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November 2004: Diaphragm • Tilt Switch

 

Diaphragm
 
Non-Intrusive Switch, Better for the Bottomline!

Elburn, IL. —Monitor Technology’s BINATROL® diaphragm switches are used to cost effectively detect the point level of powders and bulk solids in storage bins. BINATROL® units can also be used to detect plugged conveyor chutes.

The BINATROL® is flush mounted to the vessel and is non-intrusive. It is installed to allow its sensing diaphragm to be exposed to the material being detected. Bulk material contacting the unit applies a pressure that is detected by the diaphragm. This pressure detection activates an internal switch that is accessible for indication of material presence. BINATROL® diaphragm switches are mechanical devices that require no input power. All installation, sensitivity adjustments, and maintenance can be done from outside the vessel.

Monitor offers a variety of BINATROL® models that offer:

  • Adjustable switch sensitivity for material densities as low as 10 lb/ft3 (160 kg/m3),

  • Neoprene, Teflon and Stainless Steel diaphragms for compatibility with a wide range of materials, and

  • Approvals for ordinary and Class II; Division 1, 2; Groups F, G locations

BINATROL® has been the industry’s preferred diaphragm switch for over 20 years.

For more information on BINATROL® diaphragm switches, or any of Monitor’s full line of level, flow, particle emission or aeration products, contact: Emily Jones at 1-800-766-6486.

Tilt Switch
 
Hands Free Tilt Switch For You

Elburn, IL. —Monitor Technologies line of tilt switches provide cost effective solutions for the high level detection of bulk solids. Tilt switches are used to prevent overflow of solids from storage bins, or control solids levels in open piles. Tilt switches can even be used to prevent under loading or over loading of solids on conveyor belts.

Typically, the unit is suspended above the material being detected. Rising material makes contact with the switch enclosure, causing it to tilt. When the body is tilted by more than 17o, an internal switch is deactivated, providing indication of high material level. The unit has only one moving part. It requires no calibration or power, and minimal maintenance.

The light duty model TC-3X is constructed from cast aluminum and is suited for moderately sized solids having a density of 15-60 lb/ft3 (240-960 kg/m3). It can be used in hazardous area locations. The heavy duty model TC-1 is made from cast iron. It is ideal for heavy, coarse solids having a density greater than 45 lb/ft3 (720 kg/m3).

For more information on tilt switches, or any of Monitor’s full line of level, flow, particle emission or aeration products, contact: Emily Jones at 1-800-766-6486.

 
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


 

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