LI19
Hand-held read-out unit/data logger
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- highly accurate
- for a variety of sensors
- communicates over USB
Handheld read-out unit/data logger
LI19 is a high-accuracy handheld read-out unit / data logger. It is used to make mobile measurements, for short term data logging (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.
- highly accurate
- for a variety of sensors
- communicates over USB
Specifications
| output on display | heat flux, solar radiation |
| input | analog 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 |
All specifications
| output on display | heat flux, solar radiation |
| input | analog 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 Hukx sensor models | SR05-A1, 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 |
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Data logger for 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 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
*Additional products, as seen in the images on this page, are sold separately.
Frequently Asked Questions
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Where can I find complete heat flux measuring systems?
Hukx, market leader in heat flux measurement, offers both sensors and systems.
These measuring systems typically include a Measurement and Control Unit and one or more sensors for measuring heat flux as well as other measurands, such as temperature and humidity. Examples are the TCOMSYS01 Hot Cube thermal comfort measuring system, including a TCOM01 sensor, and the TRSYS01 measuring system, incorporating two HFP01 heat flux sensors and two pairs of matched thermocouples.
'Sensors only' can be found here. Complete measuring systems are displayed here, on a separate page.
Cannot find what you are looking for? Please contact us.
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