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Micro-Oxymax® Respirometer

Micro-Oxymax<sup>&reg;</sup> Respirometer
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General Information

A highly adaptable general purpose closed circuit respirometer with very high sensitivity.

US Patent: No. 4947339
European Patent: No. 0372429
Japanese Patent: No. 2117492

The Columbus Instruments' Micro-Oxymax system is a highly adaptable general purpose closed circuit respirometer. The system monitors the concentration of gas contained within an enclosed head space into which the material being monitored is respiring. Periodic sensing of the gas concentration, along with an equally accurate measurement of the volume of the head space, allows calculations of incremental and accumulated values for consumption and production. The Micro-Oxymax patented design principle provides a sensing threshold near 2 x 10-7 liter per hour.

The system can be configured for single or multiple gas sensing. Oxygen, Carbon Dioxide, Methane, Carbon Monoxide, Hydrogen Sulfide and Hydrogen can be sensed over specially selected ranges to meet almost any application. The Micro-Oxymax can be configured to monitor from one to 80 chambers.

Combining multiple gases, high sensitivity and multiple chambers with computer controlled operation makes The Micro-Oxymax unsurpassed in flexibility. The instrument finds application in all of the life sciences. It may be used for microbial respiration most often associated with environmental soil and water research; food science and preservation, insect respiration, tissue and skin respiration, plant research, and a wide range of other applications.

The modular design of the Micro-Oxymax allows an initial configuration for basic investigations that can be expanded later to include additional gases and/or chambers. The Micro-Oxymax software handles the details of data collation and the complexities of accommodating additional samples within the current experiment.

The Micro-Oxymax also allows operation under testing conditions that limit all other manometric and electrolytic based respirometers. The system automatically compensates for changes in pressure and temperature. In addition, the Micro-Oxymax will initiate refreshing of the head space gas if concentrations deviate beyond operator prescribed limits. The Micro-Oxymax keeps an accurate account of system performance and prevents problems before they happen. Internal diagnostics thoroughly test the configuration you've selected and make recommendations to optimize conditions for a successful test.

Features / Specifications

Suitable for these Standardized Aerobic and Anerobic Tests

ISO 14851
ISO 14852: Plastics in Aqueous Medium
ISO 14855
ISO 15985: Digestion
EN 13432: Plastics in Compost
ASTM D5209: Plastics in Sewage Sludge
ASTM D5210: Plastics in Sewage Sludge
ASTM D5271
ASTM D5511: Plastics under High Solids
ASTM D5338: Plastics in Controlled Compost
ASTM D5988: Plastics in Soil
ASTM D6691: Plastic Materials in Marine Environment
OECD 301B: Biodegradability of the material over a minimum of 28 days in a liquid environment

High Sensitivity: 2x10-7 liter of gas per hour 
Supported Gases:

O2: 0-1%, 19-21%, 0-100%
CO2: 0-1%, 0-3%, 0-10%, 0-100%
CH4: 0-1%, 0-5%, 0-10%, 0-30%, 0-100%
CO: 0-1%, 0-10%
H2: 0-2000ppm
H2S: 200ppm
NO2: 150ppm
N2O: Contact us for available ranges

Multiple Chamber Sensing: 1 to 80 Chambers 
Fully automated operation
Maximum Head Space Volume: 50mL to 10L m), H2 (0-2000 and 0-10,000ppm)

Ordering Information

7395-B1 Micro-Oxymax Multiple Sensor 1 Chamber Base System
7395-B2 Micro-Oxymax Multiple Sensor 2 Chamber Base System
7395-B4 Micro-Oxymax Multiple Sensor 4 Chamber Base System
7395-B6 Micro-Oxymax Multiple Sensor 6 Chamber Base System
7395-B8 Micro-Oxymax Multiple Sensor 8 Chamber Base System
7395-B10 Micro-Oxymax Multiple Sensor 10 Chamber Base System
7395-B20 Micro-Oxymax Multiple Sensor 20 Chamber Base System
7395-B40 Micro-Oxymax Multiple Sensor 40 Chamber Base System
7395-B60 Micro-Oxymax Multiple Sensor 60 Chamber Base System
7395-B80 Micro-Oxymax Multiple Sensor 80 Chamber Base System
Contact Columbus Instruments for Custom Configurations 

References Cited (361)