( click here )

May 2011: HMI2 Local Operator Interface Control Consoler
Enhanced Operator Interface Control Console for
Continuous Level Sensors

HMI2 Local Operator Interface

Elburn, IL -- The latest version of the HMI2 control console provides local operator interface for Monitor Technologies’ continuous level sensors. The HMI2 has two RS-485 networks, with a capacity of 16 sensors each, to support up to 32 Flexar® guided wave radar level sensors and/or SiloPatrol® SMU SE “smart” cable-based level sensors. The multi-functional HMI2 controls the operations for the Flexar and SiloPatrol SMU SE “smart” sensors, displays measured and calculated data and performs/displays system and sensor diagnostic messages. Flexar’s real-time continuous output can now be viewed on the HMI2 display for immediate level measurement updates.

Another new aspect of the HMI2 is that it contains a built-in strapping table to produce volumetric or gravimetric calculated readings if the dimensions of a vessel cannot be determined or the vessel is of an irregular shape. According to Greg DeRudder, Product Manager at Monitor, “The strapping table is a great feature for when accuracies of normally calculated volumes and weights just are not satisfactory to the end user.” Also, the HMI2’s improved volume & weight calculations can include the additional amount of material contained in the roof section of storage silos with steep roofs (30 degree angle for example). The HMI2 combined with the Flexar and/or SiloPatrol can create practical solutions for many liquids and most powder and bulk solids materials and process conditions.
Please visit, e-mail or call 1-800-601-6204 for more information.

For more product information please visit:

Monitor Technologies LLC is a dependable manufacturer of level measurement instrumentation, solids flow monitors, particle emission monitors and aeration devices for the worldwide powder and bulk solids markets and many liquid markets. The experience and market knowledge gained over 50 years of business has earned Monitor a reputation for providing high quality and reliable product solutions. Monitor is located in Elburn Illinois. For more information please refer to or contact Mr. Greg DeRudder or Mr. Chris Otte of Monitor Technologies at 1-800-766-6486 (630-365-9403).


Spotlight: RF Capacitance Level Sensor
TrueCap Level SensorsTrueCap Light  
TrueCap® MK-2
Advanced RF Capacitance Level Probe

The TrueCap® Model MK-2 RF Capacitance point level probe is designed to provide a superior and stable sensitivity threshold making it suitable for a variety of powder / bulk solids and some liquid or slurry applications.

Advanced features of the Model MK-2 include:
> Automatic immunity to material build-up on the probe by its driven shield design
> Push-button calibration
> Enhanced temperature compensation
> Maximized reliability via smart sensing algorithms like “self-validating” fail-safe protection
> Visible status LED on ordinary location units
> Versatility through a variety of configuration options including: hazardous location version, split architecture design, quick-connect process connection, stub probe, cable extensions, solid extensions, Nylon® probes, Ryton® - equiv. probes, etc.

A practical application for the TrueCap would be to use this level sensor where a residual material build-up on a different sensor would cause a false material level indication.

Principle of Operation for the TrueCap RF Capacitance Level Probe:
The vessel wall and the active probe element establish an impedance reference between each other when exposed to air which has a dielectric constant of 1. When materials with a dielectric constant greater than 1 are in close proximity to the probe, the impedance of the sensing field between the sensor and the vessel wall will change. Once the amount of change exceeds a threshold that was electronically determined during the calibration process, an output relay will either be energized or de-energized depending upon the position of the fail-safe selector on the probe’s electronic circuit board. A change of as little as .5 pico-farad is all that is necessary for the probe to sense the presence of material.

Click here for more information on the TrueCap MK-2 Level Sensor or contact Monitor Technologies LLC at
Tel.: 800-766-6486 in the USA and
Tel.: 630-365-9403 worldwide.


>>Download TrueCap Product Bulletin #413

>>Click here to learn more about other Point Level Switches from Monitor Technologies


Join Monitor's E-Mailing List!
Enter your Email Address Here:



© 2022 • Monitor Technologies, LLCAll Rights Reserved
Privacy / Cookies Policy & Terms
1.800.601.6319 or 1.630.365.9403

  Translate This Web Page:
Translate text and documents.