Litemeter Current PRO – Analog Photovoltaic Pyranometer

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Litemeter Current PRO – Analog Photovoltaic Pyranometer

Litemeter Current Pro is an analog photovoltaic pyranometer (or irradiance sensor)

It is equipped with a monocrystalline silicon cell for high efficiency, and temperature compensated output. Manufacturing and Calibrations are done following the IEC 61215, IEC 60904-2; 60904-4; 60904-10 regulations.
This irradiance sensor is the laminated glass version of the Litemeter Current sensor. The cell is laminated with a high performance anti-reflective glass for photovoltaic modules and E.V.A.

The current output 4-20mA allows the analog signal to remain unchanged in cases whereas the distance between the sensor and the control unit is 10m and more, or in disturbed areas. Distance up to 20-35m are attainable if there’s no signal interference.

Note: the terms irradiance sensor, photovoltaic pyranometer, reference cell and solarimeter are interchangeable. On this site we will use photovoltaic pyranometer. To learn more click here.


Each Litemeter LM1-420 PRO is calibrated for comparison with our PV Reference Cell calibrated periodically by the Dakks accredited ISFH Institute and a HP34410A Multimeter

Key features

  • Output 4-20 mA
  • Anodized aluminum housing for high durability
  • Anti-reflective glass with E.V.A.
  • Temperature compensated signal
  • Error tolerance of 3%
  • Calibrated for comparison with our PV Reference Cell calibrated periodically by the Dakks accredited ISFH Institute and a HP34410A Multimeter
  • Complies with IEC 60904
  • IEC EN 61724-1  compliant (standard for PV Monitoring Sistems)
  • Mounting bracket for easy installation.
  • Easy to use
  • IEC EN 61215 par.10,11,12 compliant – (aging)

Common uses

Although it is usually employed in smaller PV systems, thanks to its high EMC immunity, Litemeter Current Pro can also be used in larger photovoltaic systems.


PRODUCT LM1-420 PRO solar irradiance sensor with monocrystalline silicon cell (photovoltaic pyranometer)
REFERENCE STANDARDS IEC 60904-2; 60904-4; 60904-10;
Input range Irradiance 0 ÷ 1600 W/m(IEC EN 61724-1 compliant)  
Output signal Current 4÷20mA (max output: 25mA)
Output precision Irradiance ± 3% temperature compensated
Working temperature -25 ÷ +80°C
Response time < 100 milliseconds
Sensor type Temperature compensated solarimeter
Supply External current loop 9 ÷ 30 V DC
Encapsulant Glass + E.V.A. + Poliester
Cable 50cm, UV and high temperature resistant cable
Connects Female 3 pin (IP67 code)
Dimensions 98x55x25 mm without bracket
IP code IP 65


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Protection against lightening

Protects irradiance sensors and photovoltaic monitoring equipment from lightening induced overvoltages. Discover Blitz-Wall!


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