Qubit O2 gas analysers for applications in life science research, education, environmental monitoring and industry. Sensors feature temperature and pressure compensation and offer variations in concentration range, response and resolution. Gas-phase Oxygen analysers include:
Q-S108 Absolute O2 Analyzer. The most versatile, accurate and cost-effective oxygen analyser on the market. The use of a fuel cell sensor that operates at ambient temperature sets it apart from its counterparts that rely on power-hungry zirconium sensors that require an on-board oven. The sensor is equipped with acidic electrolytes and a Teflon diffusion membrane, ensuring accurate pO2 measurements over the entire range. For animal and human respirometry, the Q-S108 Absolute O2 analyser integrates seamlessly with the Q-S158 CO2 analyser for measurement of the respiratory quotient. It can be configured in a stop-flow or closed gas exchange system for respirometry on smaller or less active organisms. Calibration is a breeze, requiring only dry ambient air (optimal for the most stringent measurements is the use of an N2 zero gas). The Q-S108 maintains linearity over its full dynamic range. Simplify the process further by using the Q-S108 O2 Analyser with the Q-C901 Logger Pro software, or other compatible data acquisition software.
See below for Q-S108 Specifications, and References.
Please contact us for the manual and further information.
Q-S102 O2 Analyser. Measures oxygen concentration in flow-through gas exchange systems, offering a range of 0-25% or 0-100% with an accuracy of 0.21%. The analyser measures the total gas pressure at the O2 sensor. Perfect for assessing O2 uptake in organisms with high metabolic rates, the Q-S102 excels in an open flow system configuration. For organisms with lower metabolic rates, it seamlessly transitions to a closed flow system, allowing the calculation of O2 uptake rate from the slope of O2 decline in the system. Operating the Q-S102 O2 analyser requires a data interface with two analogue signal ports and dedicated software; using the Q-C610 LabQuest Mini data interface with Q-C901 Logger Pro Software is recommended. The Q-S102 O2 Analyser is a key component in Q-Box Research Packages:
Q-S108 / Q-S102
The O2 analysers have a galvanic cell (a lead-oxygen battery) consisting of a lead anode, an O2 cathode and an acid electrolyte. It also contains an O2-permeable Teflon FEP membrane with a gold electrode bonded to its surface; oxygen diffusing through the membrane is electrochemically reduced at the gold electrode. A resistor and a thermistor (for temperature compensation) are connected between the anode and cathode. The output of the instruments is proportional to the current flowing through the resistor and thermistor and this is proportional to the pO2 in contact with the Teflon membrane.
|Specifications||Q-S108 / Q-S102||OPEN|
Operating principle: Acid Electrolyte, Teflon Diffusion Membrane; influence by other gases: Ammonia and Ozone
Detection Range: 0-25% and 0-100 %O2 (linear)
Analog Output: 0 to 5 Volt
Resolution / Accuracy: ±40 ppm / ±0.21% of Full Scale
Response Time (90%): 12 s
Life Expectancy of sensor: 3-5 years, sensor easily replaceable
Gas pump: 0-650 ml min-1, default setting of 100 ml min-1; minimumflow: 5 mL min-1
Built in total gas pressure reading at the sensor and correction of signal
Pressure Range: 50,6 kPa to 152 kPa; pressure effect - Output voltage changes proportionally
Operating Temperature: 5 to 40°C; built in temperature control and correction of signal
Shock Resistant: to 2.7 G; avoid strong vibration
Power Supply: 12 Volt
Dimensions: 27.7 x 25.5 x 11.2 cm (L x W x H)
Weight: 2.45 kg (Q-S108) / 1.35 kg (Q-S102)
Battery pack for field use
|References||Gas-Phase Oxygen Sensors||OPEN|
Q-S104 Differential O2 Analyser (DOX). The world's only differentially patented oxygen analyser with an impressive ±1 ppm O2 resolution in ambient air conditions. The Q-S104 DOX can measure real-time oxygen consumption rates in tiny insects and monitor photosynthetic oxygen production from a single intact leaf. The Q-S104 Differential O2 Analyser has the widest dynamic range of any gas analyser on the market - at lower resolution it can even assess O2 exchange in larger mammals. Seamlessly integrated with a CO2 analyser (Q-S157) in an open gas exchange system, this powerful tool facilitates Gas Exchange Quotient measurements at a low range. Operating in true differential mode, the Q-S104 DOX Differential Oxygen Analyser offers ranges of ±100, ±300, and ±1000 Pa O2. It simultaneously monitors both the reference and sample oxygen sensors and has an automatic reference-sample function that provides measurements of any oxygen difference. This flexibility allows measurement of oxygen exchange in different species by selecting the appropriate range setting. Unlike many high resolution gas analysers that require calibration with expensive standard gases or complicated mixing systems, the Q-S104 DOX O2 analyser uses ambient air and employs a simple pressure-based calibration method. Calibration is not only simple, but also remarkably accurate, maintaining perfect linearity over the full dynamic range of the analyser and calibration gas. The use of air as the 'calibration gas' makes calibration cost-effective and easily accessible. Applications include: Single leaf photosynthetic O2 exchange, leaf dark respiration rate (for CO2 see also the Q-CO650 photosynthesis package), Insect Respiratory O2 Consumption, Small & large animal respirometry, Soil Respiration, etc.
Power Supply: 12V 115/220 VAC