models PAC-30U and PDC-30 proximity bin level switches are
solid state point level devices used to detect the absence
or presence of bulk solids. The compact configuration makes
this product ideal for tight spaces or low cost level detection.
As material comes in contact with, or in close proximity to,
the PAC-30U or PDC-30, an internal solid state switch is activated.
The PAC-30U is AC operated (20-265 VAC) and is universal in
that it is switch selectable for either normally open or normally
closed operation. The PDC-30 is DC operated (10-40 VDC) and
is available in either PNP or NPN configuration, each of
which can be wired in either a normally open or normally
closed operation mode.
PAC-30U and PDC-30 are RF capacitance-type level controls,
which operate by detecting the electrical effect of the surrounding
material such as air, plastic pellets or powders. A radio
frequency is applied to the proximity switch sensing region
and is continually analyzed to determine the influence of
the surrounding environment. Since all materials have dielectric
constants and conductance values that are different from
that of air, the resultant impedance seen by the radio frequency
changes whenever material approaches or contacts the sensing
region. This influence is measured within the circuitry and
compared with the reference point set by the sensitivity
adjustment, which determines how much influence must be present
before the output changes.
(NEMA 4 equivalent)
VAC, 45-65 Hz
to 25 mm adjustable
Closed or Normally Open, Switch Selectable
of Operating Cycle:
176° F (-25° to 80° C)
6ft(1.8m), 18-20 AWG
(with mounting well)
General Purpose; CE Mark
IP67 (NEMA 4 equivalent)
Mounting Thread Size:
M30 x 1.5
0 to 25 mm adjustable
13-8231, NPN (sinking)
13-8241, PNP (sourcing)
Frequency of Operating Cycle:
–22° to 185° F (-30° to 85° C)
Cable, 6ft(1.8m), 18-20 AWG
(with mounting well)
Technologies warrants each proximity switch it manufactures
to be free from defects in material and workmanship under
normal use and service within two (2) years from the date
of purchase. The purchaser must notify Monitor of any
defects within the warranty period, return the product intact,
and prepay transportation charges. The obligation of Monitor
Technologies LLC under this warranty is limited to repair
or replacement at its factory. This warranty does not apply
to any product which is repaired or altered outside of Monitor
Technologies' factory, or which has been subject to misuse,
negligence, accident, incorrect wiring by others, or improper
Updated April 1, 2016
Mass Flow Measurement Systems
The QuantiMass in-line mass flow sensor measures the flow of quantities in pneumatic conveying & free-falling processes. The sensor is based on the latest Microwave Doppler Effect technology and provides fast, in-line / on-line measuring without the use of weight scales.
The sturdy, non-intrusive design of the sensor minimizes maintenance. In addition, the compact size of the sensor makes for easy installation into existing processes. Suitable for powders, dust, pellets, and granular up to 0.75 inch (2cm).
Ultra Series-Includes controller
PRO Series-Includes transmitter
A practical application for the QuantiMass would be to monitor material flow rates to verify blending mixture ratios.
Principle of Operation:
The QuantiMass Mass Flow Measurement Sensor / Meter is designed with the latest microwave technology and is used to continuously quantify the flow of powders & solids being conveyed in metallic pipes. The QuantiMass is based on technology that has been developed and proven over several years. The measurement process of the sensor is centered on the Doppler effect. The mass flow-rate is determined by evaluating the frequency and amplitude changes during the measurement process. Particles at rest, such as deposits, do not influence the measurement. All powders, dust, pellets and granules can be measured reproducibly, up to the size of 0.75 inch (2cm). The QuantiMass sensor is suitable for continuous in-line / on-line measurements in pneumatic conveying or in free-fall pipelines.