Model 430

Compact Ozone Monitor



Ranges 0 - 100 ppb (min), 0-20,000 ppb (max)
(user -selectable)
Measurement Units ppb, ppm,  (user- selectable)
Zero Noise < 1 ppb (RMS)
Span Noise < 0.5% of reading (RMS) above 100 ppb
Lower Detectable Limit < 2  ppb
Zero Drift < 1 ppb/24 hours
Span Drift < 1% of full scale/24 hours
Lag Time <20 seconds
Rise/Fall Time < 15 seconds to 95%
Linearity 1% of full scale
Precision < 0.5 ppb or 0.5% of reading above 100 ppb​
Sample Flow Rate0.8 L/min +/-10%
Typical Power Consumption 12VDC, 9W
Analog Output Ranges 0 - 5V
Analog Output Resolution 16-Bit Resolution 
Internal Data Storage Capacity10,000 lines (1 hr avg = 1.1 yr)
Included I/O 1 x RS-232
1 x 0-5V analog output
5 x 0-5V analog input
1 x SD card slot
Operating Temperature Range 5 - 40ºC (with US EPA Approval)
Dimensions (HxWxD) 4.2" x 7.1 ” x 10.2” (107 x 180 x 597 mm)
​Weight​5.2 lbs (2.4 kg)
Humidity Range  0-95% RH non-condensing

Specifications are subject to change without notice.
All specifications are based on constant conditions.​

US EPA Federal Equivalent Method EQOA - 1015-229



  • Proven UV Absorption bench used in our popular line of Industrial Ozone products.
  • Highest quality of construction.
  • Rugged and lightweight ABS polycarbonate chassis with handle.
  • Well suited for portable, low power monitoring applications.
  • Wide operating range.



​The following table provides a list of items that  need regular maintenance to ensure your product remains in good working condition.






Recommended at 10,000 hours or when the flow is less than 0.7 lpm.



Every 6 months *

Measurement Bench:

UV Lamp


As needed, when REF value is out of range (800-1150 mV).


As needed, when REF can no longer be adjusted within range.

Bench Module Valve


Every 2 years.

*Some environments may require greater frequency; recommend checking monthly until determined.


08311C - MANUAL, MODEL 430, Operation.pdf430 Manual603 KB
ESD Fundamentals - 04786.pdfFundamentals of Electro-Static Discharge (ESD)216 KB
SAL000076E- Environmental Instruments Overview.pdfEnvironmental Instruments Overview313 KB
SAL000089F-CN 430.pdf430规格 (Chinese Specification)938 KB
SAL000089G - 430.pdf430 Specification457 KB
SAN19-0004A - TECHNOTE Portable Ozone Monitoring with the Model 430.pdfPortable Ozone Monitoring with the Model 430171 KB



Teledyne API, a recognized leader in Ozone measurements, is pleased to offer the Model 430 O3 Monitor. The 430 is a compact instrument that uses the proven UV-absorption principle. The small footprint and robust design make it ideal for a variety of applications where portability and accuracy are both necessary.