LI19

Hand-held 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 to a PC. LI19 can be used with a variety of sensors. LI19’s most common application is with heat flux- and  solar radiation sensors. LI19 battery life and memory allow continuous measurement for up to 50 days.

  • High accuracy handheld read-out unit / datalogger
  • Easy transport and protection during field measurement campaigns
  • Supplied in a practical transport case
  • Fresh batteries allow more than 50 days of operation
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Description

LI19 May be Used with Pyranometers and Heat Flux Sensors
LI19 is typically used to display the measured solar radiation or heat flux. It measures a DC voltage. Once programmed with the sensitivity of the connected 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-type batteries. Fresh batteries allow more than 50 days of operation. The system is supplied in a practical transport case, for easy transport and protection during field measurement campaigns. LI19 is built for easy use with a large size LCD, displaying quantities in W/m², and a USB connection. LI19 may be used with pyranometers and heat flux sensors.

Suggested Use

  • Short-term field measurement of solar radiation or heat flux
  • Amplification of heat flux sensor signals
  • Education in solar energy

Areas of Application

  • Industrial monitoring and control / heat flux and heat transfer measurement
  • Solar energy / PV system performance monitoring

Specifications

Output on display

Heat flux, solar radiation
Input

analogue voltage
Conversion

Division by the sensor sensitivity
Display definition

4 digits with sign
Display refreshment rate

1 s⁻¹
Calibration uncertainty

0.1 %
Temperature dependence

< 0.5 % + 3 x 10⁻⁶ V over rated range
Sample rate

2 s⁻¹
Rated input range

6.25 to 200 x 10⁻³ V (selectable)
A/D conversion

16 bits
Stored measurement definition

minimum maximum and average over storage interval with conversion to W/m²
Storage capacity

3518 measurements
Storage interval range

2 to 65535 s (selectable)
Compatibility with Hukseflux sensor models

LP02, HFP01, SBG01, HF03
Battery type

2 x AA
Internal power supply voltage

3 VDC
Battery life

> 50 days (on fresh batteries)
Rated operating temperature range

-10 to +40 °C
System requirements for use with PC

Windows XP and higher
Connection to PC

USB 1.1 / 2.0 low speed
User interface on PC

LI19 software
IP protection class

IP40
Connection to sensor

2 x (female chassis plug for 4 mm banana with screwed signal wire clamp)
Weight

0.175 kg (net) / 1.3 kg with carrying case
Dimensions LI19

(70 x 146 x 25) mm
Dimensions transport case

(400 x 300 x 120) mm

Downloads

Download Product Brochure

Download Product Manual

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