The Models O2C, O2D and O2DAL are general purpose oxygen analyzers for research, air separation monitoring, and industrial monitoring applications. Designed to measure oxygen in a range of 5-100% accurately and in the presence of other gasses such as including Ar, He, H2, CO2 and non-condensing H2O vapors. The Model O2C features an internal pressure regulator to connection to 1-75 psig source and the Model O2D features a sampling pump for flow control. The Model O2DAL features a high flow micro pump for low pressure operation from 1200 to 55mbar (0-60,000 feet altitude).

Now you can control oxygen process gas, combustion oxygen mixtures, or nitrogen purge gas with a response time of less than 1 second.

Here is a truly digital oxygen analyzer with analog and digital interfaces for control, display, and data-logging of oxygen process parameters

The Oxigraf O2iL may be the process controller you need.

• Fast response
• Reliable laser diode technology
• Pressure and temperature correction
• Remote display and maintenance
• Insensitive to movement
• Coded password access
• Sample flow monitor

The Model O2L is a general purpose oxygen analyzer for research, fuel and combustion system monitoring, food processing and packaging, pharmaceutical manufacturing, automotive engine analysis, and purge verification applications. The Model O2L is designed to measure oxygen in a range of 0-100% levels with resolution of 0.01 % from 0-10% and 0.1% from 10-100%. The unit operates in LN (low noise) mode for smooth readings and the measurements are made independent of sample pressure, gas temperature and other gases including CO2 and H2O. Gases other than oxygen will, in most cases not affect the measurement except for their dilution effect on the gas mixture. The Model O2L features an easy to use and feature bright LED displays, touch panel controls, easy calibration, and has a sampling pump and internal flow meter for monitoring flow in the system. A terminal strip on the rear panel is included for analog relay alarm outputs , 4-20 mA outputs, and an analog 0-1.0 VDC output is on a BNC connector. A DB-9 connector RS-232 digital output provides digital serial communications and is compatible with Oxisoft software. The unit has CPC O-ring quick connect inlet fittings for industrial applications.

Overlay and Sparge Gas Controller for Bioreactors.

The Model O2MIX gas mixer measures the oxygen and CO2 concentration in a gas sample inside instrument and uses this as feedback to control three (3) proportional valves to blend gasses from the three (3) inputs to a single output. The product uses feedback from actual gas measurements as a control point and different mixture and blends of gasses can be used to feed three (3) inputs for mixing. In normal operation the O2MIX is designed to accept Oxygen, Nitrogen (or Compressed “Air”) and CO2 as inputs, and a single blended output of a programmed mixture is produced by the unit to feed a Bioreactor.

• Accurately mixes O2 and/or CO2 with air or nitrogen by measuring the gas concentration rather than by estimating mixtures from flow measurements.
• Accurately controls flow independently.
• O2 Range: 21 to 75%. Accuracy: + - 0.3% using tunable diode laser absorption.
• CO2 Range: 0 to 10%. Accuracy: + - 0.2% using non-dispersive infrared.
• Flow: 100 to 600 ml/min.

The O2MIX has internal pressure switches which provide ALARM control to warn the user if gas pressure is below operating levels and to warn of supply gas exhaustion. Measured oxygen concentration in percent volume fraction is displayed on a front panel alphanumeric VFD display. Two lines of 16 characters show numeric data and the parameter units or other annunciation. The instrument mode is controlled via a front panel keypad array. A back panel power jack and 9-pin RS232 connector provides the physical interface for power input, and serial link connections.

The model O2Mix has CPC O-Ring quick connect gas sample fittings and the inputs and output for easy connection and setup.

The Next Generation of the Oxigraf O2iM is the UltraFlow Uno and Duo models. 

Four (4) port Oxygen Deficiency Monitor with single high flow pump and back up low flow sample pump (UltraFlow Uno) or (2) high flow pumps (UltraFlow Duo). Internal multiplexers to sample up to four (4) line simultaneously. 

You want a rock-solid and immediate oxygen alarm for concentration less than 19.5% in the event of a cryogenic spill leading to rapid displacement of breathing air.

You also want an end to frequent recalibration or replacement of oxygen sensors, high maintenance of sampling systems, false alarms, and failure to alarm.

Bioreactor Off-Gas Monitoring of O2 and CO2

Based on the Oxigraf Model O2Cap Oxygen and CO2 analyzer, the O2Bio is specifically designed to provide gas monitoring of Bioreactor headspace and off-gas streams. The unit will measure continuously from an off-gas vent or periodically via a gas sample valve to take small 10-15ml samples from the bioreactor headspace via keypad or digital interface control.

The O2Bio integrates an Oxigraf tunable diode laser (TDL) oxygen sensor and a non-dispersive infrared (NDIR) CO2 sensor with a pump regulated gas sampling system. The analyzer features a bright vacuum fluorescent alphanumeric display (VFD), touch panel keypad, a rear 0-1VDC analog BNC output for O2 readings, rear terminal strip with limit detection relays and 4 – 20 mA analog outputs of O2 and CO2 reading, and a RS232 digital interface.