Air Pollution Multigas Calibrator

Multigas Calibrator for AP Analyzers

Dilution of gases with high accuracy and precision requires high quality MFC’s, especially for high dilution ratios and ranges. Consequently HORIBA’s APMC-370 is equipped with digital MFC’s. These MFC’s are factory calibrated, optional also with a special Polynomial Calibration. HORIBA Europe‘s APMC-370 is designed to calibrate gas analyzers manually, remotely controlled or automatically. It is installed in air pollution monitoring stations for quality assurance in the laboratory and also in the production of gas analyzers.

A special feature of HORIBA’s APMC-370 is the big size touch screen panel, for ease of operation. Characteristic of the operation of HORIBA’s APMC-370 is the intuitive, simple and user friendly menu (for instance control of flow rate: µg/m³, mg/m³, ppb, ppm, automatic cycles etc.) Via the touch screen it is e.g. possible to enter span gas concentrations or to start automatic routines like multi point calibration cycles.

Routine sequences like calculating and adjusting span gas concentrations as well as complex flow patterns for multi point calibration cycles can be stored and easily activated. All functions are controlled by an internal CPU with a state-of-the-art 32-bit operating system. This internal microprocessor continuously calculates and displays the final gas concentrations in the selected units (µg/m³, mg/m³, ppb or ppm). Adjustment, monitoring and regulation of flow rates are done fully automatically. These cycles are programmed in the unit’s memory, thus time spent setting up calibrations on-site is minimized.

All critical operational parameters are monitored; any failure message will be displayed and transmitted via the interfaces. Integrated data logger: During multi point calibration cycles, the span gas concentrations switch automatically with the integrated data logger stores storing continuously the data of the connected gas analyzers. Afterwards data can be transferred to a standard browser via Ethernet connection for further evaluation.

HORIBA Europe’s APMC-370 is a modular system and can be adapted and upgraded any time to accommodate most of customer’s requests.



Division: Ambient
Manufacturing Company: HORIBA Europe GmbH
  • Fullfills the requirements of the latest EN-Norms especially in respect to the linearity check
  • Exceeds the US EPA requirements
  • Measurement methods according to international standards
  • Microprocessor controlled with touch screen LCD display
  • Precision of span gas concentration : better than 1%
  • Linearity of span gas concentration : better than 1%
  • Multipoint Calibration : 8 individually adjustable cycles, each with up to 20 calibration points
  • Each calibration cycle runs also automatically
  • Both 19” rack mounted version or Portable version
  • Options:
    1. Additional mass flow controllers ( max. 8 )
    2. Ozone oven for the calibration of Ozone analyzers and / or Gas Phase Titration (GPT)
    3. Internal zero gas calibration system
    4. Permeation oven



Principle of test gas production

via dilution


<±2% reproducibility

Optional: O3 generation

Internal O3 via a UV tube in a thermostatically controlled enclosure
Maximum concentration ±500ppb at 1l/min 


From 40°C to 75°C adjustable
Preset 70°C for UV chamber


via PD controller with PT100 sensor



Setting the target temperature / optional

via HMI (Human Machine Interface)

Display of actual temperature / optional

On the HMI

Gas flow control calibration gas

1x Digital Thermal Mass Flow Controller (MFC) for standard flow
Optional: 2x Digital Thermal MFCs for dynamic flow

Gas flow control dilution air (zero gas)

1x Digital Thermal MFC

Accuracy of the MFC

± 0,8% of current value plus ± 0,2% of FS

Reproducibility of MFC

<0,2% of reading

Pressure sensitivity

0,1% /bar, typical for N2

Inlet pressure


Flow range calibration gas

5-50ml/min and 25-250ml/min

Flow range zero gas


Control time for 98% value at maximum set point jump

3 to 5 seconds

Stability control


Warm-up time for best result


Flow display

via HMI


19" Rack, 3HU

Display / Operation

via HMI
Touch sensitive LCD screen on the front panel (640x480 pixels)

No. of Inlets

Depending on the configurtion, 1x to 8x max.

Test gas cylinder inlet connection

Swagelok 3mm

Test gas outlet connection

6mm screw PVDF

Zero gas connection

6mm screw PVDF

Power supply

110-230V, 50-60Hz


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