Infrared photometer PIR3502

The Multiwave photometer PIR3502 is designed for the IR (infrared) and NIR (near infrared) spectral regions. The ABB Multiwave photometers provide continuous measurements in complex streams which allow for fast reactions to process changes. The fast analysis provides optimum control of a process and improves its safe operation. Measurements can be made in liquid or vapor streams.


Performance Specifications

The PIR3502 Multiwave process photometer provides continuous measurements of vapor or liquid samples, in simple or complex process streams, for process control, product quality assurance, safety, catalyst protection and area monitoring.

The filter wheel of the photometer utilizes up to eight wavelengths, increasing the number of measurement solutions. Because it uses multiple wavelengths, the photometer can compensate for many types of interference and handle multiple component applications.

The PIR3502 Multiwave photometer provides the following:

  • VistaNET and VistaSTAR Connectivity.
  • Multiple interference compensation capability
  • Fiber optic option for NIR applications
  • Operates in IR and NIR
  • Measures Vapor or Liquid samples
  • Multiple component samples
  • Continuous measurements


Multiwave Photometer Solutions The ABB PIR3502 process photometers leading applications include:


  • Isocyanate in chloroaromatic solvent Ambient air monitoring
  • Multicomponent monomers in polymer process
  • With Infrared (IR) Spectral Regions: 2.50 - 14.5 um

Near Infrared

  • Measurement of Hydrogenic Compounds (C-H, N-H, O-H)
  • Water in Organics, such as Ethylene Dichloride (EDC)
  • Caustic in Acid Gas Scrubbers
  • With Near Infrared (NIR) Spectral Regions: 800 - 2500 nm


Performance Specifications 

Precision:±1% FS(Full Scale)
Noise:± 1 % of full scale at 0.02 absorption units ± 0.5 % of full scale at 0.20 absorption units
Linearity:Standard ± 2 % of full scale
Zero Drift:± 0.5 % of full scale per day for IR;

Operating Specifications

Ambient Temperature Range:32° to 113°F (0--45°C)
Sample Pressure:0--500 PSIG (0--34 bar)
Voltage Input Variation:10 % fluctuation without causing an output variation of 0.05 % of full scale
Electrical Power to Analyzer:100/115/220/230 VAC, 45--66 HZ; 150W,
Maximum power consumption :600W With Electric Heat

General Installation

Protect the instrument from direct sunlight and rain at operating temperature between 32°--113° F (0--45°C)


Weight:approximately 80 lbs (36.28 kg)
Height:13.5 inches (342.9 mm)
Depth:10.5 inches (266.7 mm)
Width:10 inches (254 mm) per module
Overall Length:(based on cell pathlength)
Minimum:26.8 inches (681.4 mm) for 0.5 to 16 mm cell
Maximum:65.5 inches (1665 mm) for 1 meter cell

Area Classification

Standard:NEC Class 1, Division 2, Group B, C, D
Enclosure Purge:NEC Class 1, Group B, C, D, Division 1, with "Y" Purge CENELEC Zone 1, IIB + H2


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