SterLRay germicidal ultraviolet lamps are distributed by Aqua Health Solutionsto standard and custom specifications

Ster-L-Ray germicidal ultraviolet lamps are distributed by Aqua Health Solutionsto standard and custom specifications. We carry a complete stocking inventory of all standard germicidal ultraviolet replacement lamps.
Ster-L-Ray germicidal lamps are short wave low pressure mercury vapor tubes that produce ultraviolet wavelengths that are lethal to micro-organisms. Germicidal lamps should not be confused with sunlamps or black light lamps, for while these are also ultraviolet lamps, the ultraviolet produced is of longer wavelength and is not useful for germicidal applications.

	Introduction
	Slimline Germicidal Ultraviolet Lamps Specs
	Slimline U-Shape Germicidal Ultraviolet Lamps Specs
	Cold Cathode Germicidal Ultraviolet Lamps Specs
	Preheat Germicidal Ultraviolet Lamps Specs
	Operating Characteristics Charts

Approximately 95% of the ultraviolet energy emitted from Ster-L-Ray germicidal lamps is at the mercury resonance line of 254 nanometers. This wavelength is in the region of maximum germicidal effectiveness and is highly lethal to virus, bacteria and mold spores. Ster-L-Ray ozone producing lamps are available in slimline, cold cathode and preheat types. The high purity fused quartz used in Ster-L-Ray ozone producing lamps is transparent to both germicidal (254 nm) and ozone producing (185 nm) wavelengths.

Wavelength Nanometer (nm), millimicron (mµ) and the Angstrom unit (Å) are all units of length used to describe ultraviolet wavelengths. Nanometer and millimicron are synonymous and equal to a billionth of a meter. An Angstrom unit is one tenth as long; therefore 2540 Å = 254 mµ = 254 nm.

Slimline Germicidal Lamps - Ster-L-Ray Slimline germicidal lamps are instant starting and utilize a coil filament on each end which operates hot. Lamp life is governed by the life of the electrodes and is affected by the frequency of starting. Slimline germicidal lamps are well suited to applications requiring high ultraviolet intensity such as water sterilization, air purification in duct systems and conveyorized product disinfection.

Cold Cathode Germicidal Lamps - Ster-L-Ray cold cathode germicidal lamps are instant starting and utilize a large cylindrical cathode instead of a tungsten filament. Due to this construction the lamp is not adversely affected by frequent starting and the life is considerably in excess of other lamp types. Cold cathode germicidal lamps have favorable operating characteristics and maintain a high ultraviolet transmission throughout life even at reduced temperatures. They are, therefore, widely used in walk-in refrigerators and holding rooms. Ster-L-Ray cold cathode germicidal lamps are well suited to disinfection of air and surfaces of unoccupied areas due to their long life and low depreciation. Cold cathode germicidal lamps are also employed in applications where frequent starting is a requirement.

Preheat Germicidal Lamps - Ster-L-Ray preheat germicidal lamps are operated by a preheat-start circuit that employs a relatively compact and economical ballast. The preheat circuit requires four electrical connections per lamp and a slight to moderate delay is needed to start the lamp. Due to increased circuit complexity, reliability is regarded as slightly less than slimline or cold cathode instant start circuits.

Ozone Producing Lamps Ozone (O³) is a highly reactive form of oxygen and is useful in water purification, as a deodorizer and as a cleaning agent. Ultraviolet wavelengths shorter than 200 nanometers are capable of producing ozone from oxygen (O²) in the air. The mercury vapor arc, in addition to producing considerable ultraviolet output at 254 nm, also produces a small amount of output at 185 nm. The high purity fused quartz used in Ster-L-Ray ozone producing lamps is transparent to both germicidal (254 nm) and ozone producing (185 nm) wavelengths. Because it is necessary to avoid exposing personnel to high concentrations of ozone, the use of ozone lamps is limited to applications in which ozone concentration will not exceed .05 parts per million in occupied spaces. Ster-L-Ray ozone producing lamps are available in slimline, cold cathode and preheat types.