Photoionization ­Detector Module ­PIM CPN

Precise detection of volatile organic compounds integrated in your own product

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The PIM CPN photoionization detector module is an OEM module for detecting volatile organic compounds with an ionization potential of 10.6 eV in the standard version (10.0 eV and 11.8 eV optionally available). With its electronics and microcontroller as well as the combined humidity/temperature sensor, it offers flexible and easy-to-use customization to your measuring system. The module has built-in linearization and temperature/humidity compensation as well as a digital interface. The measuring chamber is equipped with a barometric sensor and a flow sensor for subsequent compensation and gas flow monitoring.

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Product Specification

 

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Extended measuring range

The sensor unit allows an extended measuring range of up to 2 000 ppm
(isobutene) as standard version with high resolution even at low concentrations. A low range version with detection range up to 20 ppm and a high range version with up to 5000 ppm is available as well.

 

High performance PID lamp

The ionization source is a high stable hollow cathode lamp with an energy of 10.6 eV. With its ceramic discharge channel, the stability is improved and a longer service life of up to 15 000 hours and more will achieved. The 11,8eV lamp has a service life of 4000 hours beginning from delivery.

 

Single low volt power supply

Since the high voltage power supply of the PID lamp is integrated, the unit works with a single low voltage power supply.

Temperature / humidity compensation

The integrated humidity / temperature sensor measures in addition to the sensor signal the physical environment data and compensates their influence on the measuring result.

 

Easy connection

Only one electrical plug with power and communication is needed to connect to the module.

 

      

Barometric pressure

One integrated barometric pressure sensor measures continuously at the gas inlet of the measurement chamber.

 

Signal processing

A micro controller handles the measurement and control functions, performs all calculations and provides the final result in digital form. There is no knowledge of the particular operation of the PID sensors required. The unit is connected via a simple UART interface or I2C to target system.

Gas flow monitoring

The integrated pressure sensors measures continuously the pressure drop over the measurement chamber do ensure proper flow.

 

Technical Data

Detector principle      VUV-Photoionization with 10.6 eV (L0) hollow cathode lamp with Ceramic Discharge Channel technology and integrated high voltage supply.
(optional 11.8 eV (L1) and 10.0 eV (L2) lamp available)
Detection ranges                R0 – 0 … 2 000 ppm Isobutene *
R1 – 0 … 20 ppm Isobutene *
R2 – 0 … 5000 ppm Isobutene *
Lower detection limit R0 – typical 0.05 ppm *
R1 – typical 0.005 ppm *
R2 – typical 0.5 ppm
Signal resolution Dynamic up to 0.01 ppm (1 ppb at low range, 0.1 ppm at high range) or
raw precision with 3 digits (5 at low range, 2 at high range)
Response time T90 < 10 s *
Signal integrity Up to 100 ppm typical > 98 % *
Up to 5 000 ppm typical > 95 % *
Influence of humidity
and temperature		 compensated between 0 ... 60 °C and 0 … 90 % rH
residual effect less than < 10 %
Operating conditions -20 … 60 °C
0 … 95 % rH, non-condensing
90 to 110 kPa
Storage conditions -20 … 60 °C
0 … 95 % rH, non-condensing
90 to 110 kPa
Gas flow required 200 … 300 ml/min (monitored)
dust and water protection filter at sample inlet required
PID lamp life time  Min. 8 000 hours, typical more than 15 000 h
Power supply 3.00 VDC to 5.25 VDC
max. 200 mA peak, typical 90 mA @ 3.30 VDC
Digital interface UART TTL (at power supply level)
I2C TTL (at power supply level)
Calibration Two point gas calibration
Dimension, weight 54 mm x 39 mm x 28 mm (L x W x H), about 60 g
Warranty 2 years, except for components in gas path and wearing parts
  * The indicated values were obtained under standardized conditions with 10.6eV lamp.
Test gas was Isobuten in synthetic air.

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