H2S Ambient Analyser

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APSA-370/CU-1 Ambient H2S monitor measures SO2 converted H2S through oxidation catalyst based on Ultra Violet Fluorescence. In order to reduce measurement error by water concentration fluctuatin in ambient, humidifier is set at sample line. It enables long-term stability according to stabilizing catalytic reaction.

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High Sensitivity Monitoring: Continuously monitor H₂S with a high sensitivity range.
Stabilized Reactions: Integrated humidifier at the sample line ensures stabilized catalytic reactions.

Parameter	Value
Measurement Gas	Hydrogen Sulfide (H₂S)
Measurement Principle	Oxidation Catalyst + UV Fluorescence
Measurement Range	0–0.1 / 0.2 / 0.5 / 1.0 ppm
Lower Detectable Limit	2 ppb
Repeatability	±3.0% of F.S.
Linearity	±2.0% of F.S.
Zero Drift	±2% of F.S./day
Span Drift	±5% of F.S./day
Response Time (T90)	180 sec. or less (from CU-1 converter unit)
Sample Gas Flow Rate	Approx. 0.7 L/min
Operation Gas	None
Indication	Measuring value, alarm
Alarm	APSA-370: Calibration error, Battery error, Flow rate error, Pressure error, Temperature error in catalyzer CU-1: Temperature error in catalyzer
Input/Output	0–1V / 0–10V / 4–20mA (2 systems: momentary value or moving average)
Communication	Contact I/O, RS-232C (optional)
Operating Temp./Humidity	0–40°C / ≤ 85% RH
Power Supply	100–240 VAC, 50/60 Hz
Power Consumption	APSA-370: 150 VA CU-1: 150 VA
Dimensions	APSA-370: 430(W) × 550(D) × 221(H) mm CU-1: 430(W) × 550(D) × 221(H) mm
Mass	APSA-370: approx. 19 kg CU-1: approx. 10 kg

H2S Ambient Analyser

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