Vaisala SPECTRACAP® Oxygen Transmitter OMT355

 

 

 

 

 

Overview

 
  • An optical, diode laser based oxygen analyzer for industrial gas measurements.
  • Minimizes need for sample conditioning equipment.
  • In-situ probe or sampling cell options.
  • Tolerates aggressive chemicals.
  • Tolerates excessive amounts of moisture even in liquid form.
  • Low maintenance.
  • Diagnostic output for preventive maintenance.
  • Heated optical surfaces to prevent condensation

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    Technical Specifications

    		 

    Performance

    ​ ​Measurement range ​0 ... 100 % O2
    ​ ​Accuracy (including noise,
    linearity, and repeatability)    		 ​
    ±0.2 % O2
    ​ ​Temperature dependence
    over T range    		 ​
    ±2 % of reading
    ​ ​Stability ​±1 % of reading/year
    ​ ​Zero drift ​±0.1 % O2/year
    ​ ​Response time of
    measurement    		 ​
    3 s
    ​ Diffusion limited response in
          still air    		 ​
    T63/T90
    ​      without filters ​10 s / 20 s
    ​ ​     with stainless steel mesh filter ​10 s / 25 s
    ​ ​     with stainless steel mesh        and PTFE filters ​
    30 s / 70 s

    Operating environment

    ​ ​Operating temperature range ​
    ​ ​     for probe (in-line installation) ​-20 ... +80 °C
    ​ ​     for electronics (housing) ​-40 ... +60 °C
    ​ ​     for transmitter
         (ambient gas measurement)    		 ​
    -20 ... +60 °C
    ​ ​Operating pressure range ​0.8 ... 1.4 bar
    ​ ​Maximum pressure range for
    probe    		 ​up to 10 bar

    Inputs and outputs

    ​ ​Power supply ​11 … 36 VDC
    ​ ​     input range ​
    ​ ​Power consumption ​
    ​ ​     maximum ​6 W
    ​ ​     typical ​3 W
    ​ ​Analog output ​0/4 … 20 mA, sourcing
    ​ ​     maximum load ​500 Ω
    ​ ​Serial output
    (2-wire non-isolated)    		 ​
    RS-485
    ​ ​Alarm/control relay ​30 VAC/60 VDC

    Mechanics

    ​ ​Housing material ​G-AlSi10 Mg (DIN 1725)
    ​ ​Probe material ​AISI 316
    ​ ​Housing classification ​IP66
    ​ ​Weight ​2.2 kg
    ​ ​Mounting flance diameter
         Can be fitted to standard
         flanges. Minimum sizes:
         DIN (2527B) DN50 and
         (150) 2.5"    		 ​96 mm
    ​ ​Cable bushing ​
    ​ ​Stainless steel mesh filter ​Cable gland M20 x 1.5
    openings Ø 310     μm
    ​ ​Wetted materials
    AISI 316, EPDM or Kalrez    ®
    (optional), PTFE (optional), SiN, MgF    2    		 ​

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