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SensorsX SX-GH2STMA Electrochemical Hydrogen Sulfide Sensor

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Hydrogen Sulfide Sensors (H2S)

SX-GH2STMA Series

The SX-GH2STMA is a compact electrochemical hydrogen sulfide sensor for detecting H₂S from 0–100 ppm. It offers fast response, high sensitivity, low power consumption, stable performance, and a two-year service life, making it suitable for industrial, mining, environmental, and safety-monitoring applications.

Model: SX-GH2STMA Series
Detection Principle: Electrochemical, 3-electrode
Target Gas: Hydrogen Sulfide (H₂S)
Detection Range: 0–100 ppm
Sensitivity: 145 ± 25 nA/ppm
Response Time: <30 s
Zero Drift: ±2 ppm
Resolution: 0.5 ppm
Operating Temperature: −30°C to +50°C
Service Life: 2 years

$27.00

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Product Overview

The SX-GH2STMA hydrogen sulfide gas detection sensor is a potentiostatic electrochemical sensor. Hydrogen sulfide and oxygen undergo oxidation-reduction reactions at the working electrode and counter electrode, respectively, generating an electrical current. The generated current is proportional to the hydrogen sulfide concentration, allowing the H₂S concentration to be determined by measuring the output current.

Main Features

High Accuracy , Long Service Life
Fast Response , Fast Recovery
Small Size low power consumption, high sensitivity
Wide Linear Range
Strong Anti-Interference Capability
High Repeatability and stability

Product Application

Hydrogen sulfide alarms and detectors	Industrial site H₂S gas detection
Mine H₂S detection	Ambient air H₂S detection

Technical Data

Measurement
Model	SX-GH2STMA Series
Detection Principle	Electrochemical, 3-electrode
Detection Gas	Hydrogen sulfide (H₂S)
Detection Range	0–100 ppm
Maximum Load Concentration	200 ppm
Sensitivity & Stability
Sensitivity	145 ± 25 nA/ppm
Zero Drift	±2 ppm
Resolution	0.5 ppm
Repeatability	< ±2%
Long-Term Stability	<2% signal/month
Linearity	Linear, regression coefficient R² = 0.999
Response
Response Time	< 30 s
Stability & Service Life
Shelf Life	12 months after delivery
Service Life	2 years
Electrical
Bias Voltage	0 V
Load Resistance	5–30 Ω
Environmental Conditions
Operating Temperature	−30°C to +50°C
Operating Humidity	15–90% RH, non-condensing
Operating Pressure	90–110 kPa
Mechanical Data
Overall Diameter	Ø14 mm
Sensing Opening Diameter	Ø9 mm
Body Height	9.5 mm
Pin Length	3.5 mm
Pin Diameter	Ø0.8 mm
Dimensional Tolerance	±0.2 mm
Cross Interference
Carbon Monoxide CO	0.75 ppm H₂S displayed value at 100 ppm
Sulfur Dioxide SO₂	2 ppm H₂S displayed value at 20 ppm
Hydrogen H₂	1.5 ppm H₂S displayed value at 1000 ppm
Ammonia NH₃	−1 ppm H₂S displayed value at 50 ppm
Nitrogen Dioxide NO₂	−1 ppm H₂S displayed value at 5 ppm

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