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Serinus 50 SO2 Analyser

The Serinus 50 Sulphur Dioxide (SO2) analyser delivers precise and reliable performance at excellent value. It uses proven pulsed UV fluorescent radiation technology to measure SO2 in ambient air (LDL <0.3ppb, Range 0-20ppm).


The Serinus range of analysers have been designed using Ecotech's experience and knowledge gained from operating large air quality monitoring networks for more than 35 years. The result, instruments that integrate seamlessly into continuous monitoring networks.


  • US EPA approval (EQSA–0809–188).

  • EN approval TÜV 936/21221977/B.

  • Australian Standard: AS 3580.4.1-2008.

  • Russian approval: 56054-13.

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  • Reliable performance complemented with a two year warranty 

  • Minimise time spent on site performing maintenance through
    superior remote instrument control, diagnostic viewing and calibration

  • Comprehensive data logging and remote viewing of over 200 operational parameters

  • Versatile interfacing through RS232, USB, Bluetooth, analog and digital I/O and optional TCP/IP

  • Easy setup through an intuitive menu system, advanced GUI and a large alphanumeric keypad with tactile keys

  • Instant status indication via illuminated instrument status light buttons on the front panel

  • Removable flash memory stores ~10 years of data, including up to 12 individual parameters and event logs. Operational parameters can also be transferred to memory for easy retrieval

  • Latest firmware updates can easily be installed using the USB flash memory drive

  • Programming, viewing, downloading and emailing of data is made even simpler using Bluetooth connectivity combined with the ‘Ecotech Serinus® Remote’ Android App

  • Built-in digital display measuring values and having function of measuring values transferred to graphical trend display 

  • Enhanced operator safety through the use of 12 VDC internal voltages

  • Reduced cost of spare parts, accessories and consumable items through extensive use of standard components across the Serinus® range

  • Rack slide design makes accessing internal components and removing the analyser from a rack cabinet easy

  • AQMS power usage can be reduced due to the instrument’s low power demand and its ability to operate over a wide temperature range.


Ranges: 0 - 20 ppm (autoranging)
Concentration units: mg/m3, μg/m3, ng/m3, ppm, ppb or ppt 
Noise: < 0.15 ppb
Lower detectable limit: < 0.3 ppb or 0.2 % of concentration whichever is greater
Linearity: < 1 % of full scale
Precision: 0.5 ppb or 0.5 % of reading whichever is greater
Zero drift: 24 hours: < 0.5 ppb 7 days: < 0.5 ppb 
Span drift: 24 hours: < 0.5 % of reading or < 0.5 ppb whichever is greater
Response time: 60 seconds to 95 %
STP reference: 0 °C, 20 °C, 25 °C at 101.3 kPa
Sample flow rate: 725 cc/min
Temperature range: 0 to 40 °C
Operating power: 100 - 240 VAC, 50 - 60 Hz (autoranging) 
Power consumption: 255 VA (max at start-up) 180 VA (nominal)
Dimensions: 429 x 175 x 638 mm
Rack Spacing: 3.5 RU
Weight: 18.1 kg


Inputs/Outputs: 25 pin I/O port

#1 RS232 port (supports all protocols*)
#2 RS232 port (supports all protocols* and multidrop)
USB port (Advanced protocol only)
Bluetooth (Advanced protocol only)
TCP/IP network port (optional, supports all protocols*).

  • 3 x analog outputs (current or voltage), 12 bit resolution user definable range (between two user specified points)
    Current range: 0 - 20 mA, 2 - 20 mA or 4 - 20 mA
    Voltage range: 0 - 5 V, 0 - 10 V (voltage offset of 0 V, 0.25 V or 0.5 V)

  • 3 x analog inputs (scalable), 0 - 5 V, 16 bit resolution

  • 8 x logic level digital control inputs

  • 8 x open collector digital status outputs.

Options & Accessories

Data Logging

• 8 GB removable USB flash memory drive that stores the internal data logger, event log, automatic/manual configuration backup and automatic/manual parameter list save
• Internal data logger (can log up to 12 of 200+ parameters)

• Logger interval (1 second to 24 hours)
• Storage capacity ~ 10 years (set to 1 minute interval).

• TCP/IP Network Port
• Dual Sample (particulate) Filter
• High Pressure Zero (for direct cylinder calibration)
• Internal Zero and Span (for instrument precision checks)
• Internal DC Pump (long life, low power, minimal maintenance)
• Metric Fitting Kit (to connect 6 mm tube to rear ports)
• 19” Rack Mount Kit
• External Pump (240 or 110 VAC)
• Annual Maintenance Kit
• Printed User Manual (a soft copy of the user manual is supplied
on the ACOEM Ecotech resources USB stick with each analyser).

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