Extech LT300 Light Meter

This unit is working great for my intended purpose (measuring shade on hiking trails). I have connected its voltage output to an analog data recorder so I can view the time-varying light intensity levels on my laptop. The unit has been working great for several weekends of hiking, and does correctly identify shade/sun conditions. My only problem is that the switches are not recessed, so the unit got jostled in my backpack and went into a mode where the data resolution became inadequate for my needs, however I bought a switch cover to fix that issue.

Works great, sensitive, durable and very affordable. If you just need to know relative light levels and are not concerned with hyper-accurate values, you can't beat the Ex-tech LT300. For me this a very good QA/QC tool for comparing scientific instrument consistency.

Love is a strong word, but I more than "like" this little meter, so "love it" it is. I chose this meter for my business to measure ambient light in rooms used to test people's eyes. It is extremely accurate, as I periodically test it against another digital meter and a manual needle meter used in photography. Everything is great about the product except that I have to manually calculate the reading I need because of my specific industry. Only units that are twice the price or more provide the specific calculation I need with the flip of a switch. But I have one such unit, and everytime I compare the readings of both machines, they are dead-on with each other. A little inconvenient, but worth it to me since this unit was about $300 less than my other light meter.

The Extech 401025 was very easy to use right out of the box. It seems to be very accurate so far. I gave it four stars because I believe the light meter should come with a carrying case like most other scientific equipment would.

Nice inexpensive meter. Agrees with my other units and gives me an inexpensive backup.

NIST certification missing!!! Misleading advertising. Publicidad engañosa!!

Se pueden comprar esta marca de equipos útiles para orientarse en cuanto a la medición

Bought this for testing at work...the meter worked fine the first day, had good sensitivity and dynamic range. But it broke the second day and we had to buy another one. It just stopped taking measurements. We did all the normal things, replaced the battery, checked cables and fuse, but it was permanently broken.

Excelente equipo para medir la intensidad de la Luz, confiable y exacto

Bought for a store surveys. Worked well.

I have had this unit before. The cord to attach cap snapped off first day when it slipped from my hand. The wire insert is fragile, which is why I had to replace my original. Works well.