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RHTemp101A Data Logger

State-of-the-art Humidity and Temperature Data Logger

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Rent this Product Specifications Sheet  |  Product Information Card

The RHTemp101A is one of MadgeTech’s series of low cost, state-of-the-art data loggers. MadgeTech has taken the lead in offering the most advanced, low cost, battery powered data loggers in the world today.

The RHTemp101A offers a 10 year battery life, a 1 second reading rate, a multiple start/stop function, ultra-high speed download capability, 500,000 readings per channel storage capacity, optional memory wrap, battery life indicator, optional password protection, programmable high-low humidity alarms and more. The RHTemp101A is priced at $149 each and can be delivered from stock now. Our research has shown that the RHTemp101A is second to no other data logger when it comes to price and performance.

Using the MadgeTech Software, starting, stopping and downloading from the RHTemp101A is simple and easy. Graphical, tabular and summary data is provided for analysis and data can be viewed in °C, °F, K,°R, %RH, mg/ml water vapor concentration and dew point. The data can also be automatically exported to Excel® for further calculations.

As the leader in low power data logger technology, MadgeTech continuously improves its products and develops solutions to meet ever-changing challenges. The RHTemp101A was designed with our customers in mind. MadgeTech offers free firmware upgrades for the life of the product so that data loggers already deployed in the field can grow with the technology. Units do not need to be returned to the factory for upgrades. The user can do this automatically from any PC.

  Required Interface     Calibration Services     Extended Warranty


Temperature Sensor Precision RTD Element
Temperature Range -40 °C to +80 °C (-40 °F to +176 °F)
Temperature Resolution 0.01 °C (0.018 °F)
Temperature Calibrated Accuracy ±0.5 °C (±0.9 °F)


Humidity Sensor Internal semiconductor
Humidity Range 0 %RH to 95 %RH
Humidity Resolution 0.1 %RH
Humidity Calibrated Accuracy ±3.0 %RH (±2 %RH typical at 25 °C/77 °F)
RH Units %RH, dew pt., water vapor, concentration (mg/hl)


Memory 1,000,000 readings per channel; software configurable memory wrap
500,000 readings in multiple start/stop mode
Reading Rate 1 reading every second up to 1 reading every 24 hours
Alarm Yes, Humidity
Baud Rate 115,200
LED Indicators Red & Green
Push-Button Start Yes
Battery Life 10 years typical at a 15 minute reading rate
Material ABS plastic
Dimensions 1.4 in x 2.2 in x 0.6 in (36 mm x 56 mm x 16 mm)
Operating Environment -40 °C to +80 °C (-40 °F to +176 °F), 0 %RH to 95 %RH non-condensing
Required Interface Package IFC200
Approvals CE
Weight  LBS

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4 Item(s)

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  1. Very easy to use Review by Boris

    I have been very pleased with this logger. (Posted on 2/7/13)

  2. RHTemp101A Data Logger Review by Ashley Stokes

    Thanks for the opportunity to review this product. The reliability and accuracy is terrific. The only problem is that it isn't very tough or water resistant. I might have to change products because of this, but I really do like this data logger. (Posted on 12/27/12)

  3. Super easy and totally convenient - just bought a 2nd one Review by Michael Helmbrecht

    The RHT101A data logger is really easy to use, sensitive, and basically fits all my needs. I liked it enough that I recently bought a second one. (Posted on 10/31/12)

  4. Works Great Review by Tim Craig

    This temperature and humidity logger works great and seems very sensitive. I've had it recording for around 3 weeks now with no problems. (Posted on 8/2/12)

4 Item(s)

per page