device Discovery utility.

Compatible sensors & accessories

This list also applies to the Room Alert 12E model.

Compatible sensors & accessories
Matching ports on this model

Any AVTECH digital sensor


3 digital ports

Any AVTECH switch sensor

Any 3rd-party device with open/closed dry contacts


4 switch ports

Any AVTECH analog sensor

Any 3rd-party analog sensor that outputs 1 to 5 VDC


1 analog port


Add up to 3 more analog ports.

Here's how: Put a Digital Temperature & Analog Sensor in each of your device's built-in digital ports

3rd-party low-voltage electrical devices


1 relay output port


Add 1 more relay output port.

Here's how: Put a Light Tower & Relay Adapter in your device's built-in LTA port.

Then add up to 4 more relay output ports.

Here's how: Put a Relay Switch in the Light Tower & Relay Adapter.


Add 1 compatible port.

Here's how: Put a Light Tower & Relay Adapter in your device's built-in LTA port.

Compatible power adapters

Always use an AVTECH 5V power adapter with your Room Alert. Others will void your warranty and may damage your unit.

Room Alert 12S Standard Package

The Room Alert 12S can sit on a table or attach to a wall or ceiling with its included wall mount.

Need your device rack mounted for your server rack? Consider the Room Alert 12SR.

Package contents


Room Alert 12S environment monitor

+ AVTECH 5V power adapter

+ Ethernet cable (10')

+ Wall mount (attachable)

$ 725.00

Digital Temperature & Humidity (25')

free! $ 95.00

Room Alert Account special upgrade offers

free! $ 60.00 to $ 199.95

Your cost

$ 725.00

Shipping weight

2.19 lbs Shipping calculated at checkout

Room Alert Account

A Room Alert Account at the Base level is free for all Room Alert customers and never expires.

Special Room Alert Account Upgrade Offers

Log in to your Room Alert Account or contact your Product Specialist for details.

AVTECH reserves the right to change special offers at any time.

Room Alert 12S Support & Documentation

New to Room Alert 12S?

Get to know our PRO models!

Video introduction to Room Alert 12S

Start here for a brief overview of this model’s features.

Room Alert 12S product tour

Next stop, Room Alert 12S! With a mix of sensor options, there’s plenty to explore.

Room Alert 12S planning worksheet

You’re ready for your next adventure—add external sensors for the conditions most important to you.

Not sure which model is right for you?

Video overview of Room Alert

Get a quick peek at our 5 models—there’s one that’s right for you.

Room Alert product tours

Take in more of the local scenery—we’ve got tours for each Room Alert.

Room Alert model comparison

Do a deeper dive into each Room Alert’s features & benefits.

Need more assistance before you purchase?

Request a quote online or contact our experienced Product Specialists for a free consultation!

Already have Room Alert 12S?

Know your stuff

User's guide & reference manual

Learn how to navigate and configure your Room Alert’s built-in web interface.

Room Alert FAQs

More questions? Our extensive collection of easy-to-read answers is sure to help.

Limited hardware warranty terms & conditions

tl;dr? In short:

  • Room Alert monitors are covered for 1 year after purchase.
  • External sensors & accessories are covered for 90 days after purchase.

Treat it right

Firmware downloads

Keep your unit’s firmware up-to-date. You’ll have the latest features & fixes for the best experience.

How to update firmware on Room Alert monitors

Refer to this FAQ for step-by-step instructions.

Room Alert 12S firmware release notes

Want to know what’s new? Look here.

Need more assistance in setting up or using your products?

Visit our online support center or contact our expert Technical Support Specialists

Room Alert is Made in the USA, ships the same day, and has been protecting facilities in over 185 countries since 1988.