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Jerome Meter Measurement Variability

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The Jerome Meter 631X, manufactured by Arizona Instruments, is used extensively in the odor control industry for hydrogen sulfide measurement. It is the only portable measurement device reportedly capable of measuring from 50-parts-per-million-by-volume (ppmv) in air, down to a concentration of 0.003-ppmv. The Jerome Meter is used widely by wastewater utilities, consultants and odor control specialists.

The Jerome Meter is used by the environmental department of a city that owns and operates multiple wastewater treatment plants (WWTPs). This city owns numerous Jerome Meters which are used to measure hydrogen sulfide in the inlet and exhaust of its odor control systems, within enclosed spaces, at the perimeter of its WWTPs, and in the communities surrounding its WWTPs.

Jerome Meters are used to measure the inlet and exhaust hydrogen sulfide concentration of the city's many carbon adsorbers. The adsorbers are used as single stage treatment units in most applications and as a second stage, polishing treatment unit when used with packed tower wet scrubbers. When measuring the carbon adsorber exhaust air, the Jerome Meters help the city to determine when the carbon requires replacement. They are also used to determine regulatory compliance with the hydrogen sulfide limits in the city's air permits.

In late 2005 Jerome Meter readings of a carbon adsorber exhaust became suspect because the values were high and the carbon of the vessel had been just recently replaced. This led to a study measuring the inlet and exhaust of six carbon adsorbers using multiple Jerome Meters.

This paper will present measurement results from multiple Jerome Meters measuring common air samples and will compare the variability to the manufacturer's precision limits. The source of the air being conveyed to the carbon adsorber (e.g. sludge storage tanks, sludge dewatering), sample source (e.g., carbon adsorber inlet or exhaust) and maintenance history of the Jerome Meters will be presented.

Because of the wide spread use of this device for odor control equipment performance and regulatory compliance assessments, this paper provides important insight into the Jerome Meter performance over a wide range of concentrations.
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Document Type: Research Article

Publication date: 2008-01-01

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