Solar Irradiance Meter

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Measure solar irradiance, ambient and PV module temperature, array orientation and tilt angles

SKU: FLK-IRR1-SOL Categories: , Tags: ,


Fluke IRR1-SOL Irradiance Meter: An Essential Tool for Solar Panels

If you're surveying, installing, executing maintenance, or checking the performance of solar panels or a photovoltaic system, the Fluke IRR1-SOL Irradiance Meter is an invaluable tool. It provides the four critical measurements needed in one easy-to-use tool.

  • Solar Irradiation Measurements: Make instantaneous measurements to determine the watt per square meter solar irradiation, a requirement stipulated by the IEC 62446-1 standard.
  • Temperature Measurement: Measure the temperature either by placing the meter directly on the panel or by connecting the external probe.
  • Cardinal Direction and Tilt Verification: Find the cardinal direction with the built-in compass, and verify the inclination of a roof or panel with the tilt function.
  • Determining the Expected Solar Production: To find the expected production at a site, determine your solar resource while taking shading into account. The solar resource is measured in peak sun hours: the number of hours per day with 1,000 watts generated per square meter of solar array. Factors such as location, time of day, season, and weather conditions all influence peak sun hours.


  • Solar Irradiance Meter
  • External Temperature Probe with Suction Cup
  • Carrying Case with Sholder Strap
  • 4 x AA Batteries


Measuring Range100 to 1400 W/m²
Resolution1 W/m²
Measuring Accuracy± (5 % + 5 Digit)
Note: Irradiance measurement accuracy is specified for an angle of incidence ≤35 degrees from the sun at AM1.5 (ASTM G-173) spectrum.
Temperature Measurement
Measuring range (°C)-30 °C to 100 °C (-22 °F to 212 °F)
Resolution0.1 °C (0.2 °F) / 1 °F @>100 °F
Measuring Accuracy"±5 °C (±9 °F)@ -10 °C to 75 °C (14 °F to 167 °F),
±8 °C (±14.5 °F)@ -30 °C to -10 °C (-22 °F to 14 °F), and
75 °C to 100 °C (167 °F to 212 °F)"
Note: Temperature measurement response time: ~30 sec.
Inclination Angle
Measuring Range-90° to +90°
Measuring Accuracy (typical)± 1.5°@ -50° to +50°
±2.5° @ -85° to -50° and +50° to +85°
±3.5° @ -90° to -85° and +85° to +90°
Measuring Range0° to 360°
Measuring Accuracy±7°
a) Measurements valid for device inclination between -20° and +20° to horizontal. Outside that range on LCD will be shown "---".
b) Result is referred to magnetic north.
Operating Temperature IRR1-SOL-20 °C to 50 °C (humidity <80%), noncondensing
Operating Temperature 80PR-IRR-30 °C to +100 °C
Storage Temperature-30 °C to 60 °C (humidity <80%)
Altitude0 m to max. 2000 m
Electromagnetic Compatibility (EMC)
InternationalIEC 61326-1: Portable Electromagnetic Environment
CISPR 11: Group 1, Class A
Group 1: Equipment has intentionally generated and/or uses conductively-coupled radio frequency energy that is necessary for radio frequency energy that is necessary for the internal function of the equipment itself. Class A: Equipment is suitable for use in all establishments other than domestic and those directly connected to a low voltage power supply network that supplies buildings used for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in other environments due to conducted and radiated disturbances.
Caution: This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in such environments.
Korea (KCC)Class A Equipment (Industrial Broadcasting & Communication Equipment)
Class A Equipment (Industrial Broadcasting & Communication Equipment)
Class A: Equipment meets requirements for industrial electromagnetic wave equipment and the seller or user should take notice of it. This equipment is intended for use in business environments and not to be used in homes.
USA (FCC)47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103.
IP ProtectionIP40
Power Supply & Battery Life
Batteries4 AA Alkaline Batteries
Battery Life (typical)50 hours (≤9000 readings)
Auto Power Off30 minutes
L x W x H150 x 80 x 35 mm (5.90 x 3.14 x 1.37 in)
Weight231 g (0.5 lb)

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