CANADA UNISEARCH founded in 1980

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1 CANADA UNISEARCH founded in 1980 Piergiorgio Viglino Sales and Service Manager Europe and the Middle East

4 microns) CO, CO2, HF, HCl, H2O, H2S, NH3,

Differential Optical Absorption Spectrometry

7 microns (200 to 700 nm) SO2, NO, NO2, NH3,

2 Tunable Diode Laser (TDL) Absorption Spectrometry LasIR TM TDL near IR (0.7 to 2.4 microns) CO, CO2, HF, HCl, H2O, H2S, NH3, CH4, C2H2, C2H4, C2H6, HCN, HDO, D2O Differential Optical Absorption Spectrometry DOAS Near UV to Visible to 0.7 microns (200 to 700 nm) SO2, NO, NO2, NH3, CS2, O3, Cl2, ClO2, HCHO, Benzene, Toluene, Xylene, Styrene, Napthalene

3 High sensitivity High sensitivity RoHS-Compliant Tunable Diode Laser Based Gas Analyzers Benzene, Toluene, Xylene, Styrene, Formaldehyde, CS 2 D 2 O/HDO Cl 2 HF CO CO 2 HCl CH 4 C 2000 nm

4 HCl CO CO 2 NH3 H 2 O HF O 2 NO 2 SO 2 NO Near Infrared Near Infrared Visible Near UV ~400 nm CO 2 CO H 2 O ~7 nm ~0.02 nm

5 ADVANTAGES of TDL Measurements virtually interference-free from other gases and particles Fast, accurate measurements <0.1 sec In-situ, cross-stack, open path, extractive Possibility of multiple location measurement with a single analyzer Virtually maintenance-free with no consumables (some in-situ applications require purge air when gas has particulates or moisture) Light-weight (2-5 kg) and easy to operate Field calibration-free (Audit option available)

6 Detector signal Emitter Optics Detector (When gas is present, some light is absorbed by the gas)

7 Fiber-coupled Diode Laser

Optical Light Source based Gas Analyzers

8 Optical Light Source based Gas Analyzers RoHS-Compliant Tunable Diode Laser Based Gas Analyzers Tunable Diode Lasers (TDL)? UNISEARCH uses TO-CAN PACKAGE OR 14-PIN BUTTERFLY PACKAGE Analyzer must be located at the measurement location Analyzer can be located far away from the measurement location

9 STACK TDL Gas Analyzer

10 TRANSMITTER OPTICS RECEIVER OPTICS Purge Air STACK Purge Air For fiber-coupled laser, the laser is located inside the analyzer in the control room Armored Fiber Cable Coax Cable or Armored Fiber Cable

11 Unisearch RoHS-compliant, TUV-certified Table-top and Rack-mount Gas Analyzers Portable 1 & 2 channels 1, 2, 4, 8, 12 & 16 channels

12 Unisearch gas analyzer do not require field calibration. Audit Modules containing permanently sealed gas cells are available to check the validity of the measurements. Therefore, compressed gas cylinders are not required to check the performance or validity of the analyzer.

to check the validity of the measurements.

13 Unisearch gas analyzer do not require field calibration. Audit Modules containing permanently sealed gas cells are available to check the validity of the measurements. Therefore, compressed gas cylinders are not required to check the performance or validity of the analyzer.

14 Fiber cable Audit module Coax cable Analyzer Offline Audit with Audit Module

15 Fiber cable Fiber cable Audit module Coax cable Analyzer Inline Audit with Audit Module

17 Single pass Configuration Emitter Optics in NEMA Enclosure Receiver Optics in NEMA Enclosure Coax Cable Junction Box Fiber Cable

Filters Armored fiber bundle 230 m 9 8 7 6 5 4 3 2 1 Configuration being used to

Laptop computer Coax cable 380 m Armoured fiber bundle 380 m Armored fiber bundle

18 Filters Armored fiber bundle 230 m Configuration being used to measure HF gas in Maaden Aluminum Smelter in Saudi Arabia Coax cable GTC Stack Laptop computer Coax cable 380 m Armoured fiber bundle 380 m Armored fiber bundle 255 m Filters LAS-RM1210-HF12 Coax cable LAS-RM1210-HF12

19 Gas Measurement in Explosion-proof Area

20 Two different multi-pass gas cells available (5 to 30 m) & (55 to75 m) COAXIAL CABLE COAXIAL CABLE FIBER CABLE FIBER CABLE 5-30 m gas cell m gas cell

