Fluke IRR2-BT Solar Irradiance Meter
£415.00 / £498.00 incl VAT
⚡ Measures solar irradiance, ambient and PV module temperature, array orientation and tilt angles
⚡ Generate instant measurements to determine the watts per m² solar irradiation, required by IEC 62446-1 standard
⚡ Built-in high contrast LCD screen with large font for easy readability in direct sunlight
Available on back-order
Description
Fluke IRR2-BT Solar Irradiance Meter
Rugged and compact, this irradiance meter has an easy-to-read, high-contrast LCD screen that allows users to read measurements in direct sunlight, perfect to bring along with you wherever. Easily meets the IEC 62446-1 requirement for testing, documenting, and maintaining photovoltaic systems with its simple user interface and built-in temperature sensor. In addition, the integrated compass and inclination sensor allows you to quickly measure and document roof and site orientation, pitch, and panel tilt while surveying, installing, or adjusting an installation.
Key Features:
- Make the critical measurements needed for installing, testing, maintaining, and reporting on solar panels or photovoltaic systems with one, easy-to-use tool
- High-precision mono-crystalline solar sensor: Instantaneous irradiance measurements up to 1400 W/m2
- Two options for temperature measurement: Use the built-in temperature sensor or the external suction mount temperature probe to measure ambient and panel temperature
- Integrated compass: Measure and document roof or site orientation
- Inclination sensor: Know roof and PV panel tilt when surveying, installing, or adjusting the installation
- Mounting solution: Ensure proper irradiance measurements with solar panel mounting
- Instant I-V curve readings: Part of the solution for I-V curve measurements, this unit wirelessly communicates with the SMFT-1000 (sold separately) for instant and accurate readings
Photovoltaic system design and surveying
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 1000 W generated per square meter of solar array. Location, time of day, season, and weather conditions all influence peak sun hours. Determine the actual solar irradiance (Watts/m2) and shading at the site to develop a baseline.
Measuring
Once your system is installed, make sure it is operating as designed by measuring its electrical characteristics and the actual power output of the array. The performance of a photovoltaic array is based on its current-voltage (I-V) curve. Use the irradiance meter to obtain the amount of solar irradiance necessary to calculate the I-V curve of the power output. This meter features wireless communication of recorded irradiance and temperature measurements with the SMFT-1000 Solar Multifunction PV Analyzer (sold separately) to instantly determine the I-V curve of the panels under test. Even when installed correctly, a photovoltaic system may not be producing the expected electrical output. In order to produce the expected output the system needs to receive the correct amount of irradiance energy to generate the DC voltage that is fed into the inverter.
Applications
- Solar installation and maintenance
- PV site surveillance
- Installing, testing, maintaining, and reporting on solar panels or photovoltaic systems
Fluke IRR2-BT Specifications
| Irradiance | Measuring range: 50 to 1400 W/m2 Resolution: 1 W/m2 Measuring accuracy: ±(5% + 5 digits) |
| Temperature | Measuring range: -22 to 212°F (-30°C to 100°C) Resolution: 0.2°F (0.1°C)/1°F at >100°FMeasuring accuracy: ±2°F (±1°C) at 14 to 167°F (-10 to 75°C) ±4°F (±2°C) at -22 to 14°F (-30 to -10°C) and 167 to 212°F (75 to 100°C) Note: Temperature measurement response time is approximately 30 seconds |
| Inclination Angle | Measuring range: -90 to 90° Resolution: 0.1°Measuring accuracy: ±1.5° at -50 to 50° ±2.5° at -85 to -50° and 50 to 85° ±3.5° at -90 to -85° and 85 to 90° |
| Compass | Measuring range: 0 to 360° Resolution: 1° Measuring accuracy: ±7° Note: 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 |
| Temperature | Operating temperature (meter): -4 to 122°F (-20 to 50°C); humidity: <80%, non-condensing Operating temperature (probe): -22 to 212°F (-30 to 100°C) Storage temperature: -22 to 140°F (-30 to 60°C); humidity: <80% Altitude: 0 to maximum 6561.68′ (0 to maximum 2000 m) |
| Wireless Radio Module | Frequency range: 2.402 to 2.48 GHz Output power: 8 dBm |
| Memory | Type: EEprom Size (kB/records): 64 kB/6400 Recording time: 17 hours RTC: Yes (super CAP supply) Communication: BT: BL653 module (only with SMFT-1000) |
| Electromagnetic Compatibility (EMC) | USA (FCC): 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103 |
| Protection | IP40 |
| Power Supply | Type: 4 x AA alkaline batteries Life (typical): 50 hours (≤9000 readings) Auto power off: 30 minutes |
| Dimensions | 5.9 x 3.14 x 1.37″ (150 x 80 x 35 mm) |
| Weight | 0.5 lbs (231 g) |
- Solar Irradiance Meter
- External Temperature Probe with Suction Cup
- Mounting Bracket
- Carrying Case with Shoulder Strap
- 4 x AA Alkaline Batteries
- User Manual
- One-Year Warranty
🚚 Testersmans Shipping Policy
Free Mainland GB Delivery Over £150
We offer free delivery on most mainland Great Britain orders over £150 (ex VAT).
