Can you give me a calibration certificate with this unit?

LT300 version with NIST costs $289.00 in our valuetesters store. There is a two week lead time, as each unit needs to be calibrated manually.

What is the lowest fc reading this unit will take? Will it measure as low as 0.02 fc?

We have used this device on almost a daily basis since we examine potential customer sites for our lighting products. We found that the greatest consistent resolution you can get .05 increments reliably as compared to other like devices in the same setting. A good product in our opinion.

what is the conversion formula for lux to PPFD for this unit?

Multiply the Lux by the conversion factor to get PPFD. For example, full sunlight is 108,000 Lux or 2000 µmol m-2 s-1 (108,000 ∗ 0.0185).

I can post the calibration certificate?

I think the question needs to be directed to Extech. I'd be interested in their answer.

Extech Lt300 Light Meter Remote Sensor Peak And Relative Modes

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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NZ$1499

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Sold byAmazon Cook IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💡 Illuminate your space with confidence — never miss the perfect light!

SMART DATA CONTROL - Min/Max, data hold, and zero adjustment let you capture and compare lighting metrics effortlessly.
PORTABLE POWERHOUSE - Lightweight, durable design with protective sensor cover and holster for on-the-go professionals.
SENSOR TECH MASTERY - Cosine and color-corrected sensor guarantees reliable results across all light types—daylight, LED, fluorescent.
EFFORTLESS VISIBILITY - Backlit LCD with analog bar graph ensures clear readings even in dim or challenging environments.
PRECISION LIGHTING INSIGHTS - Measure up to 40,000 lux with pinpoint accuracy for flawless workspace and studio lighting.

The Extech LT300 Light Meter delivers professional-grade light measurement up to 40,000 lux with advanced sensor technology and user-friendly features like a large backlit display and data hold. Its portable, durable design makes it an essential tool for managers, photographers, and safety inspectors aiming to optimize lighting conditions and ensure compliance with workplace standards.

Specifications

ASIN	B000NI69ZY
Batteries	1 Product Specific batteries required. (included)
Best Sellers Rank	#16 in Photographic Light Meters
Date First Available	February 14, 2007
Item Weight	7 ounces
Item model number	LT300
Manufacturer	Extech
Product Dimensions	3 x 1.57 x 5.9 inches

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