Level Measurement & Control

Low maintenance ,high reliability level measurement for food aplications

Jan 2000 Level Measurement & Control

Krohne Measurement has released details of the latest version of the Reflex Radar BM100, a level sensor suitable for many applications within the food industry. Ideal for the measurement of all liquids, powders and other food products with a dielectric constant greater or equal to 1,05, the BM100 has no moving parts and offers low cost with virtually maintenance free operation.

The BM100 consists of an external, flange mounted electronics and display unit bolted to a stainless steel rod or cable probe assembly. The sensor operates by emitting an electromagnetic pulse down the probes. When the pulse reaches a layer with a defined change in dielectric value, for example, between air and beer, part of the pulse is reflected back toward the sensor where it is translated into a level measurement. The remainder of the pulse can also be used to monitor the next product layer or interface.

This method of operation ensures that the sensor probe continues to operate with a high degree of accuracy irrespective of the food material being measured while remaining insensitive to clogging or encrustation by deposits. Furthermore, unlike traditional radar, detection of the reflected pulse is unaffected by the shape of the tank or silo in which it is positioned. Consequently, the BM100 can be used in process conditions that would render conventional level sensing techniques, such as ultrasonic and capacitance devices, unreliable or inaccurate.

The BM100 offers high reliability and repeatability of ±1 mm for liquids and powder. It can be used in conditions from -30 to +240°C and from full vacuum to 100 bar, with CENELEC certification for Zone 0 applications in liquids and Zone 10 dust approval for powders.

The BM100 range is already used in a wide range of food applications with materials varying from sugar, rice, wheat and corn to freshly steamed cooked mashed potato, coffee and beer. For example, one flour plant in the US is using the level sensor to monitor the swelling of wheat grain as it absorbs water.

The BM100 has various communication options available including the Windows-compatible 'PC-Star' configuration and diagnostics, a Hart 'smart' connection and can also be supplied with an RS485 connection. For further flexibility, an explosion proof enclosure and an intrinsically safe output option can also be supplied where required. A cost effective lightweight version of the device, the BM100L is also for use on all non-Ex liquid foods up to a depth of 24 m.


(011) 314 1351

Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Continuous non-contact level measurement with radar technology
KROHNE Level Measurement & Control
Online teaser: A narrow beam angle of 4° for tank internals and long nozzles is combined with accuracy down to ±2 mm, even in processes with fast-changing levels and low dielectrics.

Plumb bob sensor for tanks and settling basins
Morton Controls Level Measurement & Control
Its precise sensitivity can be adjusted to slurries and solids in liquids, and can also be configured for use in corrosive media with increased resistance.

Level measurement – now with Bluetooth
WIKA Instruments Level Measurement & Control
The instrument’s description, TAG number, and 0% and 100% marks can be configured via an app on a smartphone or tablet.

Radar sensor keeps its cool
VEGA Controls SA Level Measurement & Control
The VEGAPULS C 21 delivers exact measuring results without effect from the medium, or the process and ambient conditions

Load sensor for force measurement
Instrotech Level Measurement & Control Mass Measurement
The instrument provides a solution for non-intrusive level measurements of materials that are subject to uneven build-up, bridging or sidewall collection.

Diesel level sensing for rail engines
Instrotech Level Measurement & Control
Diesel fuel levels are measured, recorded and displayed, and kilowatt-hours are measured, using the Senix ToughSonic CHEM 10 ultrasonic sensor.

Radar level sensor with IO-Link interface
ifm - South Africa Level Measurement & Control
Its non-contact radar measuring principle prevents malfunctions or failures of the sensor caused by the adhesion of viscous media or damage from agitators.

Why are rate of change alarms used?
Omniflex Remote Monitoring Specialists Level Measurement & Control
Often the domain of control and safety software, rate of change alarms can be implemented in hardware to benefit from an additional layer of protection to systems or processes.

Vibronics, Liquiphants, and human brainpower set free
Endress+Hauser South Africa Level Measurement & Control
Why are field device manufacturers continually developing new technologies? On the one hand, these technologies make work outside in the field easier. Fewer qualified personnel are needed and the technologies ...

“Oops! I forgot to check” – How a simple switch can prevent critical system failure
Hydrasales Level Measurement & Control
Daily checks of hydraulic systems, or checks at the time of employee shift changes, are good practices that should be part of a successful maintenance programme.