Datasheet

Electrical isolation

The Atlas Scientiﬁc Gravity

™

Analog Dissolved Oxygen Meter is a very sensitive device and

is susceptible to electrical interference from external sources. This interference is caused

by micro-voltages entering the water from unnatural sources such as pumps, solenoid

valves, or other probes / sensors. When electrical interference is affecting the D.O. readings,

it is common to see rapidly ﬂuctuating readings or readings that are consistently off.

To verify that electrical noise is causing inaccurate readings, place the D.O. probe in a cup

of water by itself. The readings should stabilize quickly, conﬁrming that electrical noise

was the issue.

To stop electrical interference from affecting the readings, Atlas Scientiﬁc strongly

recommends using our Gravity

™

Analog Isolator. It is 100% effective at preventing

electrical currents in the water from entering the probe and interfering with the readings.

Refer to the Gravity

™

Analog Isolator datasheet for more information about how the

isolator works and how to use it.