H2S hydrogen sulfide sensor

methyl mercaptanelectrochemicalfor air quality monitoring

Product Overview
Smart cartridge designed by Kunak that integrates a sensor capable of accurately and reliably measuring Hydrogen sulphide levels.

Reliable real-time information on H2S
SENSOR-BASED | BEST AVAILABLE ACCURACY

Where is it found?
Most of this gas in the atmosphere has a natural origin from organic matter decomposition. Anthropically, it occurs in processes involving sulphur compounds and organic matter at high temperatures. Some industrial activities that emit this gas are paper pulp manufacturing, oil refining, water treatment plants and the viscose manufacturing textile industry.

Why is it harmful?
Hydrogen Sulfide (H2S) affects mainly the respiratory system with the first symptoms being nose, throat and eye irritation. This compound begins to be detected by human smell at concentrations much lower than those that can harm health. Short-term exposures to high concentrations can cause headaches, dizziness and vomiting.

H2S cartridge
The H2S cartridge has a built-in electrochemical sensor very sensitive to its target pollutant allowing it to detect small changes in H2S concentration. This cartridge also responds to methyl mercaptan (CH4S) and other total reduced sulphur compounds (TRS).
To cover different applications, there are 2 measurement ranges:

• Type A: detects low ppb concentrations in real environments. Although the Kunak algorithm corrects the temperature variations well, it is not recommended to use this cartridge to measure levels below 15 ppb.
• Type B: a higher range version that can measure up to 20 ppm, not so precise at low concentrations.

Technical specifications
Type: Electrochemical
Unit of measurement: µg/m³, ppb (A); mg/m³, ppm (B)
Measurement range: 0 - 2,000 ppb (A); 0 - 20 ppm (B)
Resolution: 1 ppb (A); 0.01 ppm (B)
Operating temperature range: -30 to 50 ºC
Operating RH range: 0 to 99 %RH
Recommended RH range: 15 to 90 %RH
Operating life: > 24 months
Guarantee range: 100 ppm
Limit of Detection (LOD): 2 ppb (A); 0.01 ppm (B)
Repeatability: 4 ppb (A); 0.01 ppm (B)
Response time: < 60 sec
Typical accuracy: ± 10 ppb (A); ± 0.05 ppm (B)
Typical precision R²: > 0.8
Typical slope: 0.78 - 1.29
Typical intercept (a): -5 ppb ≤ a ≤ +5 ppb (A); -0.05 ppm ≤ a ≤ +0.05 ppm (B)
DQO - Typical U(exp): -
Typical Intra-model variability: < 2 ppb (A); < 0.02 ppm (B)

Characteristics / Technical Specifications

• Electrochemical sensor for H2S
• Measures in ppb and ppm ranges
• Two types: Type A (low ppb), Type B (up to 20 ppm)
• Operating temperature: -30 to 50 ºC
• Operating humidity: 0 to 99 %RH (recommended 15 to 90 %RH)
• Operating life: >24 months
• Response time: <60 seconds
• Accuracy: ±10 ppb (A), ±0.05 ppm (B)
• Repeatability: 4 ppb (A), 0.01 ppm (B)
• Limit of detection: 2 ppb (A), 0.01 ppm (B)
• Guarantee range: 100 ppm
• Typical intra-model variability: <2 ppb (A), <0.02 ppm (B)