GASTEC CORPORATION - For all types of gas and vapour

Hydrogen sulphide detectorHS-7A/HS-7A-S

Specific sensor developed for measuring hydrogen sulphide

Incorporates a constant potential electrolytic type sensor, enabling hydrogen sulphide to be accurately measured.

* The HS-7A-S comes with a 5 m sensor cord.

  • Slim / Compact and lightweight, only 110g
  • Simple auto zero calibration procedure
  • Explosion proof
  • Low power consumption
Hydrogen sulphide detector HS-7A/HS-7A-S
*The products may not be sold depending on countries and regions. 


Measurement range 0 - 30.0ppm (enhanced range : 30.1 - 50.0ppm)
Measurement method Controlled potential electrolysis method
Sampling method Diffusion
Indicating accuracy +/- 5% of full scale at time of calibration
Display Digital LCD
Explosion proof Certified by Japan Ministry of Health, Labour and Welfare
(Class Ex ia ⅡC T3 Ga / Certification No.TC22880)
Operating Temperature / Humidity range Temperature : -10 - 40 ℃
Relative humidity : 30 - 90 %RH
Power source One AAA alkaline battery provides about 3500 hours of operation
(when no alarm signal is emitted)
Dimensions 48(W) x 37(D) x 105(H) mm
Weight 110g


Calibration is necessary for ensuring accurate measurement.

Available in lengths of 5m, 10m, 20m, 30m.

This is a system for supplying calibration gas to the diffusion type sensor.

Product inquiries

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