A large motorhome with a fenced outdoor patio area, including chairs, a table, and a dog sitting on the grass, during sunset with trees in the background.

Premium Protection for Worry Free Travel

#1 Most Recommended Pet Monitor by Professional Handlers

Temperature inside an RV can quickly rise to levels that can be fatal for pets.

A yellow Labrador puppy and a tabby cat sitting side by side, facing forward.

  • Generators used to provide power for RVs can fail or run out of fuel.

  • Unreliable shore power provided to an RV can often trip breakers and stop A/C.

  • A/C units can have a mechanical failure or be incorrectly set.

  • WiFi based climate monitors can easily lose connection and don't work when power fails!

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Put your mind at ease with MarCELL PRO premium cellular based climate monitoring

An RV positioned outdoors with multiple electronic monitoring devices and screens displaying temperature, humidity, and other environmental data.

  • Instantly receive a phone call or text if temperatures get too warm or power is lost! (Device is checking temps every 6 seconds and immediately makes the call if outside safezones!)

  • ​Completely independent cellular connection means no need for Wifi!

  • Includes battery backup to insure notifications even if power is lost! 

  • Customize 9 different notifications so multiple phones receive alerts!​​

  • Check real-time conditions from any phone if wanting to "check in" on the real-time conditions

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How is MarCELL PRO Different

  • High Accuracy Temperature Probe Included.

  • MarCELL PRO allows for phone call alerts (Essential for getting your attention vs just text or app notification)

  • Manufactured in the USA using premium professional grade components. Need help? Award winning support is all USA based.

  • Lifetime Support and Warranty. We are confident with thousands of units and 10+ years manufacturing MarCELL devices.

    • 30 day no risk trial - we want you to be happy with your purchase or happy to take it back all on us!

    • Lifetime warranty - We manufacture with premium components in USA and stand behind our product. We will always make sure you are able to use your device!

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Infographic for MarCELL PRO device highlighting four advantages: 1. High accuracy temperature probe, 2. Allows for phone call alerts, 3. USA manufactured and supported, 4. Lifetime warranty; with visuals of the device, a phone alert, a map of the USA, and a shield badge.

Super Easy Set up:

​Be up and running in a few minutes.  ​No need to contact a cellular provider - we handle all that and unit is fully operational when it arrives to you!

Customize your own safe ranges.  Be notified instantly if climate goes outside these ranges!

Smartphone screen displaying safe range settings for temperature and humidity with adjustable maximum and minimum values.

Add notifications  (including phone call alerts!)

Mobile phone screen displaying an app called MarCell PRO for adding notifications, with fields for alarm type, notification type, message, and phone number.

Check conditions in real-time from anywhere with any phone!

Smartphone screen displaying RV monitoring app with temperature 67°F, humidity 64%, power ON, and last read date and time.

View historical trends to verify if temps are staying steady

MarCELL PRO - Mobile phone screen displaying a weather monitoring app with date, time, temperature, humidity, and power data graphs.