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Item # 07-7021, O2Bio Gas Analyzer

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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.

Features & Applications  · Performance Conditions  · Performance Specifications  · Electrical Specifications

Features & Applications
  • Internal Sampling Pump and Solenoid Sample Valve.
  • Electronic flow meter and display.
  • Calibration electronically using 10%O2/5% CO2 and 100% O2 calibration gases.
  • Fast Response (< 1 sec) for prompt analysis.
  • Pressure and temperature corrected.
  • No false oxygen readings with Ar, H2O, CO2, CO, or hydrocarbons.
  • Measures at low flows of 10 to 250 ml/min, conserving overlay gas or via Sample Valve.
  • Relay contacts can be used to control external equipment.
  • Relay contacts are Form C (SPDT), 5 A 250 VAC rating.
  • Analog 4 to 20 mA, analog 0 to 1 VDC, and digital RS-232 outputs.
  • Visual, audible, and remote alarms for Low O2, High O2, Low Flow and System Check.

Performance Conditions


0 to 10% CO2 (30% CO2 range is optional)
5 to 100% Oxygen


0.1% in 5 to 100% range (O2), 0.01% in 0 to 10% ranges (CO2)

Sample Flow

50-250 ml/min with sampling pump on, 50-500ml/min with pump off. Sample Valve control allows gas to flow for a set number of seconds and HOLD that value for periodic measurement.

Response Time

150ms at 150 ml/min, filter setting to 3.

Stability (4 hrs)

±0.1% CO2 after 5 minute warm up
±0.1% in Oxygen LN mode

±0.3% in Oxygen XC mode

Dimensions (W x H x D)

7.5 x 3.0 x 14.0 in
190 x 76 x 356

Weight Instrument

5 Pound

Weight Power Module

0.5 Pound

Performance Specifications

Ambient Temperature (Operating)

5 to 40 ºC
-2 to 140

Ambient Temperature (Storage)

-20 to 60 ºC
-2 to 140

Cell Pressure

10.2 to 17.4 psi
70 to 120
500 to 900

Warm-up for Full Accuracy

5 min

Room Humidity

0 to 95%, non-condensing

Electrical Specifications

Sensor Power Requirements

1.5A, 12VDC

External Power Supply

47 to 63 Hz, 95 to 250 VAC

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Oxigraf, Inc.