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A Handheld Multi-Gas Sensor Based on Selective Gas Adsorption on Mass Transducers

Award Information
Agency: Department of Homeland Security
Branch: N/A
Contract: HSHQDC-14-C-00065
Agency Tracking Number: HSHQDC-14-R-00035-H-SB014.2-006-0017-I
Amount: $99,980.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: H-SB014.2-006
Solicitation Number: HSHQDC-14-R-00035
Solicitation Year: 2014
Award Year: 2014
Award Start Date (Proposal Award Date): 2014-09-01
Award End Date (Contract End Date): 2015-02-28
Small Business Information
3560 Dunhill Street Suite 100 Suite 100
San Diego, CA 92121-1232
United States
DUNS: 827962304
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Steve Yamamoto
 (858) 256-7154
Business Contact
 Steve Yamamoto
Title: CEO
Phone: (858) 256-7154
Research Institution

We propose to develop a portable, rugged, handheld multi-gas sensor that is well within the solicitation requirements. We will leverage a mature class of mass sensors that include, for example: quartz crystal microbalances (QCMs) and capacitive micromachined ultrasonic transducers (CMUTs). These sensors boast extraordinary sensitivity to changes in mass (e.g., 50 femtograms for CMUTs) and are used today in several applications including high resolution ultrasonic imaging and film thickness monitoring. The membranes will be coated with materials that exhibit highly selective uptake of the target gases specified in the solicitation. When the device is exposed to a gas molecule that binds to the coating material the resulting mass change will be detected by the mass sensor. The chemical kinetics of the coatings will be engineered to selectively adsorb and desorb the target gases with sub-10 second response times. We will integrate a commercial particle counter with multiple mass sensors to measure all 12 gases specified in the solicitation. The mass sensors are small and thin (less than 10x10x1 mm) and light (less than 1 gram) and their readout electronics can fit on a standard pc board that is 3 in x 3 in x 0.2 in while consuming 300 mW of power allowing for 17 hours of continuous operation. Because of the extraordinarily small size of our sensor technology, we will be able to use ruggedized packaging to meet the drop test requirement, while still satisfying the target specifications for size, weight, battery life, cost, and response time.

* Information listed above is at the time of submission. *

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