Air Sampling and Gas flux measurements
Respiration and Flux Chambers, allowing to sample air and measure gas flux rates in closed or open systems, in the lab or field. Vial Evacuator and Conditioner for preparing sample exetainers. A broad variety of custom scientific tools and instruments related to air sampling and gas flux / gaseous particle measurements (whole air / sorbent tubes) - for lab, field and UAV use is available. Versatile and cost-effective Gas Analysers for CO2, O2, Methane and H2, dissolved O2 and CO2 sensors, and gas switching / gas control instrumentation.
Air Sampling Systems - Lab to UAV
AS-100 Whole Air Sampler (Vials) for Lab & Field use. Automated sampling of gas aliquots into evacuated vials. 12 V System for Laboratory and Field deployment.
AS-110 UAV-based Whole Air Vial Sampler. For automatic, innovative air sampling campaigns and environmental monitoring tasks with medium-sized UAVs. 12 vials per flight. Manual or auto trigger sampling.
AS-101 Sorbent Tube Air Sampler for Lab & Field use. Automated sampling of gases and volatiles with a large range of compatible sorbent tubes. 12 V system for laboratory and field use.
AS-111 UAV-based Sorbent Tube Sampler. For automatic air, pollutants (particulate matter etc.) and (plant) volatile sampling campaigns with UAVs / drones. Four Sorbent Tubes per flight. Manual or auto trigger sample collection.
GF-500 Autosampler Soil Respiration. Automated, open chamber system for high-throughput soil respiration measurements in environmental chambers. Compatible with IRGA systems, Picarro etc.
Vial Evacuation
EV-101 Vial Evacuator / Conditioner. Automatically evacuates and purges sample vials with helium. Cost-effective solution for preparing evacuated air sample vials / exetainers.
Custom Chamber Systems for Gas Flux & Volatile Measurements, Isotope Labelling
PTFE Flux Chamber. For gas and particulate matter flux experiments involving highly reactive substances such as (biogenic) volatile organic compounds (BVOCs) or ozone. Teflon-coated base, air inlets and PET bags to minimise impact on reactive substances. Fully customisable outlets and plant (canopy) insertion table.
Ecosystem Respiration Chamber. For in situ gas exchange measurements & isotope labelling. Internal fan, gas and sensor outlets, sealing frame to soil... full customisation available. The chambers are a perfect match for gas analysers and gas control systems.
Mesocosm Respiration Chamber. For measuring gas exchange in pots and mesocosms under controlled conditions (growth chamber, etc.) and for isotopic labelling. Internal fan, gas outlets, segments... . Easy to use with CO2 Analysers etc.
Small Respiration Chambers, for gas exchange measurements on small pots, growth tubes, rhizoboxes and soil respiration rings. Fully customisable - metal, transparent plastic, round, square, etc.
Qubit Gas Analyzers
Together with Qubit Systems, Canada, we provide gas flux devices for respirometry studies in animals and insects, and for research and teaching in plant, algal and soil biology. Complementary sets are available for hands-on teaching of biology.
CO2, O2, Methane, H2 Gas Analyzers - Gas-Phase or Dissolved
CO2 Gas Analysers, 0-2000 ppm, single channel flow-through non-dispersive infrared CO2 analysers that measure CO2 gas in the range 0 to 2000 ppm with 1 ppm resolution. Robust stand-alone version with pump and flow meter (Q-S157) and modular version (Q-S151) available.
CO2 Gas Analysers, 5% or 10%, for high-range CO2 concentrations, adapted IRGA are available for the 0-5% and 0-10% CO2.
Dissolved CO2 Analyser (DCO2). Measures dissolved pCO2 in water at atmospheric pressure. The system consists of a DCO2 sampler with accessories and a non-dispersive IR CO2 analyser.
O2 Gas Analysers, single channel or differential, flow or stop-flow O2 sensors for measuring the gas phase oxygen in the 0-25% or 0-100% range with a high accuracy. Robust stand-alone version with pump and flow meters (Q-S108), modular version (Q-S102) and unique DOX differential oxygen analyser (Q-S104) available.
