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HOBO® Temp/RH 3.5% Data Logger (UX100-003) Manual 

The HOBO Temp/RH data logger records temperature and relative humidity (within 3.5% 
accuracy) in indoor environments with its integrated sensors. Using HOBOware®, you can easily 
configure the logger alarm to trip for specific high or low sensor readings. Or, you can set up burst 
logging in which the logger records data at a different interval during certain conditions. The 
logger can also calculate minimum, maximum, average, and standard deviation statistics. This 
compact data logger has a built-in LCD screen to monitor the current temperature, relative 
humidity, logging status, battery use, and memory consumption in between readouts.  

Specifications 

Temperature Sensor 

 

Range 

-20° to 70°C (-4° to 158°F) 

Accuracy 

±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F), see Plot A 

Resolution 

0.024°C at 25°C (0.04°F at 77°F), see Plot A 

Response Time 

4 minutes in air moving 1 m/s (2.2 mph) 

Drift 

<0.1°C (0.18°F) per year 

RH Sensor 

 

Range 

15% to 95% (non-condensing) 

Accuracy 

±3.5% from 25% to 85% including hysteresis at 25°C (77°F); below 
25% and above 85% ±5% typical 

Resolution 

0.07% at 25°C (77°F) and 30% RH 

Response Time 

43 seconds to 90% in airflow of 1 m/s (2.2 mph) 

Drift 

<1% per year typical 

Logger 

 

Logger Operating Range 

Logging: -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing) 
Launch/Readout: 0° to 50°C (32° to 122°F) per USB specification 

Logging Rate 

1 second to 18 hours, 12 minutes, 15 seconds 

Logging Modes 

Fixed interval (normal), burst, or statistics 

Memory Modes 

Wrap when full or stop when full 

Start Modes 

Immediate, push button, date & time, or next interval 

Stop Modes 

When memory full, push button, or date & time 

Restart Mode 

Push button 

Time Accuracy 

±1 minute per month at 25°C (77°F), see Plot B 

Power Source 

One 3V CR2032 lithium battery and USB cable 

Battery Life 

1 year, typical with logging rate of 1 minute and sampling interval of 
15 seconds or greater 

Memory 

128 KB (84,650 measurements, maximum) 

Download Type 

USB 2.0 interface 

Full Memory Download Time 

20 seconds 

LCD 

LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly 
or go blank in temperatures outside this range 

Size 

3.66 x 8.48 x 1.52 cm (1.44 x 3.34 x 0.6 in.) 

Weight 

30 g (1.06 oz) 

Environmental Rating 

IP50 

 

The CE Marking identifies this product as complying with all relevant 
directives in the European Union (EU). 

 

HOBO Temp/RH 3.5% 
Data Logger 

UX100-003 

Included Items: 

 

Command™ strip 

 

Double-sided tape 

 

Hook & loop strap 

Required Items: 

 

HOBOware 3.4 or later 
(download at 
www.onsetcomp.com/ 
hoboware-free-download) 

 

USB cable 

 

 

 

 

 

 

Office: Jl. Radin Inten II No. 62 Duren Sawit, Jakarta 13440 - Indonesia
Workshop: Jl. Pahlawan Revolusi No. 22B, Jakarta 13430 - Indonesia
Phone: 021-8690 6777 (Hunting)

Fax: 021-8690 6777

Mobile: +62 816 1740 8925

Fax: 021-8690 6771

Summary of Contents for Hobo UX100-003

Page 1: ...0 to 95 RH non condensing Launch Readout 0 to 50 C 32 to 122 F per USB specification Logging Rate 1 second to 18 hours 12 minutes 15 seconds Logging Modes Fixed interval normal burst or statistics Mem...

Page 2: ...logger is equipped with an LCD screen that displays details about the current status This example shows all symbols illuminated on the LCD screen followed by definitions of each symbol in the table b...

Page 3: ...Select Turn LCD off when setting up the logger as described in the next section When this option is enabled you can still temporarily view the LCD screen by pushing the Start Stop button for 1 second...

Page 4: ...and restart the logger with the Start Stop button 9 Choose whether to keep the LCD on or off By default the LCD will always remain on while logging If you select the Turn LCD off checkbox the LCD wil...

Page 5: ...ecord data every 10 seconds until the temperature falls back below the high limit or 85 F in this case At that time logging then resumes every 5 minutes at the normal logging interval Similarly if the...

Page 6: ...H data logged every 5 minutes plus eight maximum minimum average and standard deviation series four for temperature and four for RH with values calculated and logged every 5 minutes based on the 30 se...

Page 7: ...et HUM UPS 500 To replace the sensor 1 Use a screwdriver to pop out the louvered door in the logger case 2 Use needle nose pliers to remove the RH sensor from the board inside the logger case and disc...

Page 8: ...fire Do not expose the contents of the battery to water Dispose of the battery according to local regulations for lithium batteries HOBOware provides the option of recording the current battery volta...

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