Wireless CommunicationMadgeTech Cloud ReadyBattery Life Indicator

The ThermAlert-RH is a precision, wireless humidity and temperature data logger. Includes ISO17025 accredited calibration certificate. Read More >

Key Features:

  • Precision RTD Sensing Element
  • Configurable Notifications & Alarms
  • Measures Temperatures from -20 °C to 80 °C

Availability: 5-7 Business Days


Extended Warranty


The ThermAlert-RH is a precision, wireless humidity and temperature monitoring and alarming system.

The ThermAlert-RH is capable of measuring and recording temperatures from -20 °C to +80 °C (-4 °F to +176 °F) and humidity from 0 %RH to 95 %RH. This device provides real-time notifications and user-programmable alarms that alert users via email or text when thresholds are breached, allowing users to take immediate action.

The ThermAlert-RH is compatible with the latest MadgeTech 4 Software making starting, stopping, and downloading simple and easy. Graphical, tabular, and summary data is provided for analysis and can be viewed as customizable engineering units.

The ThermAlert-RH is also MadgeTech Cloud Services ready, providing users the ability to monitor data remotely on any smartphone, tablet or internet enabled device.

Note: RFC wireless interface required.
Please see data sheet for a list of countries approved for use, purchase and distribution.


Memory16,128 readings (all channels enabled)
Reading Rate1 reading every 2 seconds up to 1 reading every 24 hours
Battery Life2 years Typical
MaterialABS Plastic
Dimensions2.2 in x 5.25 in x 1.3 in (55 mm x 133 mm x 33 mm)
IP RatingIP20
Operating Environment-20 °C to +80 °C (-4 °F to 176 °F), 0 %RH to 95 %RH non-condensing
Required Interface PackageRFC1000
ApprovalsUS (FCC), CA (IC), CE


Temperature SensorSemiconductor
Temperature Range-20 °C to +80 °C (-4 °F to +176 °F)
Temperature Resolution0.01 °C (0.018 °F)
Temperature Calibrated Accuracy±0.5 °C (0 °C to +50 °C)


Humidity SensorSemiconductor
Humidity Range0 %RH to 95 %RH non-condensing
Humidity Resolution0.1 %RH
Humidity Calibrated Accuracy±3.0 %RH (±2 %RH typical at 25 °C / 77 °F)


RF Carrier Frequency2.45 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 sightUp to 2000 ft
Typical Indoors line of sightUp to 500 ft


ThermAlert-RH Data Sheet

ThermAlert-RH Product User Guide


Part Numbers

ThermAlert-RH — 901718-00