DUST ALARM 40 - Filter damage monitoring

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DUST ALARM 40 -
Filter damage monitoring

DUST ALARM 40 was specially developed to monitor clean sides after filters reliable and without time delay regarding filter breaks

  • immediate detection of filter damages
  • to avoid process-induced DustEx-areas
  • detects all dust types
  • usable in clean gas and dust channels
  • very simple and fast retrofitting
  • simple, icon-driven menu
  • 2 independent alarm set points
  • expandable to 4 ... 20 mA output (trend signal)

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Use

The DUST ALARM 40 was specially developed to monitor clean sides after filters reliable and without time delay regarding filter breaks. The sensor can be used in metallic channels where dust particles are to be detected in the gas stream at dust concentrations of 1 mg/m3 up to 500 mg/m3.

The DUST ALARM 40 can also be used in hazardous areas (dust zone 2/ gas zone 2).

Function

DUST ALARM 40 uses the electrodynamic measurement principle.
As soon as particles pass or strike the probe, a charge transfer takes place.
From this, a measuring signal is generated which triggers a switching contact at a given limit value or is available as a current output.

The DUST ALARM 40 consists of a sensor and a control unit. The simple, icon-driven menu provides users with a language-free setup and system overview.
With a 2,8” color display the correct function of the filter or an exceeding of the limit value are displayed visually during operation.
In addition, the DUST ALARM 40 comes standard with two independent relay outputs and an optional 4 … 20 mA output.

Technical Data

Sensor Stack diameter up to 4 m
  Flue gas velocity > 4 m/s
  Dust level response < 1 to 500 mg/m³ (application dependent)
  Ambient temperature -20 °C to +50 °C
  Protection rating IP 65
  Weight 900 g
  Power supply voltage 24 V DC (from the control unit)
  Rod length 100, 300, 600 or 1000 mm
  Rod material stainless steel
  Sensor connection ½" BSP
Control unit Type DUST ALARM 40 Controller
  Display Full-colour, anti-glare 2.8" LCD (4:3 ratio)
  Weight 1.2 kg
  Outputs (standard) 2 x alarm relays (0.5 A DC @ 24 V)
  Outputs (optional) 1 x 4 ... 20 mA output (250 Ω, isolated)
  Ambient temperature -20 °C to +50 °C
  Enclosure protection rating IP 66
  Power supply voltage 80 - 230 V AC (50/60 Hz)
  Cable entries 3 x M16 cable glands
1 x M20 cable gland
(for mains power cable)
Sensor options Flue gas temperature -20 °C to +250 °C
  Sensor connection ½" NPT
  Air purge ½" air purge unit, BSP
½" air purge unit, NPT
air filter + regulator assembly for purge fitting
  Outputs 4 ... 20 mA output
  Hazardous zones ATEX Zone 2 (gas) and 22 (dust)
 
 

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