Model 3110XL

Portable Oxygen Analyzer​​​


The Model 3110  represents the new generation of portable trace and percent oxygen analysis capabilities. It combines a rugged, portable analyzer with the high reliability of trace and percent level sensors. This ensures highly accurate ppm/ percent oxygen readings in a variety of background gases (including hydrocarbons). In addition, the microprocessor-based electronics provide accurate, high resolution readings and easy-to-use features.​

Build for Reliability and Performance

The analyzer comes standard with a heavy-duty plastic carrying case with foam interior and includes quick disconnect fittings to take measurements without hassle. It can be equipped with an external sample system and has batteries that supply at least 100 hours of continuous power to the analyzer, with a low-battery indicator LED.

Features and Benefits

  • Intrinsically safe, FM/FMc or ATEX approved*

  • Digital meter readout

  • 0-1 VDC output, data logging capabilities

  • Ideal for measuring O2 in natural gases and a variety of other background gases

  • Long-life, maintenance-free, Micro-Fuel Cell oxygen sensor

  • Universal AC charger

*third-party approved only for O2 levels below 20.9%​


  • Real-time data-logging capabilities with digital output that can be downloaded directly to a PC

  • Stainless steel quick disconnect gas fittings

  • Sample system consisting of coalescing filter, needle valve, flow meter, fittings and tubing suitable for trace/percent O2 analysis

  • H2S and sulfur resistant sensor​


  • Ranges: 0-10 ppm to 0-10,000 ppm with 0-25% over-range

  • Analyzer is intrinsically safe, FM-approved for Class I Div 1 Groups D and ATEX-approved for Zone 0 (ia) IIC*

  • Sensor: Micro-fuel Cell Class B-2C

  • Calibration: In ambient air or with a certified span gas

  • System power requirements: AC power for battery recharge circuit of two current limited rechargeable NiCad batteries,

  • 0-1V analog output​​

  • Digital meter readout

  • Steel quick-disconnect fittings with nylon cell block; mating set (3) of male fittings (vent, sample, calibration); calibration hose

  • Carrying case (P/N: E834) - black, durable plastic, foam interior, or (P/N: E836) larger case for a unit with a sample system

*third-party approved only for O2 levels below 20.9%


​3110:        0-10 ppm to 0-25% O2
3110XL:    0-2 ppm to 0-25% O2
3110P:      0-1% to 0-25% O2
​Response Time
​Trace ranges (with B-2C sensor):     < 60 seconds
Percent ranges (with B-1 sensor):   < 7 seconds
​32° to 104°F (0° to 40°C)
​± 1% at constant temperature
​Sensor Type
​Micro-Fuel Cell
​System Power
​NiCad batteries, AC adapter included for battery charging
10/220 VAC 50/60 Hz, 0.25A
​6 lbs. (2.71 kg)
​Factory Mutual (FM/FMc), intrinsically safe, Class 1, Div 1 Groups A-D T6
ATEX intrinsically safe, Ex ia IIC T3
CE marked
​Ni-Cad, >100 hours per charge, 5 year expected life

*third-party approved only for O2 levels below 20.9%


  • Air separation and liquefaction

  • Pure gaseous hydrocarbon stream monitoring

  • Semiconductor manufacturing

  • Protective atmosphere blanketing of primary liquid feedstocks​ and flammable liquids

  • Process analysis of gaseous monomers - vinyl chloride, propylene, butadiene, isoprene or ethylene

  • Gas purity certification

  • Glove box or pipeline leak detection

  • Natural gas treatment and transmission

  • Catalyst protection

  • Inert gas welding of exotic metals

  • Wave and re-flow soldering

  • Heat treating and bright annealing

  • Nuclear fuel processing and isotope separation

  • Analysis of chemical reactions

  • Head space gas analysis

  • Crystal growth

  • Plastics manufacturing