Thumbnail	Caption
	Schematic of the Sensing Element of the Proposed Surface Acoustic Wave (SAW) Mercury Sensor
	Schematic Diagram of the Sensor Element Design
	Modular Mercury Sensing Prototype Package: Chamber (left) - Without Chamber (right)
	Completed Prototype Number 1 of the Mercury Sensor
	Individual Sensor Response
	Sensor Response When Exposed to Potential Interferences
	Bench Scale Interferent Tests (ppm). The base gas stream included 5% Oxygen, 15% Carbon Dioxide, 10% Water Vapor, with the balance Nitrogen.
	The first derivative response of a 15-Angstrom gold film Surface Acoustic Wave (SAW) sensor to various mercury concentrations.
	The response and first derivative of a 500-Angstrom gold film Surface Acoustic Wave (SAW) sensor when exposed to 7.3 micrograms per dry standard cubic meter (dscm) of mercury over 60 minutes.
	The response (thick line) and first derivative of a 75-Angstrom Gold film Surface Acoustic Wave (SAW) sensor exposed to 2.5 micrograms per dry standard cubic meter (dscm) of mercury over 60 minutes.
	New Apparatus for Simultaneous Measurement of Four Surface Acoustic Wave (SAW) Sensors
	A Screen Printout of the Computer Display of the Multi-Channel Sensor Operating Software
	Multi-Channel Sampling System
	Schematic Diagram of the Multi-Channel Sampling System
	Gold Trap Experiment Using One Channel of the Multi-Channel Mercury Surface Acoustic Wave (SAW) Monitor
	Setup for Mercury Spike Tests
	Surface Acoustic Wave (SAW) Sensor Response to a 5 Nanogram Mercury Spike from a Gold Trap (Gas Flow Rate 100 cubic centimeters per minute)
	Frequency Shift of Surface Acoustic Wave (SAW) Sensor With Respect To Nitrogen Flow Rate (Mercury Load 14.2 Nanograms)
	Calibration Curves for Two 75-Angstrom and one-1,000 Angstrom thick Gold Surface Acoustic Wave (SAW) Sensors (Flow Rate 8 Cubic Centimeters)
	Repeat Cycles of Exposures and Desorption of a Surface Acoustic Wave (SAW) Sensor to a Continuous Flow (Nitrogen) of Mercury at a Concentration of 1.2 Micrograms Per Dry Standard Cubic Meter (dscm)
	Plot of Slope Versus Mercury Concentration for Continuous Sampling
	Input Versus Output of Interferent Gases of the UNDEERC Sampling and Preconditioning System
	Gas Delivery System with Setup for Loading Gold Wire Traps
	Gas Preconditioner
	Sensor Research and Development Corporation's Mercury Surface Acoustic Wave (SAW) Detector
	Mercury Surface Acoustic Wave (SAW) Sensor
	Mercury Surface Acoustic Wave (SAW) Sensor

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