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8 am - 5 pmBack 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.
As sensor design engineers and manufacturers, liquid level sensors and pressure transducers can be broken down into two types: purpose built and field configurable.
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Simplex pump control is a relatively simple task. A float switch with a bit of hysteresis will do just fine. There are, of course, continuous level sensors that may be advantageous under the right circumstances.
Constant on-off cycling (chatter) in tank level pump control applications can add unnecessary wear and tear and lessen the life of a pump.
One of the most popular hazardous location protection methods for sensors is intrinsic safety.
Float switches, and other point level sensors, are great alternatives to the more expensive continuous level sensors (ultrasonic, radar, level probes, etc.).
In addition to the various types of point level sensors for pumping stations, a more advanced approach is growing in popularity. Many businesses and municipalities are using continuous level sensors.
This week, we will cover back-up sensors for lift stations. In the past, we have given an overview of lift station sensors, and discussed both simplex and duplex lift station configurations.
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