SS2198-HT (H₂S)

Electrochemical H₂S Sensor (0~100ppm)

DESCRIPTION

The SS2198_HT is an electrochemical hydrogen sulfide (H₂S) sensor designed for stable performance even in high-temperature and low-humidity environments. It accurately measures H₂S concentrations from 0 to 100 ppm, with an output signal of 450 ± 80 nA/ppm and a fast response time under 30 seconds (T90). The sensor does not react to CO or hydrogen, and offers excellent selectivity with minimal cross-sensitivity to SO₂, NO, and NO₂. With a maximum operating temperature of +70℃ and a service life exceeding 24 months, the SS2198_HT is ideal for fixed installations in petrochemical plants, wastewater treatment, mining, and pipe interiors.

KEY FEATURES

- Measuring Range: 0–100 ppm (Max: 500 ppm)
- High Temperature Operation: Up to +70℃
- Output Signal: 450 ± 80 nA / ppm
- Resolution: <0.1 ppm (typical)
- Response Time: T90 < 30 sec
- No response to CO or H₂
- Low cross-sensitivity to SO₂, NO, NO₂
- Service Life: ≥24 months

Performance Characteristics
Output Signal	450±80 nA / ppm
Typical Baseline Range (pure air, @ 20℃)	±2 ppm H₂S equivalent
Response Time (T90)	< 30 seconds
Filter	None
Measurement Range	0–100 ppm
Maximum Overload	500 ppm
Linearity	Linear
Repeatability	< ±2 ppm H₂S equivalent
Recommended Load Resistor	10 ohms
Resolution (Electronics Dependent)	< 0.1 ppm typical
Bias Voltage	0 mV
Environmental
Temperature Range Continuous	-20℃ to +70℃
Pressure Range	800 to 1200 mbar
Operating Humidity Range	15% to 90% RH
Lifetime
Long Term Output Drift	< 5% per annum
Recommended Storage Temp	0℃ to 20℃
Expected Operating Life	> 24 months in air
Standard Warranty	24 months from date of dispatch
Intrinsic Safety Data
Maximum at 1,000 ppm	40 mA
Maximum o/c Voltage	< 1.0 V
Maximum s/c Current	< 0.1 A

Performance Characteristics

Output Signal

450±80 nA / ppm

Typical Baseline Range (pure air, @ 20℃)

±2 ppm H₂S equivalent

Response Time (T90)

< 30 seconds

Filter

None

Measurement Range

0–100 ppm

Maximum Overload

500 ppm

Linearity

Linear

Repeatability

< ±2 ppm H₂S equivalent

Recommended Load Resistor

10 ohms

Resolution (Electronics Dependent)

< 0.1 ppm typical

Bias Voltage

0 mV

Environmental

Temperature Range Continuous

-20℃ to +70℃

Pressure Range

800 to 1200 mbar

Operating Humidity Range

15% to 90% RH

Lifetime

Long Term Output Drift

< 5% per annum

Recommended Storage Temp

0℃ to 20℃

Expected Operating Life

> 24 months in air

Standard Warranty

24 months from date of dispatch

Intrinsic Safety Data

Maximum at 1,000 ppm

40 mA

Maximum o/c Voltage

< 1.0 V

Maximum s/c Current

< 0.1 A

PRODUCTS

Product

SS2198-HT (H₂S)

SS2198-HT (H₂S)

Electrochemical H₂S Sensor (0~100ppm)

DESCRIPTION

KEY FEATURES

Product Specifications

Sensor Specifications

Accessories

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