MarCell M2 Cellular Power Failure and Temperature Alarm

Save $4.01
MarcellSKU: M2-ATT

Carrier: AT&T
$194.99 $199


MarCell M2 Cellular Temperature and Power Alarm Monitoring with Email/Text/Phone Alerts

No telephone line or Internet needed at the monitored location.

Protect pets against dangerous high or low freezing temperatures.

Protect your property from damage caused by burst pipes from freezing temperatures, failed equipment or power failures.

The MarCell M2 is a cellular connected monitoring device that monitors for low or high temperatures, freezing, humidity and power failures. The MarCell M2 is perfect for monitoring homes, condos, cottages, RVs, mobile homes, remote properties, AirBNB rentals or businesses.

When power fails or the temperature or humidity rises or falls outside your set range, you will receive an email, SMS text message or phone call right away!

In addition to reporting in case of a problem, the cellular temperature freeze and power alarm logs hourly data to the cloud service. Use the web interface to check status, program the alarm points, add or remove alert users and contacts. Communication is via the AT&T or Verizon cellular network and can be sent to any device that can receive an SMS text message or email or voice phone call. Be sure to choose the correct carrier when checking out.

In case of a power failure, the on board rechargeable battery keeps it working for 24-48 hours so alerts can still be sent.

To provide further protection from costly water damage due to floods or leaky appliances, add a wireless water sensor:

Please note: MarCell requires a subscription service. Plans can be stopped and started as needed.

This affordable service offers the following plans:

$8.25 per month (annual plan 12 months)

$11.95 per month (seasonal plan 4-8 months)

$14.95 per month (monthly plan)

MarCell M2 Features

  • No Phone Line or Internet required at monitored location
  • Monitor for hi and low temperature and freezing
  • Monitor for power failures
  • Monitor for hi and low humidity
  • Will send alerts via text, email, and telephone calls.
  • Uses Verizon or AT&T network to connect to the cloud service independent of your current phone carrier


How often does Marcell report in with temperature and humidity data?

Current temperature and humidity is checked against your settings every 10 seconds. If the current readings are outside of your safe range, an alert will be sent immediately. If readings are within your safe range, they are recorded every hour locally and uploaded every 8 hours to the cloud service for historical logging. At that point, this data is displayed on the web site in graph or chart form.

In case of an alarm condition, the alert is sent right away!

A subscription is required to monitor the property and receive alarm notifications. Service subscriptions are available on a month-to-month, seasonal or annual basis via starting at USD$8.25/mo.

How does the cellular billing work?

The beauty of the Marcell M2 is that you can turn the cellular connection on and off as needed so you are only paying when you need it. You can do this online at any time - quickly, easily and with no hassle. There are no set up, activation or disconnection fees. Marcell uses the Verizon or AT&T network and requires a decent cellular signal at the installation location. Works in continental USA only.

Also known as Homesitter part# HS-500SL - Replaces MarCell AT&T, MAR500, MAR501

MarCell Cellular Freeze and Power Failure Alarm Specifications

  • Power: 110VAC to 5VDC, 2A plug-in power adapter with built-in rechargeable battery backup
  • Temperature Alarm Range: 20 to 120F (-7 to 49C)
  • Humidity Alarm Range: 10 to 90% RH
  • Operating Temperature Limits: 20 to 158F (-7 to 70C)
  • Includes plug-in power supply and internal Lithium Ion rechargeable battery

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