The Cellular Temperature & Humidity Monitor

Be alerted to changes in temperature, moisture, water leaks, and unexpected power outages.

24/7 Uninterrupted Monitoring
Instant Alerts, Custom Notifications
Access Historical Data Anytime
Affordable Plan Options
Proudly Made in America

4.8 out of 5

Monitor What Matters with our Temperature Monitor

RV-Pet Safety

Property

Greenhouses

Farms

Food Safety

Warehouses

Wine Cellars

Server Rooms

MarCELL: The Cellular Advantage

Unlike Wi-Fi devices and unpredictable internet service, MarCELL reports data and sends alerts over the nation’s most reliable cellular networks, even when power and internet go down.

MarCELL will continue to operate during power outages for up to 48 hours on our integrated backup battery.

Use MarCELL anywhere there is a cellular signal. MarCELL performs perfectly even in remote locations where Wi-Fi isn’t available or reliable.

Custom Notifications

Choose multiple people to receive alerts by text, call or email.

Intuitive Dashboard

Set trigger points, view data, and customize your preferences.

Backup Battery

Monitors during power outages for up to 48 hours.

Access Data On-the-Go

Keep tabs on your property at anytime, from anywhere.

Download our mobile app from the App Store or Google Play Store.

Easy Access Dashboard:

Our intuitive online dashboard offers key historical data trends, valuable insights, and controlled oversight of environmental conditions.

Choose your MarCELL:

$223.00

$119.99

$245.00

$209.00

$257.00

$219.00

Enjoy free shipping on every order and start monitoring what matters most.

FAQs

Where will MarCELL work?

Devices connected to the Verizon network can operate in the U.S and Puerto Rico only.

We also offer an AT&T version of MarCELL which operates in the U.S, Canada, and Mexico.

MarCELL does not currently work on the SaskTel network.

Do not attempt to use MarCELL outside of the geographical area it is intended for as the device will not work and additional roaming charges will apply.

Does MarCELL Require A Subscription Plan?

Yes. MarCELL is a cellular connected device using Verizon and AT&T networks. Monthly plans start as low as $8.25/month.View plans here.

Does MarCELL Require My Current Cell Phone Plan To Operate?

No. MarCELL runs on its own independent 4G networks. It does not require Wi-Fi, fixed broadband, or an existing phone line (Ex. if you currently use Sprint, this won’t affect your MarCELL Verizon subscription).

Does MarCELL report data in real-time?

Real-Time Monitoring

MarCELL captures environmental readings every 10 seconds.
If a reading exceeds your set thresholds, you’ll receive an instant notification.

Live Viewing via Web or App

When you log in, readings refresh automatically, then update every 15 minutes while you’re active.
For on-demand updates, you can purchase Instant Update bundles—just $2 for 8 updates—to view the latest data anytime.

Historical Data Recording

MarCELL stores temperature readings every hour (or every 30 minutes on Pro devices).
These readings are uploaded to the server every 8 hours (or every 4 hours for Pro).
Historical records are stored indefinitely and can be downloaded from our servers.

What If I Am Unhappy With My Device?

We’re confident MarCELL will be the perfect solution for your needs! In the case that you are unhappy with the device, you can return it for a full refund within the first 90 days, no questions asked.

What our customers say

With hundreds of properties to monitor, our favorite feature with MarCELL is that it will alert us if any of our homes’ temperatures and humidity reach a low threshold.

The MarCELL has given me 100% peace of mind when it comes to leaving my pups in the RV on a hot day. I don’t have to think about it – it simply alerts me if the temperature has gone over my set limit.

MarCELL has already saved us at our cabin in rural Northern Wisconsin. We are unable to get wireless or landline communications, so MarCELL was a perfect option.