Dissolved O2 Sensors Both optical and polarographic sensors are available. Dissolved Oxygen (DO) Electrodes for measuring dissolved oxygen in liquid suspensions - Q-OX1LP O2 Set available. Alternatively, luminescence technology provides fast, simple and accurate measurements of DO in solutions.
CO2 and O2 Gas Analyser, with a combination of a flow-through non-dispersive infrared CO2 analyser, a galvanic cell O2 sensor and a built-in pressure sensor. Various versions are available with/without pump and mass flow monitor.
Methane CH4 Analysers, using the latest non-dispersive infrared (NDIR) technology to measure methane levels in the ranges 0-100, 0-500 or 0-5000 ppm. Various versions are available for gas phase CH4 measurements in the laboratory or in the field.
Hydrogen H2 Analyser, flow-through analyser for measurements of hydrogen gas in the range 0-100 ppm custom, higher range measurements.
Chamber Switching, Gas Flow Regulation, Pressure Sensing and Regulation
Gas Switching, Multiplexing Systems. The systems allow gas exchange measurements of multiple chambers with one set of gas analysers. Stop flow and open flow configurations are available for 4 or 8 chamber switching systems.
Gas Pump and Gas Flow Monitor. We offer Digital and Manual Gas Flow Meters, Gas Pumps, and combi instruments in the range of 0-1 or 0-3/4 L min-1 - essential components of any gas exchange measurement or gas delivery system.
Pressure Sensors and Gauges. Absolute, digital air pressure sensor, gas pressure gauges and gas valves.
Gas Control and Gas Mixing Systems
Gas Control and Mixing Systems. Gas control and Gas mixing systems regulate solenoid valves and control the levels of gases such as CO2, O2, CH4 and H2O vapour within a closed plant chamber or an animal cabinet. The system can e.g. be used to control CO2 and 13CO2 levels or to maintain elevated or reduced O2 or water vapour levels.
VSI Systems for Gas Flux, Volatile and Isotope Measurements in Chambers, and Air Sampling
- Gas Flux & Air Sampling Systems. Gas exchange measurements (e.g. of greenhouse gases including CO2) are often made using the closed non-steady-state chamber technique, where a chamber is placed on the soil or mesocosms for a short period and the change in gas concentrations in the chamber headspace is monitored over time, either by continuous measurements (IRGA etc.) or by sampling gas aliquots from the chamber headspace into evacuated vials or sorption tubes. Show more
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The resulting time series of gas concentration measurements provides an estimate of the surface-atmosphere exchange with the plot / mesocosm / potted plant on which the chamber is installed. In open dynamic systems (= steady-state flow-through systems), fresh ambient air is pumped into or extracted from a chamber and the flux is calculated from the air flow rate and the difference in concentration between the air entering and leaving the chamber after the air in the chamber headspace has reached a steady state. Air sampling ex situ for research and environmental monitoring of pollution can be done similarly by on-line measurements with gas analysers or by sampling for later analysis of air samples in the laboratory. While gas flux measurement systems, especially chambers, can be made of transparent PMMA (acrylic, plexiglass) for analysis of common gas concentrations and where plants are involved, chamber and tubing materials such as PTFE (Teflon) are required for experiments with highly reactive substances. Soil respiration chambers are often made of metal or plastic and, importantly, should be designed to open and close automatically (to match the sampling intervals of the connected analysers) for long-term in situ measurements. Finally, our whole air or sorbent tube samplers allow for the collection of gas samples in glass vials or sorbent tubes - where the sample can be preserved for subsequent analysis using laboratory equipment. Samples can be collected on the command of an operator or sampling can be triggered by events or time schedules - making the air samplers highly applicable to various field or laboratory settings and even enabling the use of UAVs to sample larger parts of the troposphere and inaccessible areas.
For soil moisture, temperature, EC readings, consider using Sentek soil moisture sensors and weather stations.