Starting at $3,800.00

Not in stock. Usually ships in 3-4 weeks [?]

Need Help? Call a Calibration Engineer 1-800-884-4967

We're open Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET


  • Single-range measurement options
    • 0-50; 0-100; 0-1,000; 0-5,000; or 0-10,000 ppm
  • Optional three-range measurements
    • 0-1/10/100 ppm
    • 0-5/50/500 ppm
    • 0-10/100/1,000 ppm
    • 0-50/500/5,000 ppm
    • 0-100/1,000/10,000 ppm
  • ±1% of full scale accuracy
  • 90% of full scale in less than 10 seconds response time
  • 4-20 mADC and 0-2 VDC outputs
  • 40 to 104°F (5 to 40°C) operating temperature range
  • 0.4in (10.2mm) high, 4-1/2-digit LCD
  • Factory calibration
  • 2-year electronics and 1-year sensor warranty
  • NEMA 1 (IP 30) standard configuration
  • Optional watertight enclosure rated NEMA 4X (IP 66)
  • Optional explosion-proof enclosure rated NEMA 7
    • Class I, Groups B, C, D, Div 1
    • Class II, Groups E, F, G
    • Class III

The AOI Series 3000 oxygen analyzer is a microprocessor-controlled monitor that measures trace oxygen, either in a single range or optional three-range configuration. Measurements range from under 1 ppm to 10,000 ppm oxygen. The analyzer has built-in visual and audible alarms. Three oxygen alarm relays and one status alarm relay are user-configurable for fail-safe operation.

The Series 3000's sealed sensor eliminates the need for periodic electrolyte maintenance. The sensor is not position-sensitive and does not require manual adjustment based on changes in the molecular weights of sample gases like helium and hydrogen. The output from the sensor is both linear and temperature compensated to provide optimum performance. The sensor is installed in a high-integrity, leak-tested metal housing equipped with 1/4″ stainless steel compression fittings on both the sample gas inlet and outlet. Manual isolation valves are included at no additional charge.

A CO2-tolerant trace oxygen sensor is available as an option. The CO2-resistant sensor is capable of providing accurate oxygen readings in gases containing up to 100% carbon dioxide without shortening the life of the sensor.

The monitor affords maximum flexibility to meet the increasing demands of the industrial, commercial, and educational markets. It is available in a wide number of optional mechanical configurations from watertight (NEMA 4) to explosion proof (NEMA 7). It can also be configured with an optional remote sensor that may be placed up to 1,000 feet (300 meters) from the electronics.

AOI 395S Sample Filter
High-capacity filter with 316 stainless steel (SS) body and 316 SS sintered filter element capable of filtering particles >5 microns
AOI AFM20 Coalescing Filter
Aluminum housing recommended for samples containing a very light mist and particles >30 microns
AOI AFM-FE Filter Elements
Spare filter elements for the AFM20 coalescing filter
AOI SS-FBX Spare Filter Elements
316 stainless steel filter elements for the SS-4TF-2 filter
AOI 3SEN Replacement Sensor
Replacement sensor for Series 3000 oxygen analyzer
AOI 3-SOL-E Solenoid Valves
Pair of AC valves installed on sample gas inlet and outlet that can be programmed to automatically isolate oxygen sensor when not in use
AOI 3SEN-CO2 Sensor
CO2-resistant trace oxygen replacement sensor
AOI SS-4TF-2 Sample Filter
High-capacity sample filter recommended for when particles are >5 microns, 316SS body and filter element with 1/4in compression fittings
AOI PR-100 Pressure Regulator
Aluminum body and stainless steel needle valve, maximum pressure input of 100psig (7.03kg/cm²)
AOI PMP-220 Sample Pump
For use in applications with sample pressure from 12 to 14.9 psia (827 to 1027 mbar), 220VAC
AOI PMP-24 Sample Pump
For use in applications with sample pressure from 12 to 14.9 psia (827 to 1027 mbar), 24 VDC
AOI PR-3000 Pressure Regulator
Stainless steel with a 3,000psig (211kg/cm²) inlet capacity and adjustable outlet pressure range of 0 to 5psig (0 to 0.35kg/cm²)
One-piece acrylic flow meter with flow control adjustment, 1/4in quick connects on input and output
AOI FLM-QC-QC Flowmeter
One-piece acrylic flow meter without flow control adjustment, 1/4in quick connects on input and output
AOI NV-SS-2C-2C Flow Control Valve
Mounted on the sample inlet and made of stainless steel