Extech LT40 LED Light Meter for Measure The Illuminance of White LED Light

Extech LT40 LED Light Meter for Measure The Illuminance of White LED Light

Q: Does this item come with calibration certificate?

Hello Antonio - there isn't a calibration certificate. Based on the various tests I've done the results make sense and the machine is highly responsive. This isn't what I would regard as a precision instrument, but for my purposes g it worked fine.

Q: Does this product come with a warranty?

Hello, Thanks for your question, yes, the meter has a 2-year warranty, If you have any questions, please feel free to contact our tech support line at 866-477-3687 option 3

Q: With the lt45 what light source setting should be used with fluorescent and sodium lights as the manual only lists incandescent and led's?...

Hi, thanks for your question, there are 10 light source selections (L0 – L9) each having a unique calibration correction factor (multiplier). See the Light Source list below. The multipliers for locations L0 through L6 are fixed for the lighting types listed. Locations L7 through L9 are extra locations that the user can customize (with a multiplier from 0.001 to 1.999). L0: Standard incandescent light source L1: LED white daylight L2: LED AMBER (YELLOW) light L3: LED GREEN light L4: LED RED light L5: LED BLUE light L6: Not used L7~L9: Programmable User Custom Locations (preset to 1.00) if you have any questions, feel free to contact our technical support line at 866-477-3687 option 3

Q: Does this perform well in very bright conditions ( very sunny conditions) and in now light conditions?

I feel that the Extech LT40 LED does respond fairly well in very bright conditions. As I see it, the meter is designed to read environmental conditions, such as light coming into a building or space, or even on the exterior. If you need to read just the solar conditions (visible light) in an unobstructed open space or area there are better, but often higher priced, meters for that purpose. Nick M

Product ID: 50494068

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Details

Brand
Extech
Special feature
LED screen
Colour
Garten
Age range (description)
Adult
Included components
The LT40 comes
Outer material
Plastic

💡4000-count LCD clarity

📏Dual Lux & Foot-Candle units

🛡️Protective sensor cover

Frequently Bought Together

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Description

💡 Illuminate your workspace with precision and style!

READY TO USE KIT - Includes integrated sensor with protective cap, batteries, carry case, and manual—everything you need to measure on the go.
COMPACT LIGHTWEIGHT - Slim 140g design fits perfectly in your toolkit or pocket for professional mobility.
SMART POWER MANAGEMENT - Auto power-off feature maximizes battery life for uninterrupted fieldwork.
PRECISION IN EVERY BEAM - Cosine & color-corrected measurements ensure spot-on illuminance readings.
VERSATILE LIGHTING METRICS - Switch effortlessly between Lux and Foot-Candle units to suit your project needs.

The Extech LT40 is a compact, battery-powered LED light meter designed for accurate measurement of white LED and standard lighting in both Lux and Foot-Candle units. Featuring a 4000-count LCD display, cosine and color-corrected sensor, and protective cover, it offers reliable, professional-grade illuminance readings with smart power-saving auto shutoff. Lightweight and portable, it comes complete with batteries, carry case, and user manual—ideal for managers and professionals demanding precision lighting data on the move.

Specifications

Manufacturer	Extech
Part number	LT40
Item Weight	140 g
Product Dimensions	13.46 x 4.83 x 0.51 cm; 140 g
Batteries	2 AAA batteries required. (included)
Item model number	LT40
Colour	Weiss/opulenter Garten
Style	LT40
Material	PLA_(Polylactic_Acid)
Power source type	Battery Powered
Item Package Quantity	1
Number of Pieces	1
Measurement System	Metric
Display style	LCD
Specification met	CE
Special Features	LED screen
Included components	The LT40 comes with an integrated probe with protective cap, two AAA batteries, carry case and user manual.
Batteries included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline

Have a Question? See What Others Asked

Does this item come with calibration certificate?

Does this product come with a warranty?

With the lt45 what light source setting should be used with fluorescent and sodium lights as the manual only lists incandescent and led's?...

Does this perform well in very bright conditions ( very sunny conditions) and in now light conditions?

Reviews

A**D

Extech LT40

Sturdy and reliable little light meter. Has become my reference light meter.Switches off automatically after 12 seconds but you can override this by pushing on the on/off button for 5 seconds.Automatic ranging very handy.Does not remember your preferences like in my case I am interested in the maximum value during a session so I have to remember to push the max button each time.Struggles in low light less than 5 lux due to the smallness of the sensor, so you cannot measure moon light.

17.06.2016

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