Products that monitor, analyze, store and recover materials that are harmful to our environment are becoming more sophisticated everyday. In addition, manufacturers worldwide are increasingly challenged with producing products in an environmentally sound manner. Thomas can provide solutions for any challenge requiring pressure, vacuum or flow within the environmental arena.
Typical applications for Thomas products include:
A compressor is used to pump air via a diffuser into a pond or lake. Pumping air bubbles into a pond or lake increases the oxygen concentration of the water thus preventing the water from becoming stagnant. Aeration is used also to provide suitable living conditions for fish and other aquatic species in places otherwise lacking in sufficient oxygen.
Air and dust sampling determines the level and types of viable fungal propagules within building trouble spots, and suggests the presence of significant indoor mold growth sites ("amplifiers").
This type of instrumentation is required to check hydrocarbons that are present in emissions that escape into the atmosphere through industrial smokestacks. The EPA regulates how much of certain chemicals, such as CO2, CO, SOx, NOx etc., can be present in the gases that are emitted to the atmosphere.
A portable flame ionisation detector is used to measure concentrations of hydrocarbons within a sampled gas. The presence of hydrocarbons is detectable by burning the sampled gas in an air-hydrogen flame. The presence of hydrocarbons in the sampled gas, when burnt with an air-hydrocarbon mix, causes high level of ionisation. The level of ionisation is proportional to the number of carbon atoms within the sample which is taken by the diaphragm pump.
In many countries, safety devices are required for the monitoring and protection of fuel oil in buried tanks. To prevent the leakage of fuel, double-walled tanks or plastic covers (for older, single-walled tanks) are used. In between the double-wall a vacuum is built up and monitored by a pressure detector. Pressure variations and very small leakage on tube fittings and threaded joints are constantly leveled by the pump integrated in the monitoring device. The pressure detector switches on the pump when a minimum pressure is reached and switches it off when a maximum pressure is reached.
For manufacturers of semiconductors, pharmaceuticals and biotechnology products, indoor air quality is critical. In these environments, "cleanrooms" monitor the air for particle and dust contamination. Unlike gas analysis, a particle counter measures the size and quantity of the contamination - it makes no identification. Measurement is made through observing the scattering of a laser beam as the sample passes through it. Essential for this application is a constant and pulsation free flow, in addition to the ability to control the flow easily.
Refrigerant is used today in all air conditioning systems for motorised vehicles along with residential and commercial buildings, and requires periodic servicing. The Freon used in these systems can no longer be purged to the atmosphere and must be recovered in federally approved containers.
These types of systems are used today to control wastewater in residential homes. Wastewater from the household enters a compartment where air is introduced to begin the growth of aerobic organisms. The organisms convert the waste organic materials into gases and additional microbial cell material. In addition to supplying oxygen, the aeration system keeps the contents of the aeration zone well mixed to provide optimum exposure of the microorganisms to the waste materials. Effluent may be discharged to a ditch or to a new or existing drain field, whichever is mandated by local health restrictions.
Gasoline vapor recovery is the process of capturing gasoline vapors emitted from a vehicle's fuel tank during the refueling process. Vapor recovery prevents the formation of low-level ozone and the release of toxic air contaminants found in gasoline (petrol). A switch detects pressure limitations inside the tanks and turns the compressor and off. The vapors are sucked through a scrubber where the liquid trapped is returned to the liquid pipeline system or to the tanks, and the vapor recovered is pumped into holding tanks.
Water is a critical component in all residential and industrial settings. It needs to be constantly analysed to assure it is safe to drink and free from harmful chemicals when emitted into rivers and lakes. This instrumentation will analyse such items as dissolved oxygen, fecal coliform, pH, temperature, phosphates, nitrates, turbidity and heavy metals.