Smart Photoionization Detector Module PIDS3

Smart Photoionization Detector Module PIDS3

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The Smart Photoionization Module PIDS3 is an OEM module to detect volatile organic compounds with an ionization potential < 10.6eV. With its built-in electronics and microcontroller as well as a combined humidity/temperature sensor, it provides a flexible and easy to use adaptation into your measurement system. The module comes with a built-in linearization and temperature/humidity compensation. Built-in barometric pressure sensors offer later compensation and gas flow monitoring. The RS485 interface allows additional flexibility to choose the right interface for industrial and laboratory applications. The optional analogue 4 … 20 mA output represents the linearized and compensated concentration value in different scaling. The module is available in different measurement ranges, with optional included pump and 4 … 20 mA output and MODBUS.

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Product Specification

 

New
Extended measuring range

A new sensor unit allows an extended measuring range of up to 2 000 ppm (isobutene) with high resolution even at low concentrations. (20 ppm and 5000 ppm measurement range also available)

 

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.

Wide power supply range

Since the power supply of the PID lamp is integrated, the unit works with a wide input range power supply.

Flexible connections

The galvanic isolated RS485 interface supports reading measurement,  diagnostic results, remote calibration and configuration. The RS485 interface allows additional flexibility to choose the right interface for industrial and laboratory applications. The optional analog 4 .. 20 mA output represents the linearized and compensated concentration value in different scaling.

 

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.

      

Barometric pressure

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

Signal processing

A microcontroller handles the measurement and control functions, performs all calculations and provides the result. There is no knowledge of the particular operation of the PID sensors required.

Gas flow monitoring

The integrated pressure sensors measures continuously the pressure drop over the measurement chamber do ensure proper flow. (a version with integrated pump is available)

 

 

 

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  (-10 … +50 °C with integrated pump)
Storage conditions -20 … 60 °C
0 … 95 % rH, non-condensing
90 to 110 kPa
Gas flow Required 200 … 300 ml/min,
Sample inlet with dust and water protection filter
Optional with integrated pump available
Gas connection Viton tube 1/8” OD … 1/16” ID (recommended)
Dust and water protection filter required
PID lamp life time Min. 8 000 hours, typical more than 15 000 hours
11.8 eV: 4 months from date of delivery
Handling Device configuration via RS485 UART
Digital interface RS485 (UART or MODBUS) galvanic isolated 
Analog interface Current loop, 4 … 20 mA (optional)
optional 3 SPDT 30 V / 2 A Relays (surge current)
Power supply 10.0 … 28.0 VDC, approx. 1.5 W at 24.0 V
Cable gland Cable gland for cable diameter 5 mm … 9 mm
Screw connection inside
Conductor cross section solid max. 1.5 mm²
Conductor cross section stranded max. 1.5 mm²
Calibration  Two point calibratio
Ingress Protection IP65 enclosure only, IP53 in operation due to gas inlet requirement
Dimension, weight 191 mm x 133 mm x 60 mm (L x W x H), about 1000 g
Warranty 2 years, except for components in gas path and wearing parts
  * The indicated values were obtained under standardized conditions.
Test gas was isobutene in synthetic air.

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