Omega Engineering
Designed for use both in the field as well as in the laboratory, the DOB21 benchtop dissolved-oxygen meter (photo) is ideal for testing water, wastewater, biological samples and others. The instrument automatically compenstates for temperature, salinity and barometric pressure, and features automatic calibration. The DOB21 has a three-button keypad for programming and can log up to 99 data points. — Omega Engineering Inc., Stamford, Conn.