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.

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Extech Instruments 401025 Light Meter

Product ID: 294918613

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Description

Specifications

ASIN	B000NI4BMW
Batteries	2 Lithium Ion batteries required. (included)
Best Sellers Rank	#15 in Photographic Light Meters
Date First Available	February 14, 2007
Is Discontinued By Manufacturer	No
Item Weight	8.1 ounces
Item model number	401025
Manufacturer	Extech
National Stock Number	6695-01-469-6038
Product Dimensions	4.1 x 2.5 x 8.4 inches

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