Analytical Control Instruments GmbH (ACI)

Model SPID2 - Stationary Photoionization Detector

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The Stationary Photoionization Detector SPID2 is a continuously measuring detector for volatile organic compounds (VOCs) with an ionization potential less than 10.6 eV. The use of new technologies for the excitation source and the sensor allows a high stability of measurement and longer maintenance intervals. An integrated active carbon filter and the circuit sampling an automatic fresh air setup and automatic calibration are controlled.

The unit is designed and approved for use in explosive atmospheres.

The SPID2 uses a high stable hollow cathode lamp with an energy of 10.6 eV as ionization source. This lamp provides with its ceramic discharge channel a highly stable UV output and a lifetime of 8,000 h (typically 15,000 hours and more). The special design of the sensor in conjunction with automatic feeding of pollutant-free air through an activated carbon filter results in longer maintenance intervals.

The detector provides an analog (4-20 mA) output to represent the linearized and compensated measurement result in different scaling and digital (RS485-MODBUS) output which supports reading measurements and diagnostic results. The SPID2 is equipped with a graphical back-lighted display and high brightness Led’s for normal operations, failures and alarm conditions. The intuitive graphical menu guide and a non – intrusive magnetic key interface make it easy to use. 

Key Features

  • extended measurement range of up to 0 … 2,000 ppm* (isobutylene in air)
  • PID signal linearization
  • Temperature and humidity compensation
  • Long life hollow cathode lamp (10.6 eV)
  • Automatic fresh air setup feature
  • Digital Output RS-485 (MODBUS Protocol)
  • Analog Output 4 … 20 mA
  • Operation at 9 … 36 VDC
  • 3 x Relay Outputs for Signalization
  • ATEX/IECEx Gas II 2G Ex d IIC T6 Gb
    EMC directive 2004/108/EC

*optional Low Range (0 … 20 ppm) or Standard Range (0 … 100 ppm)

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