APNA-370/CU-2 [High Sensitivity Model]

Ammonia Monitor

The APNA-370 with CU-2 High Sensitivity Model is a gas analyzer designed for high sensitivity continuous monitoring of ammonia (NH₃) concentration, even at extremely low parts per billion levels. APNA-370 with CU-2 adopts an oxidation catalyst to convert ammonia into nitrogen oxides and chemiluminescence detection (CLD) method to quantify the increased nitrogen oxides (NOx) concentration after catalytic oxidation. By employing the dual cross-modulation CLD method, analyzer uses one cell and one detector and alternating the introduction of sample gas and reference gas at regular intervals. Such design contributes to the long-term stability and minimal zero drift, enabling reliable measurement and high sensitivity with the Lower Detection Limit 1 ppb. Continous monitoring of amines is also possible by a separate unit incorporated with an optional special scrubber.
APNA-370 with CU-2 High Sensitivity Model is used for monitoring airborn molecular contamination in cleanrooms, as well as for monitoring ambient air quality and other applications that require monitoring of ammonia in parts per billion (ppb) concentrations.

Application

Ambient air quality monitoring
Airborne molecular contamination (AMC) monitoring in cleanrooms

Segment: Process And Environmental

Division: Ambient

Manufacturing Company: HORIBA, Ltd.

Base product: AP-370 Series

High sensitivity and high stability
HORIBA's original cross-modulation CLD method ensures long-term stability and high reliability of measurement data
A unique design of the detector and optical system realizes high sensitivity of measurement
Automatic calibration function
Function is available when APNA-370 (High sensitivity model) is connected with standard gas generator SGGU-610
Data communication
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	Ammonia^*1 / Nitrogen Oxides
Model	APNA-370/CU-2 (High sensitivity model)
Principle	Cross Modulation Chemiluminescence Detection method + Oxidation catalyst
Range	0 - 100 / 200 / 500 / 1000 ppb
Lower detection limit (LDL) *Typical value under certain conditions	1 ppb
Response time (T₉₀)	Within 5 minutes from CU-2 sample inlet
Displayed components	Instantaneous value of NH₃ / NOx
Analog output	4 - 20 mA DC or 0 - 1 V DC
Communication interface	RS-232C or TCP/IP
Sample gas flow	Approx. 2.0 L/min
Operation gas	N/A
Calibration gas	Dilute N₂ based NO gas with SGGU-610
Ambient temperature	Equivalent to cleanroom temperature
Ambient humidity	Equivalent to cleanroom humidity
Power	AC100 - 120 V, AC 200 - 240 V
Configuration (analyzer & calibration equipment)	APNA-370/CU-2 (High sensitivity model) SGGU-610 (with special NH₃scrubber for zero gas)