- Model QAL260 - QAL1 Certified Particulate Analyzer



The QAL 260 series is suitable for measuring dust concentrations in Combustion, Incineration and other industrial stacks and is compliant with EN 14181. Having a 0-15 mg/m³ certification range, the QAL 260 sensor can be used at low or high dust levels. Due to dynamic ranging, the sensor is also suitable for much higher dust levels found in Power, Cement and Metals smelting processes.

  • ProScatter Backscatter sensor technology with superior minimum detection
  • Mounted on one side of the stack with no secondary light absorber or beam dump requirement: non-intrusive
  • Certified to 15 mg/m³ for processes with low typical emission limits
  • Manual and remote Zero and Span (reference) checks available to ensure optimal instrument performance and to comply with EN 13284/QAL1
  • Automatic Functionality Check – fully interrogates the optical system
  • Purge Flow Fail Sensor option with inbuilt automatic optical shield activation
  • PC-ME Dust Tools PC Software option to provide secure and powerful emissions reporting, real-time and historical data analysis

The QAL 260 is used to monitor emissions from the following types of applications:

  • Power Plant and Combustion Processes including:
    • Coal fired power stations
    • Gas/Oil fired power stations
    • Refinery boilers
    • Biomass power plant
  • Chemical, Mineral and Metal processes where stack size greater than 2m
  • Non-condensing/dry flue gases

Conveniently mounted on one side of the stack, with no secondary light absorber or beam dump requirement, the QAL 260 series is non-intrusive and has no measurement components protruding into the stack, so process gases are not disturbed. As critical optical components remain outside the stack, the risk of contamination is reduced. Contamination reduction is managed by an optical shield*, which is automatically rotated when the Purge air flow falls or greatly reduces. In addition, an optional Flue gas blocker can be fitted to ensure any flue gases do not escape when the unit is opened for auditing or maintenance purposes.

As an alternative to opacity monitors, the QAL 260 offers a more reliable PM dust measurement as it is calibrated as a PM monitor (and not as a smoke or opacity monitor), where emissions are to be reported in mg/m3 and early indication of increased dust emissions is required at lower dust concentrations.

The sensor is available as a standalone version, the compact QAL 260c or the QAL 260s which is combined with a PCME Control Unit to provide either a standard single-channel system or a multi-channel PRO system for an extensible network (up to 32 sensors). Using a multiple-sensor system based on a ProController allows other sensors from the PCME range to be added (such as Gas Flow, Temperature and Pressure sensors) for Mass Emissions Monitoring, Bagfilter Management (using PCME’s Baghouse Performance sensors) or as part of a CEM system including Gas Analysers.

PCME’s ProScatter™ Backscatter technology measures the amount of light scattered back from particles in the stack illuminated by a modulated laser.

Sensor (260c variant)

  • 316 Stainless Steel
  • IP65 Protection Rating
  • Power: 100 – 240V AC or 24V DC
  • Automatic Functionality Check
  • Air Purge Flow Sensor Option including optical shield for contamination minimisation
  • Flue Gas Temperature (at monitoring point):
  • 0 250oC, option up to 400oC
  • Flue Gas Blocker (shutter) option

260s (Sensor network variant) includes PCME Standard or PRO Control Units

PRO Control Unit (ProController): 1 – 32 Channels
IP65 Protection Rating
Power: 85 – 265V AC

Standard I/O:

  • 2x RS-485 (Modbus RTU)
  • 4x Relay outputs (3A @ 250V AC/24V DC, configurable)
  • 4x 4-20mA outputs
  • 4x Digital inputs (voltage free)
  • 2x 4-20mA inputs

Advanced I/O:

  • Ethernet (100Mb/s)
  • USB 2.0

Optional Filter Display Module for visual tracking of multi-chamber baghouse cleaning cycles
Standard Control Unit (Interface Module)
1 Channel
IP65 Protection Rating
Power: 100-240V AC

Standard I/O:

  • 1x RS-485 (Modbus RTU)
  • 2x Relay outputs (2A @ 250V configurable)
  • 1x 4-20mA output (isolated 500 Ω)
  • 2x Digital inputs (for Plant OFF indication)

  • QAL 1 Certified to EN 14181 & EN 13284

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