Many industrial systems rely on known pressure levels.
In some cases, the pressure must be within an acceptable band and in others, a constant pressure is required.
Traditionally, the pressure was monitored using pressure guages and pressure switches.
Modern systems use pressure transducers which convert pressure to an electrical signal which is monitored by electronic apparatus and either used to display the pressure, provide pressure feedback in a closed loop system, or provide operating pressure limits.
Pressure transducers can be used to monitor the pressure of gasseous or liquid mediums.
Many Irrigation systems are designed to operate at a constant pressure where the operating pressure is minimised as a means of reducing the hydraulic energy wastage in the system. The MPM489 pressure transducer is used in conjunction with a Variable Frequency Drive to control the pump speed such that the system pressure becomes independent of the flow.
Water Supply systems
Town water systems operate on a “constant head” which means that the pressure at the consumer is constant. This is commonly achieved by using an elevated resevoir so that the system is gravity fed with the pressure set by the elevation of the resevoir.
In some towns, this is not a practical solution as there is no elevated areas that can be used and so the pressure is generated by electric pumps. Using an MPM489 pressure transducer and VFD to control each pump, results in a constant pressure (head) in the system.
The level of water in a resevoir or in a well is commonly measured by an MPM489W Level Transducer.