Hukseflux

Thermal Sensors

HF03-LI19

Portable heat flux sensor with read-out unit / datalogger
HF03 is a heat flux sensor that is applied in mobile measurements. It is combined with LI19, a highaccuracy handheld read-out unit / datalogger. The combination HF03- LI19 is typically used to study heat
flux levels of flares and fires, and to verify the performance of permanently installed flare radiation
monitors and flare heat flux sensors.

Introduction
HF03 is a heat flux sensor commonly used in fire
testing. It is designed for short (< 10 min)monitoring and measurement in high flux
environments in the heat flux range up to 10 x
103 W/m2.

Figure 1 HF03-LI19 portable heat flux sensor withread-out unit / datalogger

LI19 displays the measured heat flux. Once
programmed with the sensitivity of the connected
sensor, the display will show the actual value ofthe heat flux in W/m2. LI19 is programmed via its
PC user interface. It communicates over USB. We
recommend downloading the latest software.
LI19 may also be used to store measured data.
LI19 is battery powered, using 2 x AA-typebatteries. Fresh batteries allow 50 days ofoperation. HF03-LI19 is not rated for EEx(potentially explosive) environments;
nevertheless it is often admitted, because theinstrument operates on 3 VDC only.

Operation
Operation of HF03-LI19 is easy. As LI19 has
already been programmed at the factory,measurements can start by switching on theLI19. The data storage interval is set by using
the LI19 user interface software.

Figure 2 We offer an extensive range of products for fire
testing and studies of flares. The picture shows HF03LI19 portable heat flux sensor with read-out unit.

Directions for operation:•connect the LI19 to the HF03 sensor•
switch on LI19•
check sensor sensitivity settings on thedisplay (displayed 1 s after startup) against
the HF03 product certificate and hand grip•
check the zero signal with the protection cap
on the HF03•
remove the protection cap from HF03•
check the functionality of the system by short
exposure to a strong heat flux source•
start measurement, write down measured
valuesCopyright by Hukseflux. Version 1610. 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
HF03 specifications
Measurandheat flux
Rated measurement range 0 to 10 x 103 W/m2
Rated exposure time interval 0 to 10 min
Calibration traceability
to ITS90
Standard cable length
5m

LI19 specifications

Figure 3 screenshot of LI19 software user interface on PC

Suggested use••

performance of verification permanently
installed flare radiation monitors such as
HF02
monitoring during fire-safety demonstrations

See also•••our complete line of heat flux sensors
SBG01 for high-accuracy indoor heat flux
flame measurement
heat flux sensors type HF02 (for permanentinstallation close to flares)

Delivery•••••••••

HF03 with cap
programmed LI19 with 2 x AA battery
2 spare batteries (type AA)transport case with space for sensors
LI19 product certificate
HF03 product certificate
strip with measurement unit markers
USB cable
LI19 software

Figure 4 HF03 with its protection cap

Output on display with HF03 heat flux in x 103 W/m2
Stored measurement
minimum maximum anddefinition
average over storage
interval with conversion toW/m2
A/D conversion
16 bits
Temperature dependence< 0.5 % + 3 x 10-6 V overrated range
Display refreshment rate
1 s-1
Battery type2 x AA
Internal power supply voltage3 VDC
Battery life
> 50 days (on freshbatteries)
Storage interval range
2 to 65535 s (selectable)
Storage capacity
3518 measurements
Rated operating temperaturerange-10 to +40 °C
User interface on PC
LI19 software
Connection to PC
USB 1.1 / 2.0 low speed

Latest software
the latest software should be downloaded fromwww.hukseflux.com/page/downloads

About Hukseflux
Hukseflux Thermal Sensors offers measurement
solutions for the most challenging applications.
We design and supply sensors as well as test &measuring systems, and offer related services
such as engineering and consultancy. With ourlaboratory facilities, we provide testing services
including material characterisation andcalibration. Our main area of expertise ismeasurement of heat transfer and thermal
quantities such as solar radiation, heat flux andthermal conductivity. Hukseflux is ISO 9001:2008
certified. Hukseflux sensors, systems andservices are offered worldwide via our office in
Delft, the Netherlands and local distributors.

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

Copyright by Hukseflux. Version 1610. 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