Trace Hydrogen Gas Sensor

The SGAS701 is a solid-state chemiresistor sensor designed to detect hydrogen in air. The sensor uses an integrated heater with highly sensitive MOx material tailored for detection of hydrogen.


  • High sensitivity to low hydrogen concentrations (10 to 1000 ppm)
  • Fast response time (15 seconds at 100 ppm)
  • Environmental temperature range of -20°C to 50°C
  • Environmental humidity range of 0% to 90% RH, non‑condensing
  • Low dependence on flow rate

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
SGAS701 Active TO4 TO 4 C Yes Tray Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
SGAS701 Datasheet Datasheet PDF 704 KB Oct 25, 2017
Application Notes & White Papers
AN-988 Resistance Measuring Circuits for SGAS Sensors Application Note PDF 459 KB Oct 26, 2017
AN-989 Analog Front-End Reference Design for SGAS Sensors Application Note PDF 326 KB Oct 19, 2017
SGAS701, SGAS707 & SGAS711 Gas Sensor Modules Overview Overview PDF 292 KB Nov 13, 2017
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017

Evaluation Boards

Part Number Title Sort ascending
SMOD701 Trace Hydrogen Sensor Evaluation Kit