Room Alert 4E Monitor


The Room Alert 4E/4ER is AVTECH’s economical environment monitor for more modest spaces. It monitors temperature, plus up to 3 more environment conditions of your choice. It additionally features a dedicated port for direct connection of AVTECH’s Relay Switch or Light Tower.

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 4E 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 4ER.

Room Alert 4E standard package $ 395.00

Order before 3pm EST for same day shipping!

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Room Alert 4E/4ER Description

AVTECH’s Room Alert 4E/4ER is an economical environment monitor that meets more focused needs. It monitors your facility for temperature and up to 3 more environment conditions of your choice. Our standard package includes 1 external Digital Temperature Sensor.

Want to respond to alert conditions by turning electrical devices on and off? This model additionally features a dedicated custom port for AVTECH’s Relay Switch or Light Tower w/ Audio. No adapter is needed, which is easier on your budget!

The 4ER version has a removable rack mount and fits 1U of space in a server cabinet; the 4E version can hang from a ceiling or on a wall from its wall mount. One unit covers smaller spaces by itself; multiple can canvas larger areas. This unit is at home in small computer rooms and large data centers, modest storage spaces and sprawling warehouses alike!

Use Room Alert 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 4E/4ER with included 5V power adapter.

PoE is not available on this model.

Room Alert 4E/4ER Specifications



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

2 digital sensor ports (RJ-11)
1 switch sensor port (push-button terminal block)
1 Light Tower/Relay port (custom)

Power & connectivity ports

1 5V barrel-connector power jack
1 RJ-45 Ethernet port
For data only. No PoE.

Power supply

AVTECH 5V power adapter (100/240 VAC, 50/60 Hz, RoHS)
PoE is not available on this model.


4.56" 4E version (no rack mount)


0.54 lbs 4E version (no 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 4E/4ER Compatible Products

Compatible monitoring platforms

You may access your Room Alert 4E/4ER 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

Compatible sensors & accessories

Compatible sensors & accessories
Matching ports on this model

Any AVTECH digital sensor


2 digital ports

Any AVTECH switch sensor

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


1 switch port

Any AVTECH analog sensor

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


Add up to 2 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


Add 4 relay output ports.

Here's how: Put a Relay Switch in your device's dedicated Light Tower/Relay Switch port.

Built in

1 dedicated port (no adapter required)

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 4ER Standard Package

The Room Alert 4ER comes rack-mounted and fits 1U of a server rack.

Don't need the rack mount? Consider the Room Alert 4E.

Package contents


Room Alert 4E environment monitor

+ AVTECH 5V power adapter

+ Ethernet cable (10')

+ Wall mount (attachable)

$ 395.00

External Digital Temperature Sensor

with built-in 25' RJ-11 cable

free! $ 45.00

Room Alert Account special upgrade offers

free! $ 60.00 to $ 99.95

Your cost

$ 395.00

Shipping weight

2.06 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 4E/4ER Support & Documentation

New to Room Alert 4E/4ER?

Get to know our economical model!

Video introduction to Room Alert 4E/4ER

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

Room Alert 4E/4ER product tour

Next stop, Room Alert 4E/4ER! Explore its 4 ports while you’re there.

Room Alert 4E 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 Room Alert 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 4E/4ER?

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 4E/4ER 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.