This applies across England, Wales, and most of Scotland, excluding certain remote or offshore postcodes.
If your order total falls just short of £150, or you’re a returning customer, feel free to contact us — we may be able to offer a discount code or delivery workaround.
📞 01945 738112 | ✉️ [email protected]
📦 UK Delivery Options
We work with both Royal Mail and DHL to offer reliable and flexible delivery across the UK:
- Royal Mail – Best suited for lighter parcels and for customers in remote regions, including the Highlands, Islands, and Northern Ireland.
- DHL – Ideal for most mainland UK orders, providing fast, tracked delivery and excellent reliability for time-sensitive shipments.
Our checkout system automatically displays the available delivery services for your postcode and order weight, ensuring you always see the most suitable options.
Note: Heavy, bulky, or freight-only orders will be charged separately.
Our website is designed for quick, transactional purchases rather than bulk or palletised orders.
Please contact us in advance for a tailored freight quotation if your order falls into this category.
⏱ Dispatch & Delivery Timing
We aim to dispatch all in-stock orders promptly, but delivery depends on both when you order and which service you select.
- UK orders: placed by 2:00 PM Monday–Friday are usually dispatched the same day.
- International orders: placed by 2:00 PM Monday–Thursday are usually dispatched the same day.
Orders placed after these times are processed the next working day. This means delivery may occur the following day or later, depending on the courier and service selected.
Once dispatched, your chosen delivery service determines how quickly your parcel arrives:
- Standard services We use Royal Mail Tracked 24 or DHL Parcel as our ‘Standard’ services. They are not guaranteed to arrive next working day.
- Premium services (e.g. Royal Mail Special Delivery or DHL by Noon) offer guaranteed delivery windows.
If your order is time-sensitive, we strongly recommend choosing a guaranteed service or contacting us before ordering to confirm availability.
Please note: For logistical reasons, we may occasionally adjust the delivery method selected at checkout. For example, smaller items may be better suited to letterbox-friendly packaging or may be at greater risk of delay or loss via certain services. We actively monitor courier and postal service disruptions—including strikes and delays—and may modify shipping arrangements to help ensure timely and secure delivery.
📅 Busy Periods & Delays
We always aim to dispatch promptly, but delivery times may be affected by:
- Seasonal demand (e.g. Christmas, bank holidays, or industry shutdowns)
- Courier network delays outside our control
- Supplier lead times or calibration requirements for certain equipment
If your delivery is time-critical, please contact us before ordering so we can confirm stock and courier availability.
🌍 International Shipping
We ship worldwide using UPS Express Saver® and other trusted global courier partners. All international shipments are tracked and generally dispatched Monday to Thursday to ensure smooth customs clearance and transit.
Estimated delivery times:
- Europe: 1–2 working days
- North America: 2–3 working days
- Asia-Pacific & Rest of World: 3–5 working days
Delivery times vary depending on location, customs clearance, and local courier performance.
💰 Taxes, Customs & Import Duties
International customers are responsible for any applicable taxes, customs charges, or import duties.
These are not included in our product or shipping prices.
Your courier will typically provide a secure payment link for any import charges once your parcel reaches customs.
If import fees are refused and the parcel is returned, we will issue a refund minus all incurred shipping and return costs.
📍 Using Your Own Courier
If you would prefer to arrange collection via your own courier (UK or international), please contact us before placing your order to coordinate collection from our Wisbech warehouse.
📝 Important Notes
- Please ensure your delivery address and contact number are correct at checkout.
- Undelivered parcels may be returned to us after a short holding period.
- Redelivery or return fees may apply, even if your order originally qualified for free delivery.
- By placing an order, you confirm your understanding and acceptance of this policy.