DUST ALARM^® 
BROKEN BAG DETECTOR

DustAlarm® Particle Emission (Broken Bag) Detector

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 levels.

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. The 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.

Principle of Operation

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.

Applications

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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.

Features

SENSITIVITY ADJUSTMENT
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 is green.

ALARM POINT ADJUSTMENT
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.

TIME DELAY
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 minute adjustment.

RUGGED CONSTRUCTION
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.

UNIQUE PROBE DESIGN
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 up.

QUICK-DISCONNECT MOUNTING
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.

Options

Remote Probe/Electronics – The DustAlarm is available in a remote electronics/remote probe configuration for high temperature applications up to 450°F (235°C).

Specifications

Warranty

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 an 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.

Part Numbers / Product Configurations