The IDT SGAS701 is a solidstate chemiresistor sensor designed to detect hydrogen in air. The sensor uses an integrated heater with highly sensitive MOx material tailored for detection of hydrogen. The chemiresistor sensors of IDTs SGAS family are based upon the principle that metal oxide materials undergo surface inter actions (physisorption and chemisorption) with gas molecules at elevated temperatures, resulting in a measurable change in electrical resistance.

As these materials are poly-crystalline (i.e., composed of multiple grains with distinct grain boundaries), the
adsorbed gases have significant electronic effects on the individual grains. These gassolid interactions result in a change in electron (or hole) density at the surface (i.e., a space charge forms), which in turn changes the electrical conductivity of the oxide. IDT has developed a set of nanostructured gas sensing materials with excellent sensitivity and stability.

Applications:

1. Leak Detection
2. Gas Concentration Detection
3. Breath Detection

Specifications:

1. High sensitivity to low hydrogen concentrations (<10 to 1000 ppm)
2. Fast response time (<15 seconds at 100ppm)
3. Environmental temperature range of 20C to 50C
4. Environmental humidity range of 0% to 90% RH,
   non-condensing
5. Low dependence on flow rate
6. Rugged, reliable sensor based on IDTs exclusive technology

Packages Includes:

1 x RENESAS Gas Detection Sensor, Hydrogen (H2), Diffusion, SGAS Series