The DustAlarm® Broken Bag Detector provides
reliable and economical detection of leaks and filter failures
in many powder and bulk solids industries. The DustAlarm
is successfully utilized in a wide variety of applications
where detection of dust levels is critical either to safety,
maintenance, equipment operation, plant efficiency and/or
the environment. The DustAlarm measures the triboelectric
effect to determine when particle emissions exceed acceptable
The DustAlarm Broken Bag Detector incorporates visual indications
and a relay output to maximize its user-friendliness and
automation capabilities. A reference point is set by the
sensitivity control adjustment, aided by the tri-color LED.
The alarm point is set by an alarm level control adjustment.
relay output can be used to activate an alarm device or can
be integrated into a control system to enhance the overall
operation of the dust collector.
Triboelectric measurement, which has been
used for broken bag detection for many years. Also known
as particle impingement or frictional electrification, the
triboelectric effect pertains to the resulting charge transfer
when one material rubs or impacts another.The result of dust
particle collision with a stainless steel probe is the generation
of electrical signals, which are continuously monitored and
analyzed by the electronics. When the signal exceeds a preset
level, a time delay is initiated. If the signal remains above
the preset level for the duration of the delay, alarm relay
outputs are energized.
The DustAlarm® Broken Bag Detector is designed specifically
for broken bag detection and leaking filter detection in
the exhaust ducts of baghouses, cartridge collectors, cyclones,
and any other dust collector containing filters which may
break or wear out.
Typical Applications include,
but are not limited to:
Mining and Minerals
The tri-color SIGNAL LED guides the user through the sensitivity adjustment
procedure. This LED can be yellow, green or red. While the dust collector is
running efficiently and clean, the user adjusts the sensitivity until the LED
The alarm point is adjusted by setting the Alarm LEVEL control (1 to 10 times
the baseline signal level). The emission level exceeds the alarm point, is indicated
by illuminating the SIG>LEVEL LED.
The time delay feature enhances operation and control minimizing the occurrence
of false signals that might occur during normal operation and cleaning cycles
of the dust collector. The time delay provides a 0 to 60 second or 0 to 10
The rugged NEMA 4 housing is to be used in general purpose environments and
incorporates a screw-on/off cover for easy access to the adjustments, a cover
lock mechanism and convenient LEDs used during installation and setup.
The sensing probe is 316 stainless steel with a specially designed PFA extended
insulator that helps protect the unit from false signaling due to product build
The quick-disconnect mounting coupling provided with each unit is used
to mount the DustAlarm to
the exhaust duct or pipe and simplify the removal of the device if necessary
to clean the probe.
Remote Probe/Electronics – The DustAlarm is available
in a remote electronics/remote probe configuration for high
temperature applications up to 450°F (235°C).
to 130 VAC, 50/60Hz
to 260 VAC, 50/60Hz
to 32 VDC
to 160°F (70°C); up to 450°F (235°C)
for remote probe electronics option
150°F (-30° to 65°C)
SPDT isolated relay contact set; 5 amps @ 250VAC
max or 30VDC
grains/dscf (1 mg.m³) typical detection at
maximum sensitivity; 100 to 1 adjustable range
from 0.1 to 22 seconds
level setting indicated by tri-color LED
from 1 to 10 times baseline
range 0 to 60 seconds or 0 to 10 minutes; via
range selector and single-turn control
Alarm condition on power failure
3/4" NPT conduit connection; (2) cable
glands suitable of sealing cords with diameter
in (6.4 mm) to 0.48 in (12.2 mm) are provided
LED indicating: "Low"= Yellow;
Green; "High" = Red
SIG>LEVEL = Yellow
ALARM LED = Red
4, IP65; Designed for general purpose locations
or remote mounted to electronics housing
fitting with ferrule, clamp and gasket
psi (2 bar) maximum
in (76 mm), 6 in (152 mm), 12 in (305 mm) standard;
consult factory for custom lengths
Monitor Technologies LLC warrants each DustAlarm® Broken
Bag Detector 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 give
notice of any defect to Monitor Technologies LLC 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 shall not apply to any product which
is repaired or altered outside of the Monitor Technologies
LLC factory, or which has been subject to misuse, negligence,
accident, incorrect wiring by others or improper installation.
Monitor Technologies LLC reserves the right to change the
design and/or specifications without prior notice.
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 by Muetec Intruments 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.