WTW Pocket Oxygen Meters

Highest quality design and materials go into these waterproof field meters.

Completely field-worthy, these waterproof and dustproof Meters come with a large LCD and simultaneous display of oxygen, temperature and time. These Meters give immediate measurements with no polarization time.
Model 315i
Provides basic dissolved oxygen (DO) readings in an easy-to-operate Meter with automatic input facilities.
Model 330i
Features OxiCalŽ for rapid calibration, AutoRead for stable measurements, a datalogger with 500 sets of data storage and auto compensation for temperature, air pressure and salinity.
Model 340i
Same features as Model 330i, but Model 340i offers additional analog and digital RS-232 output. Can operate from rechargeable batteries or 110V power supply.