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Therm•A•lert-P Data Logger

Precision Wireless Temperature Data Logger with external probe. Includes ISO17025 accredited calibration certificate.

Availability: 5-7 Business Days


The MadgeTech Therm•A•lert-P is a temperature monitoring and alarming system, designed specifically for laboratories, warehouses and other environments where temperature monitoring is critical. The system can be used to monitor a single location, or expanded to monitor hundreds of locations over a broad area (additional MadgeTech wireless loggers and transceivers may be required).

The Therm•A•lert-P provides real time wireless, or wired, notification of temperature. The data logger features user programmable alarms that can be configured to send a message via text message (standard SMS rates apply), on-screen alarm and/or via e-mail if an alarm condition is met. The standard Therm•A•lert-P includes an RTD probe with a 9 ft lead wire and a 4.5 in probe sheath.

The Therm•A•lert-P device is equipped with two-way wireless communication. MadgeTech wireless systems offer a flexible and robust integration for many applications. One PC can provide control and communication to all the wireless loggers within range, or the system can be divided into smaller subnets (using a different RF channel). In addition to the data being transmitted wirelessly, the Therm•A•lert-P also stores each reading to non-volatile internal memory for a secure backup. Customers can set up automatic archiving preferences, ensuring all data is saved and retained to comply with federal regulations.

The Therm•A•lert-P probe can be mounted inside an ethylene glycol bottle. When placed in a chamber, the temperature of the ethylene glycol is measured rather than air temperature. This more accurately represents the temperature of the contents inside the chamber, and prevents false alarm triggers when the chamber door is opened and closed. The glycol bottles are available in 30 ml, 60 ml and 250 ml sizes.

Countries approved for use, purchase and distribution of the Therm•A•lert-P:
Australia, Austria, Belgium, Bulgaria, Canada, Chile, Colombia, Croatia, Cyprus, Czech Republic, Denmark, Ecuador, Estonia, Finland, France, Germany, Greece, Honduras, Hungary, Iceland, Ireland, Israel, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Mexico, New Zealand, Norway, Peru, Poland, Portugal, Romania, Saudi Arabia, Singapore, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Thailand, The Netherlands, Turkey, United Kingdom, United States, Venezuela, Vietnam

The Therm•A•lert-P data logger is cloud ready providing users the ability to monitor data remotely on any smartphone, tablet or internet enabled device. Learn more about MadgeTech Cloud Services.


Remote Channel Temperature Range -200 °C to +260 °C (-328 °F to +500 °F)
Remote Channel Temperature Resolution 0.01 °C (0.018 °F)
Remote Channel Temperature Calibrated Accuracy ±0.1 °C (-20 °C to +80 °C)
±0.5 °C (outside of that range)


RF Carrier Frequency 2.45 GHz IEEE 802.15.4 ultra-low power MadgeNET wireless transceiver with fully bi-directional communication
Output Power +0 dBm typical
Receiver Sensitivity -95 dBm typical (RFC1000)
Typical outdoors Line of sight Up to 2000 ft
Typical Indoors line of sight Up to 500 ft


Memory 30,000 readings
Reading Rate 1 reading every 2 seconds up to 1 reading every 24 hours
Battery Life 2 years Typical
Material ABS Plastic
IP Rating IP20
Operating Environment -20 °C to +80 °C (-4 °F to 176 °F), 0 %RH to 95 %RH non-condensing
Lead Wire: -200 °C to +200 °C (-328 °F to +392 °F)
Required Interface Package RFC1000
Approvals US (FCC), CA (IC), CE
Weight 0.3313 LBS

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  1. Excellent, hard working recording device Review by Katie

    I love this little temp recording device. We use it to record pasteurization temperatures of our milk. We have had this unit for 6 or 7 years now, we use it almost every day and have never changed the battery! It is still at 100% battery level.
    This unit has hit the floor on numerous occasions and has no problem with the humidity in our cheese plant, it just keeps going.
    My only wish for this little device is that it came with a longer probe! If it did, I would own two of them. (Posted on 6/16/15)

  2. Data Loggers Allow for Continuous Monitoring Review by Candy Company

    The current use of the MadgeTech temperature units we use is to maintain temperature on all our incubators, refrigerators, ultra freezers, water baths and hot boxes thus ensuring that the appropriate temperatures are maintain during the testing period of our confectionery products. The systems offer us continuous monitoring and the program ensures that the testing that is done is done in accordance with federal standards. The systems we currently use monitor temperatures from -40 C to 100 C, this variety ensures that all our applications are met. Our previous processes did not allow for continuous monitoring which in today’s food conscious environment is an essential part of consumer food safety. In addition to the above description of the applications the technical support from MadgeTech goes above and beyond other small units we have used in the past. (Posted on 1/6/12)

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