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4500 MkIII

In-situ cross-duct TDLAS Analyser

4500 MkIII is the most accurate and reliable continuous opacity monitor available, combining AMETEK Land’s ground-breaking innovation and simple design for precise, problem-free operation.

Unmatched, class-leading accuracy ensures compliance limits for dust emissions and stack opacity are met with confidence. This avoids the risk of regulator fines while lowering costs through operational efficiencies.

The 4500 MkIII employs a highly homogenous LED light source to minimize sensitivity to optical misalignment. The multi-prism retro-reflector reduces thermal drift for the lowest possible detection limit. Together with a flood LED to minimize electronic drift, these patented technologies provide you highly stable, highly accurate results.

Fitting stack diameters of 0.3m-15m (1 ft-50ft), 4500 MkIII is suitable for the continuous monitoring of dust and opacity in boilers, heaters, furnaces and other combustion applications in the power generation, hydrocarbon processing, industrial boilers, and steel industries.

Have questions? Call +61 2 9622 6327

The built-in menu display is intuitive and simple to use, with simultaneous text and icon prompts. There’s no need to take a laptop or handheld terminal to the installation location, making setup and operation hassle-free.

4500 MkIII has all the compatible accessories you need to tailor it to your process. Options include a control room unit, auxiliary functions unit, fail-safe shutters and calibration accessories, as well as a range of mountings and adaptors for existing fittings.

  • Biomass
  • Cement
  • Chemical Processing
  • Emissions Monitoring
  • Iron to Steel
  • Lime
  • Paper
  • Waste
Measuring TechniqueDouble pass transmissometry
Operating Wavelength520 ± 20 nm
Light SourcePulsed High Intensity LED
Measurement RangeOpacity 0-10 % to 0-100 %; Optical Density 0 – 0.1 to 0-3.0;
Dust Density 0-15 to 0-1000 mg/m3 (at 5 m pathlength)
Calibration Error1.5 % opacity
Drift (long term)< 0.3 % opacity / month
Thermal Stability0.6 % opacity / 22 ° C ambient change
Angle of Projection< 2 °
Angle of View< 2 °
Response Time≤10 s to 95 %
AveragingSelectable from 10 s to 24 hr (1 s increment)
Pathlength0.5 to 10 m / 20 in to 32 ft (extended pathlengths to 15 m available)
CalibrationAutomatic zero and upscale check (selectable period 1 to 24 hr in 1 hr increments)
Zero CorrectionAutomatic correction for zero drift
Control Panel Display128 x 64 pixel reflective backlit LCD
Control Panel Keypad4 keys for data input
Control Panel IndicatorsPower, System OK, Alarm, Calibration
Operating Temperature-40 to 55 °C / -40 to 131 °F
Max. Flue Gas Temperature600 °C / 1112 °F
Max. Flange Temperature200 °C / 392 °F
Flue Gas Water ContentNot sensitive to water vapor. Condensed water must not be present in the measurement path.
Electrical SafetyIEC / EN 61010-2
EMCEN 50 081 & EN50 082
SealingIP65 / NEMA4X
Modbus InterfaceRS485; Opacity, Optical Density, Dust Density and Status information available
Analog OutputsIsolated 4 to 20 mA Configurable as Opacity, Optical Density, Dust Density
Relay OutputsSystem OK, Calibration, Alarm
Relay Rating1 A @ 24 Vdc
Power Supply24 Vdc nominal (18 to 30 Vdc), 0.3 A nominal (3 A startup)
Transceiver Dimensions (Hx W x D)191 x 291 x 413 mm / 7.5 x 7.9 x 16.3 in
Retro-reflector Dimensions (H x W x D)101 x 201 x 237 mm / 7.5 x 7.9 x 9.3 in
Transceiver Weight6 kg / 13.2 lbs.
Retro-reflector Weight3 kg / 6.6 lbs.
EnclosureCast Aluminum, epoxy coated
Accessories Fail-safe Shutters, Blowers, Adapter Flanges, Remote Control Units, Additional Outputs Available
Approvals QAL 1, EN 15267, EN 13284-2
Performance Specifications ASTM D6216, US EPA PS-1, PS-11, Procedure 3

The 4500 MkIII achieves the highest possible specification for the fundamental performance parameters for a compliance opacity monitor, as defined by the internationally-recognised ASTM D6216 Standard. Its performance has been independently verified, meeting QAL 1 requirements according to EN 15267-3.


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