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DUST ALARM®
BROKEN BAG DETECTOR
Bulletin Button

Dust Alarm Particle Emission Monitor


Field-Proven Triboelectric Measurement Ensures Reliability
Adjustable Sensitivity, Alarm Level and Time Delay for Operation with a Wide Variety of Powders and Bulk Solids
Integral Assembly of Sensor and Electronics in Rugged NEMA 4 Housing
Remote Electronics/Probe Option Available
316 Stainless Steel Probe with Specially Designed Insulator
Multi-Colored LED Indicator Makes Setup Quick and Easy
Quick-Disconnect Mounting Provides for Ease of Installation and Maintenance

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

.: Applications

.: Features

.: Options

.: Specifications

.: Warranty

 

 
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
(click here to download)
 

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:

Ferrous Metals

Food Processing

Utilities

Non-Ferrous Metals

Feed

Chemical Processing

Pharmaceutical

Mining and Minerals

Foundries

 

 

 

 

 
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

ELECTRONICS:

Power Requirements:

Low Voltage AC:

105 to 130 VAC, 50/60Hz

High Voltage AC:

210 to 260 VAC, 50/60Hz

Low Voltage DC:

10 to 32 VDC

Process Temp:

up to 160°F (70°C); up to 450°F (235°C) for remote probe electronics option

Ambient Temp:

-20° to 150°F (-30° to 65°C)

Output:

(1) SPDT isolated relay contact set; 5 amps @ 250VAC max or 30VDC

Sensitivity Range:

0.0005 grains/dscf (1 mg.m³) typical detection at maximum sensitivity; 100 to 1 adjustable range

Smoothing:

Adjustable from 0.1 to 22 seconds

Sensitivity Setpoint:

Baseline level setting indicated by tri-color LED

Alarm Threshold:

Adjustable from 1 to 10 times baseline

Alarm Time Delay:

Adjustable range 0 to 60 seconds or 0 to 10 minutes; via range selector and single-turn control

Fail-Safe:

Alarm condition on power failure

Electrical Connections:

(2) 3/4" NPT conduit connection; (2) cable glands suitable of sealing cords with diameter of 0.25 in (6.4 mm) to 0.48 in (12.2 mm) are provided

Indicators:

Tri-Color LED indicating: "Low"= Yellow;
"OK" = Green; "High" = Red
SIG>LEVEL = Yellow
ALARM LED = Red

Housing:

NEMA 4, IP65; Designed for general purpose locations

Cover Lock :

1/16" Allen-Wrench

PROBE:

Architecture:

Integrally or remote mounted to electronics housing

Mounting:

Quick-Disconnect fitting with ferrule, clamp and gasket

Pressure:

30 psi (2 bar) maximum

Insulator Material:

PFA, extended length

Probe:

3/8" diameter, 316 SS

Probe Length:

3 in (76 mm), 6 in (152 mm), 12 in (305 mm) standard; consult factory for custom lengths

Listings/Approvals:

CE Mark

 

 
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 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.



 
Part Numbers / Product Configurations
Monitor Logo
Part # > Product Configuration
18-8311-0 > DUSTALARM,115VAC,O/L,CSL<12" PRB
18-8311-1 > DUSTALARM,115VAC,O/L,3" PRB
18-8311-2 > DUSTALARM,115VAC,O/L,6" PRB
18-8311-3 > DUSTALARM,115VAC,O/L,12" PRB
18-8311-9 > DUSTALARM,115VAC,O/L,CSL>12" PRB
18-8315-0 > DUSTALARM,RMT,115VAC,O/L,CSL<12" PR
18-8315-1 > DUSTALARM,RMT,115VAC,O/L,3" PROBE
18-8315-2 > DUSTALARM,RMT,115VAC,O/L,6" PROBE
18-8315-3 > DUSTALARM,RMT,115VAC,O/L,12" PROBE
18-8315-9 > DUSTALARM,RMT,115VAC,O/L,CSL>12" PR
18-8321-0 > DUSTALARM,230VAC,O/L,CSL<12" PRB
18-8321-1 > DUSTALARM,230VAC,O/L,3" PRB
18-8321-2 > DUSTALARM,230VAC,O/L,6" PRB
18-8321-3 > DUSTALARM,230VAC,O/L,12" PRB
18-8321-9 > DUSTALARM,230VAC,O/L,CSL>12" PRB
18-8325-1 > DUSTALARM,RMT,230VAC,O/L,3"PROBE
18-8331-0 > DUSTALARM,10-32VDC,O/L,CLS<12" PRB
18-8331-1 > DUSTALARM,10-32VDC,O/L,3" PRB
18-8331-2 > DUSTALARM,10-32VDC,O/L,6" PRB
18-8331-3 > DUSTALARM,10-32VDC,O/L,12" PRB
18-8331-9 > DUSTALARM,10-32VDC,O/L,CSL>12" PRB
18-8335-9 > DUSTALARM,RMT,LVDC,O/L,CSL>12"PR
 

Last Rev.: March 27, 2015

 
 
 
QuantiMassTM
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).

Versions:
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.

Click here for more information on the QuantiMass
or contact Monitor Technologies LLC at
Tel.: 800-601-6319 in the USA and
Tel.: 630-365-9403 worldwide.
 
>>Download QuantiMass Ultra Bulletin

>>Download QuantiMass PRO Bulletin


>>Download QuantiMass Application Questionnaire (Excel file)

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