Hukseflux

Thermal Sensors

LI19Handheld read-out unit / datalogger
LI19 is a high-accuracy handheld read-out unit / datalogger. It is used to make mobile measurements,for short term datalogging (as a static logger), and as an accurate millivolt amplifier directly connected toa PC. LI19 can be used with a variety of sensors. LI19’s most common application is with heat flux- andsolar radiation sensors. LI19 battery life and memory allow continuous measurement for up to 50 days.

Introduction
LI19 is typically used to display the measured solarradiation or heat flux. It measures a DC voltage.
Once programmed with the sensitivity of theconnected sensor, the display will show the actual
value of the heat flux or solar radiation in W/m2.
LI19 is programmed through its PC user interface.
We recommend downloading the latest software.
LI19 is battery powered, using 2 x AA-typebatteries. Fresh batteries allow more than 50 daysof operation. The system is supplied in a practicaltransport case, for easy transport and protection
during field measurement campaigns. LI19 may be
used with pyranometers and heat flux sensors.

OperationFigure 1 LI19 read-out unit / datalogger.

Operation of LI19 is easy. Directions for use:•switch on LI19, connect the sensor•
optional: mark the units of measurement on
LI19, in the window below the display•
connect LI19 to a PC, using the USB cableand the LI19 software•
program sensor model and sensitivity•
switch off LI19 and restart LI19, check sensor
sensitivity settings on the display (displayed
1 s after startup)•
optional: program the storage interval andstarting time of storage. NOTE: switching off
LI19 will discontinue data storage•
disconnect LI19 from the PC•
start a mobile measurement•later actions: export data to the PC

Suggested use•••short-term field measurement of solar
radiation or heat flux
amplification of heat flux sensor signals
education in solar energy

Latest software
Figure 2 Application example: SR05-A1 Class C
pyranometer with LI19 read-out unit / datalogger.

the latest software should be downloaded fromhttps://www.hukseflux.com/downloads

Copyright by Hukseflux. Version 2311. We reserve the right to change specifications without prior notice
Page 1/2. For Hukseflux Thermal Sensors go to www.hukseflux.com or e-mail us: info@hukseflux.com

Hukseflux

Thermal Sensors

LI19 design
LI19 is built for easy use with a large size LCD,
displaying quantities in W/m2, and a USB
connection.

LI19 specifications
Output on display
Input
Conversion
Display definition
Display refreshment rate
Calibration uncertainty
Temperature dependence
Sample rate
Rated input range
A/D conversion
Stored measurement definition

Storage capacity
Storage interval range

Figure 3 Application example: with HF03 heat flux sensor.

Compatibility with Huksefluxsensor models
Battery typeInternal power supply voltage
Battery life
Rated operating temperature
range
System requirements
for use with PC
Connection to PC
User interface on PC
IP protection class
Connection to sensor

WeightDimensions LI19Dimensions transport case
Figure 4 LI19 with a pyranometer in a fieldmeasurement.

Delivery••
•
•
•
•
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LI19 with 2 x AA battery
2 spare batteries (type AA)
LI19 softwaretransport case with space for sensors
LI19 product certificate
strip with measurement unit markers
USB cable

heat flux
solar radiation
analogue voltage
division by thesensor sensitivity
4 digits with sign
1 s-1
0.1 %
< 0.5 % + 3 x 10-6 V
over rated range
2 s-1
6.25 to 200 x 10-3 V(selectable)
16 bits
minimum maximum
and average overstorage interval withconversion to W/m2
3518 measurements
2 to 65535 s(selectable)
SR05-A1, HFP01,SBG01, HF03
2 x AA
3 VDC> 50 days (on freshbatteries)-10 to +40 °C
Windows XP andhigher
USB 1.1 / 2.0 low
speed
LI19 software
IP40
2 x (female chassis
plug for 4 mmbanana with screwed
signal wire clamp)
0.175 kg (net)
1.3 kg with carryingcase(70 x 146 x 25) mm(400 x 300 x 120) mm

See also••

SR05 / LI19 Class C pyranometer with LI19for solar radiation measurement
HF03 / LI19 heat flux sensor with LI19 forflare radiation / heat flux measurement

Interested in this product?
E-mail us at: info@hukseflux.com

Copyright by Hukseflux. Version 2311. We reserve the right to change specifications without prior notice
Page 2/2. For Hukseflux Thermal Sensors go to www.hukseflux.com or e-mail us: info@hukseflux.com