APSA-370/CU-1 [High Sensitivity Model]

Ambient Hydrogen Sulfide (H₂S) Monitor

APSA-370 with CU-1 High Sensitivity Model is high sensitivity gas analyzer for measurement of hydrogen sulfide (H₂S) concentration at extremely low parts per billion level of concentration. APSA-370 with CU-1 uses an oxidation catalyst to convert hydrogen sulfide (H₂S) into sulfur dioxide (SO₂), which is later measured by ultraviolet fluorescence (UVF) method. Analyzer has installed into the sample line dehumidifier to reduce indication errors due to chanages in the atmospheric moisture concentration and to stabilize the catalytic reaction. This results into long-term stability of measurement. Measurement range 0 - 10 / 20 / 50 / 100 ppb and Lower Detection Limit 0.1 ppb enables application of the analyzer for the cleanroom airborn molecular contamination monitoring, ambient air background monitoring, monitoring of the cultural property preservation environment etc.

Application

Ambient air background monitoring
Cleanroom airborne molecular contamination monitoring
Monitoring of the cultural property preservation environment

Segment: Process And Environmental

Division: Ambient

Manufacturing Company: HORIBA, Ltd.

Base product: AP-370 Series

High sensitivity and high stability
A unique design of the detector and optical system realizes high sensitivity and high stability with low background
Reduced influence of the interfering components
Built-in aromatic hydrocarbon cutter eliminates the influence from interfering components
UV fluorescence detector resistant to moisture interference
Automatic calibration function
Function is available when APSA-370 (High sensitivity model) is connected with standard gas generator SGGU-610
No need to control UV lamp intensity
Incorporated UV lamp intensity compensator
Remote operation
Remote operation is available by LAN connection terminal (option), RS-232C (option)
No adsorption solution or reagents required
No human errors due to fully automated measurement
Specially treated sampling system
Special treatment for less chemical volatilization inside sampling tube to enable high precision of measurement

Related Industries

Research and Development

Related Application

Component	Hydrogen Sulfide
Model	APSA-370/CU-1 (High sensitivity model)
Principle	UV Fluorescence method + Oxidation catalyst
Range	0 - 10 / 20 / 50 / 100 ppb
Lower detection limit (LDL) *Typical value under certain conditions	0.1 ppb
Response time (T₉₀)	Within 5 minutes from CU-1 sample inlet
Displayed components	Instantaneous value of H₂S
Analog output	4 - 20 mA DC or 0 - 1 V DC
Communication interface	RS-232C or TCP/IP
Sample gas flow	Approx. 0.7 L/min
Operation gas	N/A
Calibration gas	N₂based SO₂ diluted by pure air from SGGU-610 or by ultra-pure air from gas cylinder
Ambient temperature	Cleanroom temperature
Ambient humidity	Cleanroom humidity
Power	AC100 - 120 V, AC200 - 240 V
Configuration (analyzer & calibration equipment)	APSA-370/CU-1 (High sensitivity model) SGGU-610

CU-1: converter, SGGU-610: standard gas generator

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