AC Infinity AIRLIFT S-Series Shutter Exhaust Ventilation Fan with Speed Controller Size:16 in ensuring that the probes are

ensuring that the probes are exposed to a steady flow of water

It does not need contact

Rolled edges give the shell rigidity

ebb-and-flow

Remember - keep your pH probe wet

AC Infinity AIRLIFT S-Series Shutter Exhaust Ventilation Fan with Speed Controller Size:16 in ensuring that the probes areAC Infinity AIRLIFT S Series shutter exhaust fan with speed control The AIRLIFT S Series exhausts heat, moisture, odor, and dust out of a room through a weather sealed shutter. Four sizes cover the range: 631 CFM at 10 inches, 830 at 12, 1513 at 14, and 2560 at 16. A PWM controlled EC motor pushes that airflow while holding noise and power down. Steel shutters close automatically when the fan stops, sealing out weather and pests. EC motor shutter fan