:: Product Information

LSM Light Sensor Meter for Pyranometers



  • Climate and ecosystem modelling

  • Crop growth environment

  • Intercepted radiation within and beneath canopy

  • Photosynthetic activity within canopy and light use efficiency


  • Stand-alone, wireless data logging, low power requirement

  • Up to 5 sensor capacity

  • Solar radiation and/or PAR measurements

  • Automatic calculations of intercepted radiation by canopy

  • Flexible sensor calibration, look-up tables, and user scripts

  • IP-65 weather proof rated


Analogue Channels

5 differential





Minimum Logging Interval

1 second

Delayed Start

Suspend Logging, Customised Intervals

Sampling Frequency




USB, Wireless Radio Frequency 2.4 GHz

Data Storage

MicroSD Card, SD, SDHC & SDXC Compatible
(FAT32 Format)

Software Compatibility

Windows 7, 8, 8.1, 10 and Mac OS X.

Data File Format

Comma Separated Values (CSV) format for compatibility with all software programs

Memory Capacity

Up to 16GB, 4GB microSD card included.


Temperature Range

-40°C to +80°C

R/H Range

0 -100%


User upgradeable firmware using USB bootstrap loader function


Internal Battery Specifications

960mAh Lithium Polymer, 4.20 Volts fully charged
External Power Requirements
Bus Power8-30 Volts DC, non-polarised, current draw is 190mA maximum at 17 volts per logger
USB Power5 Volts DC
Internal Charge Rate
Bus Power60mA – 200mA Variable internal charge rate, maximum charge rate of 200mA active when the external voltage rises above 16 Volts DC
USB Power100mA fixed charge rate
Internal Power Management
Fully Charged Battery4.20 Volts
Low Power Mode3.60 Volts – Instrument ceases to take measurements
Discharged Battery2.90 Volts – Instrument automatically switches off at and below this voltage when no external power connected.
Battery Life varies

Example A: With a recommended solar panel and/or recommended power source connected, operation can be continuous.Example B: Power consumption is dependent on number and type of sensors connected, frequency of measurement and measurement duration

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Dianjiang Group Limited
Add: Room 1510,15/F,New Commerce Centre, No.19 On Sum Street, Shatin, N.T., Hong Kong.
Tel: (852) 3690 1588   Fax: (852) 3690 1586
Email: Dianjiang_HK@yahoo.com.hk   Hongkong@Dianjiangtech.com
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