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Determining The Minimum Specific Gravity Difference Between Two Liquids
A very common output signal for sensors of all kinds, 4-20mA has a few very good reasons why it has been so popular for so long:
Long Cable Runs
The 4-20mA output allows for cable runs over 1000 ft. with almost no signal degradation and without regard to any voltage drops in the wire.
Back up pump control is a critical part of any pump control application, ensuring that failure does not result in a potentially hazardous overflow or the unwanted emptying of a tank. Ideally, back up sensors work independently from the control system, so that failure of the primary controls will not disable them.
Rapidly changing liquid levels can overwhelm a single pump, and cause excessive wear and tear. To prevent this, additional pumps can be added to control the liquid level.
Ultrasonic level sensors are great at measuring the distance, or level, of many different material targets. However not all targets are created equal:
Poly tanks are used throughout the world for bulk liquid storage and processing. They are durable, lightweight, and compatible with many chemicals. Naturally, not all of these tanks will be installed where a control system is present. When level control is needed in these circumstances, a stand-alone solution is the only option.
With ultrasonic sensors, the most reliable distance readings are obtained when unwanted echoes are reduced or eliminated. This is done when the sensor is set to the minimum power and sensitivities needed to accurately read a target.
A unique water distribution outfit in New England let’s customers fill their own bottles from a network of filling kiosks. The challenge? Keeping the kiosks stocked.
An abrupt change in a remote tank often spells disaster. These can be due to thefts and leaks or unusual usage patterns resulting in an overflow or a shortage. Even when the change is routine, a notification to verify data is always helpful.
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