IP/Web Temp Sensors and Loggers With
Alerts via Internet, Email or Phone

USB dongle that automatically monitors and sends triggered and scheduled ambient temperatures
Temperature@lert USB Standard 3.5

This compact thermal sensor/logger/emailer doesn't need batteries or a power supply as it gets it power from a computer via USB.

One look at this gadget and it's obvious that its most natural habitat is a server rack, being an uncomplicated, compact and low-cost solution that offloads many functions onto software running on a PC, server or laptop. The included Windows software is quite comprehensive (the manufacturer also supplies Linux software on request).

In classic set-it-and-forget-it fashion, the software can send an email alert (and also shut down the system after a customizable delay if you like) when temperatures fall outside a user-defined low or high (-40°C to 93°C, 0.5°C accuracy). Data is logged to text and XML files, and if you're running a web server this means that you can view real-time readings over the internet.

Browse the latest remote temperature sensors here
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Computer-free operation that only needs access to a power socket and an ethernet or wi-fi router WiFi Edition

In contrast to the USB dongle on the left, this networked wireless temperature recorder/transmitter doesn't need a computer to operate - just a power supply and access to a standard ethernet or 802.11 wifi router. If you have PoE, the ethernet cable is all you need. From there on, everything is automated - from continuously logging data to text and XML files to sending email alerts if it gets too hot or cold.

Since no computer is needed, this is a much more scalable solution if you need to monitor several different areas with multiple devices (e.g. one for inside your house and one for your shed freezer). Ease of expandability also applies to the unit itself, and you can purchase sensor extension cables, an extra sensor, an add-on water-proof thermometer (perfect for an indoor swimming pool) or an add-on humidity-sensing probe.

Browse the latest remote temperature sensors here
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Transmits directly to (subscription) cellular network with phone, text and email alerts; contains battery
Cellular Edition

Ideal for isolated or inaccessible locations, the cellular version of TemperatureAlert uses a connection to the cellular network to wirelessly transmit measurements to your online account. No computer, router or phone line needed - just a power source. Even in the event of a power outage, the built-in back-up battery allows it to run for four weeks without power.

Thanks to the cellular connection, you can be notified of alerts not only by email but also by a text message or a telephone call. In addition to all the features found in the WiFi version, you also get an iPhone app, out-of-the-box ability to view data online, the ability to set multiple alarm zones and notifications in case of power or device failure. You can also install a vehicle power adapter or a solar panel as well as all of the addon's that the WiFi version supports.

The downside of this device is its high(er) upfront cost plus the ongoing cost of the (required) Temperature@lert cellular-based service subscription (you can't use a different carrier) and this costs anywhere from $15-$99 per month depending on things like monitoring frequency, length of log storage, frequency of alarms, security settings and other features.

Browse the latest remote temperature sensors here
(Non-U.S. visitors click here for international shipping at Amazon.com))

Check out the videos below for situations that could have benefited from the above products.

Noisy Broken Air Conditioner | Mess From a Broken Freezer | Interview and Photos of Burst Pipe Damage