APNA-380 Nitrogen Oxides Monitor

Nitrogen Oxides Monitor

For Your Needs in Air Quality Monitoring

The APNA-380 is an analyzer for measuring nitrogen oxides in ambient air and other background gases, for air quality control as well as for variety of industrial applications. HORIBA's state-of-the-art cross-modulation chemiluminescence enables high sensitivity and stable real-time continuous measurement.

Division: Ambient
Manufacturing Company: HORIBA, Ltd.

 Ultimate Performance

  • Optimized internal structure enables rapid switching between NOx and NO lines, allowing real-time continuous measurement and unparalleled trackability
  • Cross-modulation chemiluminescence provides excellent sensitivity, stability and robustness
  • Wide measurement range with up to 8 ranges selectable, minimum 0-0.1 ppm and maximum 0-20 ppm
  • Enhanced Lower Detection Limit and response time


User-Friendly Interface & Functionality

  • Durable 7-inch wide color touch screen LCD with intuitive interface and trend graph
  • Selectable metrics (ppb, μg/m3, ppm, mg/m3), response time (moving average value), and calculation method
  • Programmable dilution ratio
  • Dust filter accessible from the front panel for easy daily maintenance




Reduced Operational Expense & Maximum Uptime

  • Remote diagnostics allow fast and effective maintenance
  • Internal parts timer with alarm facilitates timely parts replacement, optimizing parts stock
  • Module design enables easy and fast replacement at field
  • High-quality, long lifetime parts for maximum uptime


 Connected & Intelligent

  • Remote operation from various devices:PC, tablet or smartphone
  • Modbus® TCP and RTU communication
  • USB flash drive can be utilized for data storage

      * Standard specification is wired LAN connection. For wireless connection, separate device is required.

Connected & Intelligent


Module Design for Various Needs & Customizations

  • Each standalone module, powered by DC 24 V, is capable of providing measurement results
  • Customizable for stationary, wall mount, mobile or portable installations
  • Easy integration of multiple AP-380 measurement modules into air quality monitoring station or dilution continuous emission monitoring station (CEMS)


Environment-Friendly Design

  • Ozone generator with low environmental impact and clean exhaust
  • Remote operation reduces emission from transportation, contributing to the reduction of carbon footprint
  • Approx. 8%* reduction in power consumption
  • Lightweight design. Weight reduced on approx.15%*
  • Long life parts reduce environmental load

      * In-house comparison with previous model.


Related products

Carbon Monoxide Monitor

Ozone Monitor

Sulfur Dioxide Monitor

Hydrocarbon Monitor


■ APNA-380 Specifications

ComponentNitrogen oxides (NO, NO2, NOx)
Measuring principleCross-Modulation Chemiluminescence
Measurement range0-0.1/0.2/0.5/1.0/2.0/5.0/10/20 ppm (up to 8 ranges selectable, auto-range)
Lower Detection Limit(2σ)< 0.4 ppb*1*2
Measurement unitppb, μg/m3, ppm, mg/m3
Sample gas flow rateApprox. 0.7 L/min
Repeatability±1.0% of full scale
Linearity±1.0% of full scale
Zero drift< 0.4 ppb (24 h)
Span drift< 0.5% of full scale (24 h)
Response time (T95)< 40 s from the inlet*2
Display7-inch color LCD with touch panel
CommunicationEthernet × 2 (Modbus® TCP), RS-232C × 1 (Modbus® RTU) , USB flash drive × 1
Analog output (option)Maximum : 3 channels (insulated)
DC 4-20 mA, DC 0-0.1 V, DC 0-1 V, DC 0-5 V or DC 0-10 V
Digital output (option)Relay contact output for range 3 channels, relay contact output for other 6 channels
Digital input (option)Maximum : 4 channels, non-isolated input
Installation environmentOperation temperature : 0-40°C (32°F to 104°F), relative humidity : 85% or less
Temperature and pressure compensationWith
Sampling pump and filterInternal
Power supplyAC 100-240 V±10% (max. voltage: AC 250 V) 50/60 Hz, consumption 140 W
Dimensions, weight430 (W) x 568 (D) x 221 (H) mm, Approx. 18 kg
ComplianceCE, UKCA, KC, FCC, China RoHS

*1 : For ranges less than 2 ppm   *2 : Digital filter
・If there is other measurement range requirement than shown above, please consult HORIBA
・Modbus is a trademark of Schneider Electric USA Inc.


■ Dimensional Outline (Unit: mm)


■ Rear Panel Configuration

1. Exhaust                                    6. I/O terminal block
2. Calibration gas inlet (option)      7. USB flash drive connector
3. Sample gas inlet                        8. Ethernet connector
4. Guide label                                9. RS-232C connector
5. AC power connector


■ Flow Sheet

■ Options

▪ I/O terminal block (Analog input/output, digital input/output)
▪ Pressurized calibration unit  ▪ Flow sensor  ▪ USB flash drive
▪ Mounting parts (rubber feet, brackets and slide rails, brackets for slide rails)

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