Density Meter Provides Online Measurements

Endress and Hauser has brought out the Liquiphant M, a meter that provides online measurement of density and concentration. A built-in density calculator can be end-user customised with complex tables and mathematical interdependencies, allowing the meter to provide the same kind of density and concentration measurements once possible only with lab instruments. Because the Liquiphant M provides online measurements, it allows control systems to react much faster to changing process conditions.

Instead of waiting for results to come back from the lab, a control system can take corrective action immediately by performing closed-loop control. The Liquiphant employs a mechanically oscillating fork with two tines that are each excited to resonant frequency. The frequency changes when the fork is immersed in any liquid. If the vibration falls below a predetermined frequency, the sensor reports the covered state to subsequent switching electronics. The tines are excited by a piezoelectric drive. The resonant frequency depends on the moment of inertia of the fork as well as the membrane stiffness; the frequency measures approximately 1000-1200Hz in air. Changes in resonant frequency are directly interrelated with the density of the medium.

In a lower-medium density, such as liquefied gas, the resulting resonant frequency is higher than in more pronounced densities such as water. The electronics of the Liquiphant can measure this change in the resonant frequency. The density of the medium can also be calculated, taking temperature and process pressure into consideration. Concentration can be calculated in mass or volume units. For example, 'Degree Brix' is a measuring unit for the specific density of liquids. This is useful in the food industry for determining sugar content in fruit juices, or in oil production to measure the salt concentration in tanks.

Customers can customise the Liquiphant M for many density and concentration applications, including: content measurement and concentration; quality statements (such as mineral oil or milk); purity indication; product identification; as a changing variable indicating the metabolism in relation to kinetic statements (reaction rate); as a basic variable for physical calculations or simulations; or for clarification of how much material is contained in a given volume. The Liquiphant M Density meter can provide analytical process information online and inline according to customer requirements.

It offers solutions for a variety of applications, including process optimisation, quality monitoring and waste reduction. The meter can also be used for monitoring preliminary, interim and final products during blending operations - and for verification and documentation of process steps. Because it reduces the need for offline laboratory measurements, it also improves plant availability and speeds up responses to changing conditions.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more