The device to measure the oxygen concentration by sampling the atmosphere such as nitrogen reflow equipment.

No reference gas required
Digital output


  • ●Requires no calibration with reference gas before using the analyzer.
  • ●Features longer sensor service life than other galvanic battery type sensors.
  • ●A PC communication output port (RS-232C) as a standard feature.

product specification

Item Specification
Model Name OAS-1
Measurement range OAS-1-1 50ppm - 1000ppm or 500ppm - 1% (Selectable on request)
OAS-1-2 50ppm - 1%
Measurement accuracy OAS-1-1 50ppm - 1000ppm +/-50ppm 500ppm - 1% +/-500ppm
OAS-1-2 50ppm - 1000ppm +/-50ppm 1000ppm - 1% +/-500ppm
Response 90 seconds (90% response value)
Warm-up time Approx. 5minutes
('---' is displayed for 4 minutes and blinks for 1 minute.)
Gas temperature +5 - 50C
Gas humidity 0 - 85% R.H.
Ext. output Outputs digital signals at 1-minute interval (thru. RS-232C) 9600bps, non parity, stop bit : 1
Source voltage 100VAC, 0.5A or less
Outer Dimension 170(W) x 140(H) x 315(D) (mm)
Weight Approx. 3kg
Sensor life Approx. 3years (depending on the use environments)
  • * The above specifications are subject to change without notice.