Stationary Photoionization Detector SPID2

Stationary Detector for VOCs

The Stationary Photoionization Detector SPID3 is a continuously measuring detector for volatile organic compounds (VOCs) with an ionization potential < 10.6 eV. The use of new technologies for the light source and the sensor enables a high stability of the measurement and longer maintenance intervals. Automatic purging and automatic calibration are controlled via an integrated activated carbon filter and the sampling circuit. The device is designed for operation in potentially 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.

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Extended measuring range

A new sensor unit allows three staggered measuring ranges from 20 ppm up to 2 000 ppm (isobutene) with high resolution at low concentrations.

Easy user interface

A graphic display with intuitive user guidance, clear text instructions and step-by-step configuration support the ease of use.

High performance PID lamp

The ionisation source is a hollow cathode lamp with an energy of 10.6 eV. The Ceramic Discharge Channel ensures high stability and a longer lifetime of up to 15 000 hours and more.

Extended service interval

The high stability of the lamp and 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.

Simple calibration

Even in heavy environment, only one calibration gas is required for the simple menu driven two-point calibration. The applied active carbon filter provides the zero point.

Automatic fresh air setup

For testing and adjusting the zero-point, pollutant-free air is applied via the activated carbon filter periodically through the gas path.

Flexible connections

A wide range of supply voltage, a configurable current loop output, alarm and error relays, a RS485 interface with MODBUS facilitate integration into your system.

Temperature / humidity compensation

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

IECEx / ATEX certification

The SPID2 fulfils the requirements for use in potentially explosive atmospheres and has the appropriate certifications in accordance with ATEX and IECEx.

Technical Data

Detector principle	VUV-Photoionization with 10.6 eV hollow cathode lamp with Ceramic Discharge Channel technology (optional wit 11,8eV lamp)
Detection ranges	0 … 100 ppm Isobutene * 0 … 20 ppm Isobutene * 0 … 2 000 ppm Isobutene *
Display range	0 … 20 000 ppm, depending on response factor of detected substance
Lower detection limit	typical 0.01 ppm *
Display resolution	Dynamic up to 0.01 ppm
Response time	T90 < 10 s *
Signal integrity	Up to 100 ppm typical > 98 % * Up to 2 000 ppm typical > 95 % *
Influence of humidity	Humidity and temperature compensation at 0 ... 50 °C and 0 … 90 % rH residual effect less than < 10 % FS
Operating conditions	-10 … 55 °C 0 … 95 % rH, non-condensing
Storage conditions	-20 … 60 °C 0 … 95 % rH, non-condensing
Gas sampling	Integrated diaphragm pump (about 250 ml/min) Sample inlet with dust and water protection filter
PID lamp life time	10,6eV: Min. 8 000 hours, typical more than 15 000 h 11,8eV: 4 months from date of delivery
Alarms	2 adjustable alarm levels
Power supply	9 … 36 VDC, max. 4 W, recommended 24 VDC
Signalisation	2 x LED (red) for alarms, 1 x LED (multicolour) for status
Relays	3 SPDT 30 V / 2 A (surge current), 2 x for alarms, 1 x for failure
Analog output	Current loop, 4 … 20 mA and 0 … 5 mA
Digital interface	RS485 (MODBUS)
Calibration	Automatically two point calibration Zero gas via activated char coal filter, span gas vie sample inlet
Response factors	Selectable built-in response factors, changeable via remote service program
User interface	Graphical display with backlight, magnetic keys
Dimension, weight	200 mm x 370 mm x 133 mm (L x B x H), about 2200 g
Ingress Protection	IP64, Sample inlet with dust and water protection filter
Warranty	2 years, except for components in gas path and wearing parts
Approvals	ATEX/IECEx Gas II 2G Ex db IIC T6 Gb -40 °C ≤ Ta ≤ +60 °C EMC directive 2014/30/EU
	* The indicated values were obtained under standardized conditions with 10,6eV lamp. Test gas was isobutene in synthetic air.