Read what people are saying...

"Your CO2 sensors are very nice, carefully made, and do their job exactly as advertised. All I needed to turn them into a portable meter was a package and a display, which I had no trouble making. I found the support staff both prompt and helpful, and am a satisfied customer."

Hal Lewis
Emeritus Professor of Physics
University of California, Santa Barbara

After the overwhelming interest in the pSense sale recently, we've decided to try again with the pSense-RH portable CO2 meter.

Normally $459.95, we are offering these hand-held meters for $399.

For a limited time you can purchase an industrial-quality 0-5,000ppm CO2 meter at a better price than we offer wholesale customers!

The pSense uses infra-red NDIR sensing technology. It is powered by 4 AA batteries (included), comes in an ABS plastic carrying case, and can quickly and easily be calibrated outdoors.

This offer won’t last. Click here to order yours today.

Affordable, open source data-logging sensor for indoor and outdoor applications

The K-33 Portable Sensor Kit (PSK) “wakes up”, records CO2, temperature and %RH levels, and powers itself down again. It can be configured to record once a minute up to once every 18 hours, and can store 5,200 time-stamped data records in memory. Inside the PSK are the three low-powered sensors and four AA batteries, making it a completely self-contained unit smaller than a paper-backed book.

Available in two models, the K-33 ELG PSK measures environmental carbon dioxide levels up to 10,000ppm, while the K-33 BLG version can measure up to 30% (300,000ppm) CO2 concentrations for biological or industrial applications. The NDIR dual-beam infrared CO2 sensors are designed to achieve maximum accuracy over long periods of time. Read more...

It’s easy to understand why people confuse CO-carbon monoxide and CO2-carbon dioxide. The names sound the same, they both are colorless and odorless gases, and at high concentration, both can kill you.

The media doesn’t help. Back in the old days, movies taught us that you could commit suicide by sticking a garden hose in your car’s tailpipe and window, then gunning the motor till the CO put you to sleep. Today they tell us the car’s tailpipe is a major source of the greenhouse gas CO2.

It’s important that you understand the difference. (continued)