Monitor Technologies LLC was founded by George Gruber in Port
Sanilac, MI in 1958. The company was then known as Sanilac Manufacturing
Company and had a product line consisting of two (2) rotary paddle
units, the Model M and MX. In 1960, Mr. Gruber moved the company
to Minden City, MI and adopted the name Monitor Manufacturing. This
name would define the company for the next 38 years.
By 1965, Monitor’s
product line consisted of three (3) rotary paddle units and one
(1) model of a diaphragm switch unit. Over the
years the product line grew and by 1980 consisted of twenty-two (22)
products used almost exclusively for the level detection of powder
and bulk solids materials. Our customer base grew from approximately
130 accounts in the early 1960’s to over 10,000 worldwide.
1980, other products have been added through acquisition and internal
development. In 1965, Monitor was acquired by D K Manufacturing.
Monitor’s sales offices moved to D K’s location in
Batavia, IL while the manufacturing operations remained behind
Several years later in 1972 D K Manufacturing, including Monitor,
was acquired by CRL. In 1977, Monitor had outgrown both the Batavia
Minden City locations and the entire Monitor Manufacturing operation
was consolidated in a new facility built in Elburn, IL where we
are located today.
Monitor’s product line continued to expand.
RF Capacitance and Vibratory technologies were added to its existing
mechanical and electromechanical
product lines for point level monitoring. The company’s weight & cable
inventory monitor was developed and became an industry standard.
Some product lines that didn’t fit Monitor’s focus
on instrumentation for powder and bulk solids were sold off in
the early 1990’s,
and the Company went through a management buyout and changed its
name to Monitor Technologies LLC in April of 1998.
In the late
1990’s and into the first decade of the new millennium
new technologies were added through development, such as our SiloPatrol® smart
weight & cable inventory monitoring system and SiloTrack™ PC-based
inventory management software. Other new products were brought
to the market during this time frame through strategic partnerships.
focus on quality was first exemplified in 2000 when it achieved
certification to ISO 9001 standards.
Monitor’s current focus
remains that of instrumentation for powder and bulk solids applications.
committed to be second-to-none in delivering the highest degree
of customer satisfaction delivered through every contact our customers
have with us. We will not accept anything less. Our SecureCaresm
service is dedicated to this end.
Today, Monitor Technologies LLC
offers superior solutions in level monitoring, solids flow detection,
particle emission monitoring
and bin aeration. Give us a call today and let us put our creative
to work for you!
Spotlight: RF Capacitance Level Sensor
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
Maximized reliability via smart sensing algorithms like “self-validating” fail-safe
protection > Visible status LED on ordinary loc 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,
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:
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.