21 Pseudo In-situ Measurement System

22 Open Path Telescopes

23 HF Alkylation Unit

24 HF Leakage Measurement in an Oil Refinery Alkylation Room Path length = 120 m

25 TDL in Aluminum Smelter (Potroom)

26 HF Measurements In Stacks RoHS-Compliant Tunable Diode Laser Based Gas Analyzers

27 Clean Air RoHS-Compliant Tunable Diode Laser Based Gas Analyzers Cleaning Flue Gas Filter Bag house Bags containing Alumina powder OUTLET INLET

28 Path length 310 meters

29 NH 3 / Urea NH 3 NO X NO X H 2 O NH 3 NO X NH 3 N 2 Dirty Gas NO X NO X NH 3 NO X NH 3 NH 3 DeNOx Catalyst H 2 O N 2 NH 3 Slip NO X NO X H 2 O NH 3 NH 3 N 2 4NO + 4NH 3 2NO 2 + 4NH 3 4N 2 + 6H 2 O 3N 2 + 6H 2 O

31 Increase in Injection of Urea

32 O 2 To Vacuum Pump Ar injection Basic Oxygen Furnace Pig Iron Steel 4-6% C <2% Vacuum Degassing HC Steel ULC Steel <2% C <0.003% Measures CO and CO 2

34 Early Fire Detection in Tobacco Processing Plant

Optical Light Source based Gas Analyzers RoHS-Compliant Tunable Diode

Philippines Russia China India Taiwan Japan Qatar USA Canada Germany

Netherland UK Slovakia Spain Saudi Arabia Afghanistan Tunisia Mexico

36 Optical Light Source based Gas Analyzers RoHS-Compliant Tunable Diode Laser Based Gas Analyzers Installations: Australia Argentina Indonesia Philippines Russia China India Taiwan Japan Qatar USA Canada Germany France Norway Italy Sweden Poland Denmark Hungary Spain Switzerland Netherland UK Slovakia Spain Saudi Arabia Afghanistan Tunisia Mexico Czech Republic Sweden Malaysia Holland More than 1200 installations worldwide

- HF, HCl, NH 3, CO, CO 2 Nylon, Carbon fibers, Plastics HCN, O2 Waste water treatment - H 2 S Ceramic/Brick - HF, HCl Cement - CO, CO 2, HCl, NH 3, O 2 (SO 2, NO 2

37 Aluminum smelters - HF (CF 4 & C 2 F 6 specialty equipment) Steel Smelters - CO, CO 2, O 2, H 2 O Power Plants - NH 3, H 2 O, CH 4, CO Nickel Smelters - H 2 S, CO, CO 2 (SO 2, NO 2, NO) Copper smelters - NO Gold smelters HCN Petro-chemical - HF, H 2 S Nuclear processing - HF, D 2 O, HDO Chemical plants - HF, H 2 O Incinerators - HF, HCl, NH 3, CO, CO 2 Nylon, Carbon fibers, Plastics HCN, O2 Waste water treatment - H 2 S Ceramic/Brick - HF, HCl Cement - CO, CO 2, HCl, NH 3, O 2 (SO 2, NO 2 ) Landfill - H 2 S, CH 4, NH 3 Tobacco processing - CO, CO 2 (as early fire detection device) Automobile Exhaust CO, CO 2 (HC, NO) Building insulation materials CO

Conclusions 1. TDL technology has definite advantages over other technologies fast, in-situ, interference-free, low maintenance... 2.

38 Conclusions 1. TDL technology has definite advantages over other technologies fast, in-situ, interference-free, low maintenance TDL best suited for process control applications; low downtime 3. Multiplexing remote; multiple locations; cost effective 4. Compact, simple to use 5. Can be designed that requires no on-site calibration 6. Limited number of gases at a time

DOAS Gas Analyzer - Uses broadband light source instead

with a single analyzer - Principle of measurement is

Sulfur Dioxide (SO 2 ) Ammonia (NH 3 ) Benzene (C 6 H 6

) Ozone (O 3 ) Napthalene (C 10 H 8 ) Carbon Disulfide

39 DOAS Gas Analyzer - Uses broadband light source instead of a laser light source - Multiple gases can be measured with a single analyzer - Principle of measurement is same as TDL) Nitric Oxide (NO) Nitrogen Dioxide (NO 2 ) Sulfur Dioxide (SO 2 ) Ammonia (NH 3 ) Benzene (C 6 H 6 ) Toluene (C 7 H 8 ) Xylene (C 8 H 10 ) Styrene (C 8 H 8 ) Ozone (O 3 ) Napthalene (C 10 H 8 ) Carbon Disulfide (CS 2 ) Chlorine (Cl 2 ) Most have ppb to ppm level of detection

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