Broken Filter Bag Detector PM-251


Broken Filter Bag Detector PM-251

Timely Detection of Broken Bags in a Bag House Proven Technology, Time-Tested and Economically Priced Detector. It measures the Triboelectric effect and determines when particle Emissions exceed the acceptable levels.

  • Field-Proven Tribo-electric Technology ensures reliability.
  • Direct sensing method; Actual Particulate measurement.
  • Adaptable, suitable for virtually all dust collectors.
  • Damping system to prevent False Alarms.
  • Adjustable Sensitivity, Alarm Level and Time Delay to suit wide variety of Powders and Bulk Solids.
  • Robust & Reliable.
  • Easy installation. Low maintenance
  • Wide range of duct sizes from 250 mm to 2 m.
  • Integral Assembly of Sensor and Electronics in Rugged Housing.

Broken Bag Detectors finds applications in a wide variety of industries where Detection and control of Dust levels are critical for the Safety, Maintenance, Equipment operation, Plant Efficiency and/or the Environment. It Provides Reliable and Economical detection of leaks and Filter Failures in Powder and Bulk Solids industries Broken Bag Detectors has LED visual indications and a relay output to maximize its user-friendliness and automation capabilities. It incorporates a specially designed adjustable damping system that increases its response time and prevents False Alarms.

For Process Flow Application it is a reliable flow / no-flow detector to monitor Flow disruptions of dry solids in bulk handling & pneumatic conveying applications.


Technique Tribo – Electric charge transfer
Sensitivity Adjustable
Operating Temp (Ambient) -20 to 70 °C
Flue Gas Temperature 0-250 °C (upto 1000 °C Opt)
Ranges 1-1,000 mg/m3
Response Time Instantaneous
Duct Width 50 mm to 2.2 m
Positioning 90 °C to Duct Wall
Communications Path Length Up to 1,000 meters
Socket Single 1 Flat Flanged Fitting
Mounting Details Dia 40 mm, Quick Disconnect Fitting With Clamp And Gasket
Construction 316 Grade Stainless Steel
Sensor Length 25, 100, 200, 500, 1000 mm or custmised
Insulation PTFE (T Model – Glass Ceramic)
Sensor Diameter 10 mm
Power Supply 24 V DC
Output 4-20 mA
Alarms Green – Normal
Yellow – Warning
Red – High Alarm
Alarm Delay Adjustable up to 10min
Averaging Time Programmable Up to One Hour
Output – Remote Alarm SPDT Relay 24 V DC 5 mA
Power Supply 110/220 Volts 50 Hz Ac or 24 V DC

Note : Specifications and Features will vary with application. The above are established and validated during design, but are not to be construed as test criteria for every product. Due to hnl’s commitment to research, design and product improvement, specifications are subject to change without notice.


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