YSI6050020 Pro20 Lab/Field Dissolved Oxygen/Temperature Meter, 0 to 50 mg/L, 0.1 mg/L, 0 to 20 mg/L, -5 to 55 degree C, 8-1/2" Length x 3-1/4" Width x 2-13/64" Depth

Todo muy bien.

Good

Muy bueno

Good

These work well, when they work. We are on number five, with two of them junked. In our humid work environment, every one of them has had moisture intrusion. Have sent two back for moisture intrusion, one was repaired under warranty, the other was refused warranty. I was offered a replacement at several hundred dollars over the street price.Buyer beware: if you are in a humid environment, you WILL have moisture inside the LED readout area, and the warranty service is spotty.

When I turned it on and tested the equipment for the first time the screen lit up but there were no numbers or signs in the screen. The sound works, but the screen does not show anything. Trying to figure out how to apply the warranty but there is still not a response.

Maybe mention on the product page somewhere obvious that the meter doesn't come with anything to actually measure dissolved oxygen with. Meter only should be in the title not in the fine print. Probes sold separately.