RHTemp101A Humidity and Temperature Data Logger

State-of-the-art humidity and temperature data logger used for warehouse, museum monitoring, and HVAC studies

$269.00 CAD
Normally ships in 1-2 Weeks

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This Data Logger Requires IFC200 USB Cable & Software Package.

For many applications that require the monitoring of both ambient temperature and humidity, the RHTemp101A is the ideal solution. Used for warehouse and museum monitoring as well as HVAC studies, the RHTemp101A can measure ambient temperature from -40°C - 80°C and humidity from 0% RH - 95% RH.

This compact device can be placed virtually anywhere to provide an accurate temperature and humidity record of the environment. Use several RHTemp101A’s to capture a thorough mapping of large rooms or facilities.

Using the MadgeTech Software, the device can be configured to record at user selected intervals as frequent as one reading every second to as seldom as one reading every 24 hours. With a 10 year battery life and the ability to store up to 1,000,000 readings per channel, the RHTemp101A is perfect for long term data logging studies.

This affordable, low maintenance device is popular for many applications in the medical & pharmaceutical industry, storage monitoring and general purpose humidity recording.

• 10 year battery life
• 1 s reading rate
• Multiple start/stop function
• Ultra high speed download
• 1,000,000 readings per channel, storage capacity
• Memory wrap
• Precision RTD sensing element
• Battery life indicator
• Optional password protection
• Programmable high and low alarms
• NIST traceable
• Field upgradeable


Temperature Sensor

Precision RTD Element

Temperature Range

-40°C -80°C (-40°F - 176°F)

Temperature Resolution

0.01°C (0.18°F)

Calibrated Accuracy

± 0.5°C (± 0.9°F)


Humidity Sensor

Internal semiconductor

Humidity Range

0% RH - 95% RH

Humidity Resolution

0.1% RH

Calibrated Accuracy

± 3.0% RH

± 2% RH typical @ 25°C (77°F)



1,000,000 readings per channel; software configurable memory wrap

500,000 readings in multiple start/stop mode

Wrap Around


Reading Rate

1 reading every 1 s up to 1 reading every 24 hrs

Baud Rate


Start Modes

Immediate start

Delay start up to 18 months in advance

Multiple pushbutton start/stop

Multiple Start/Stop Mode

Start and stop the device multiple times without having to download data or communicate with a PC

Stop Mode

Manual through software

Timed (specific date and time)

Multiple Start/Stop Mode Activation

To start the device:

Press and hold the pushbutton for 5 s, the green LED will flash during this time.  The device has started logging.


To stop the device:

Press and hold the pushbutton for 5 s, the red LED will flash during this time.  The device has stopped logging.

Real Time Recording

The device may be used with PC to monitor and record data in real time


Programmable high and low limits; alarm is activated when humidity reaches or exceeds set limits

LED Functionality

Green LED blink:

10 s rate to indicate logging

15 s rate to indicate delay start mode


Red LED blink:

10 s rate to indicate low battery and/or full memory

1 s rate to indicate an alarm condition

Password Protection

An optional password may be programmed into the device to restrict access to configuration options.  Data may be read out without the password.


Digital calibration through software

Calibration Date

Automatically recorded within device

Data Format

Date and time stamped °C, °F, K, °R, % RH, mg/mL water vapor concentration, dew point

Time Accuracy

± 1 min/month @ 20°C (68°F); stand alone data logging

Battery Type

3.6 V lithium battery included; user replaceable

Battery Life

10 years typical at a 15 min reading rate

Computer Interface

USB (interface cable required) 115,200 baud


XP SP3/Vista/Windows 7/Windows 8


ABS Plastic


1.4 in x 2.2 in x 0.6 in (36 mm x 56 mm x 16 mm)

Operating Environment

-40°C -80°C (-40°F -176°F), 0% RH - 95% RH, Non-condensing


0.9 oz (24 g)



• Implement HACCP programs
• Warehouse monitoring
• Museum monitoring
• Medical and pharmaceutical
• General purpose humidity recording

IFC200 Data Logger Interface
USB interface cable package for standard series data loggers
Normally ships in 1-2 Weeks
$160.65 CAD
LTC-7PN Lithium Battery
3.6 V, lithium battery, 750 mAH
Normally ships in 1-2 Weeks
$14.00 CAD
MadgeTech 4 Secure Validation Software Package
IQ/OQ/PQ secure software validation workbook and software package
Normally ships in 1-2 Weeks
$1,890.00 CAD