Automatic Isokinetic Stack Monitoring System Model PEM-SMS 4

A true iso-kinetic sampling system for an evolved stack emission monitoring experience.

Automatic Stack Monitoring System is a an advanced automatic sampler for sampling of particulate matter, moisture and other pollutants emitted from industrial stcks and ducts. Sampling of particulate matter is carried out under iso-kinetic conditions. It guides the user in the selection of the ideal nozzle size, traverse points and placement of probes.

Available Model : PEM - SMS4

Automatic Isokinetic Stack Monitoring System Model PEM-SMS 4

Ideally designed for stack emission monitoring based on the US EPA methodologies, PEM-SMS-4 Stack Monitoring System is a highly advanced automatic sampler, which facilitates the sampling of particulate matter maintaining iso-kinetic conditions, moisture and gaseous pollutants in stacks and ducts. It is programmable to select the required mode of sampling for particulate, moisture or gaseous sampling. Moisture Content can be evaluated by setting mode of sampling to moisture and sampling for preferably up to half an hour. Gaseous mode allows the samples to be collected in specific adsorbing chemicals for further analysis. The system provides for a constant flow mode for particulates for use in cyclones.

When sampling for particulates the system, software provides a guided operation by ensuring the required parameters are initially entered by the user using the keyboard and display. This includes parameters like gas composition, moisture content (evaluated by SMS4 or manually entered), stack dimensions, barometric pressure and pitot tube coefficient.

The system then recommends the ideal nozzle size, number of traverse points and their distances. Solid state pressure sensors and temperature sensors used in the system measure the various pressure and temperature conditions in stack. It computes the iso-kinetic set point, which is displayed and utilized for continuous control of the sampling flow rate through a proportional control valve.

During the sampling run, the system not only measures stack gas velocity but also continuously computes and regulates the sampling flow rate automatically to comply with iso-kinetic sampling conditions through out the sampling. Stack gas velocity computation is carried out based on the of pitot tube dp, flue gas temperature and gas composition and barometric pressure. In the run mode the display continuously shows the linear velocity, computed iso kinetic flow rate, actual sampling flow rate, elapsed sampling time and volume collected so there is a clear feedback as needed in a true system of how well the iso kinetic conditions are being maintained.

The system is so versatile and user friendly that it eliminates the need for paper, pen or calculator on the field or off the field as all the data is stored in the memory. After entering the initial & final weight of the filter paper through the control module keys, the system computes and allows data transfer and reporting on the particulate matter concentration, volumetric discharge and emission rate of PM from the stack.

Applications :

  • Stack emission monitoring by industries like Chemical, Paint, Cement, Fertilizers, Sugar etc.
  • Stack monitoring in Thermal Power Stations
  • Compliance monitoring services
  • Impact Analysis Evaluations
  • ISO 9001,14001,180001 Audit Compliance
  • Environment Audit Reports
  • Factory Act Compliance
  • Environment Impact Assessments
  • Engineering and Science Colleges, Universities
  • Demos and Operation Trainings.
  • Lab Applications
  • Environmental Impact Studies
  • Fuel efficiency and emission studies.
  • Data Collection and Reporting

Physical Design Highlights :

The automatic stack monitoring system has been designed for easy portability and making the application and usage to be guided and user friendly keeping in mind the difficulties encountered for collecting stack emission samples.

The stack interface consists of various sampling accessories like pitot tube, sampling probes, nozzles and so on.

The electronic control module is a rechargeable battery operated portable and housed in a light weight aluminum easy to carry box. It has a 32 character large LCD module, a ten keys keypad and a micro-controller based control module with internal memory.

The sampling pump interface module consists of a dry rotary mono-block pump with graphite vanes having a free flow greater than 95 LPM and a proportional control valve regulated by the control module for maintaining Iso-kinetic flow.

The impinger module for gaseous sampling mode consists of a thermocole insulated, lightweight, fiber glass cabinet with capacity to accommodate 6 glass impingers. Low temperature is maintained by keeping ice in the module.

An all metal, thermally insulated condenser unit with copper coil is provided for cooling of the sample gas and removal of moisture. A solid state temperature sensor measures gas outlet temperature for on line moisture correction.

Standard accessories include a Pitob assembly of 1 meter length consisting of a “S” type Pitot tube ( marked and engraved), a sampling probe and a thermocouple temperature sensor all mounted together in two blocks along with a Pitob box. A set of interconnection hoses of PU tubes, 3 numbers of 12 mm for sampling and 2 nos. of 6 mm for Pitot connections are also provided along with a, a thimble holder, a set of 3 nozzles and a set of tools.

Salient Features :

  • True Iso-Kinetic Sampling
  • Automatic Computation Of Online Linear Velocity & Iso-Kinetic Flow Rate
  • Automatic Control of Flow to Iso-Kinetic Conditions
  • Ideal Nozzle Size Computation
  • Computation of Number of Traverse Points and Their Distances
  • On-Line Condenser Temperature Measurement & Moisture Correction
  • Automatic Recording of Data
  • Compact, Lightweight, Portable & Battery Operated
  • Standard accessories provided as per method 17 with system add-ons available for other methods

Technical Specifications :

Measured and Displayed Parameters
Stack gas Temperature Ambient to 600 0C or 1200 0C
Pitot Tube ∆p 0 to 200.0 mm WC
Stack gas / orifice inlet pressure 0 to 760 mmHg
Orifice meter ∆p 0 to 200.0 mm WC
Orifice meter Gas Temp. 0 to 60 °C
Cooled Gas outlet Temp. 0 to 55 °C
Computed Parameters
Moisture Concentration 0.1 to 60 %
Stack gas Velocity 0 to 99.9 m / s
Computed Iso-kinetic Flow Rate 10-100 LPM
Actual Sampling Flow Rate 10-100 LPM
Total Volume Collected (STP) 0-999.9 Liters
Gaseous Flow Rate (STP) ~1 to ~2 LPM
Gaseous Volume 0 to 99.9 liters
Total sampling Time 0 to 999 minutes 59 seconds
Leak rate 0 to 9.9 LPM
Other Parameters PM concentration, Volumetric Discharge, Emission Rate, Average Stack Gas Velocity
Parameters Storage For 10 samples
Communication port USB Port for data transfer to pc.
Window based pc software provided on cd
Type of Data Transferred All measured parameters, all computed parameters and all user supplied data
Physical and other characteristics
Pneumatic Connections Push fit unions: 2 Nos. for 6mm OD and 2 Nos. for 12mm OD PU tube
Power From Rechargeable Li-ion battery
External charging adaptor for 110-230 VAC.
Housing High quality, light-weight aluminum box with hinges & lock
Dimensions 350x 280 x 150 mm
Weight 6 kg

Accuracy Specifications

Stack gas velocity ± 1% of FS
Particulate/Moisture Flow rate measurement ± 3% of FS
Stack Temperature measurement ± 2 °C
Gaseous Flow rate measurement ± 1% of reading
Flow rate control ≤ ± 2 LPM

Operating Environment

Temperature 5 to 50 °C
Relative Humidity Upto 95% non condensing

Add-Ons :

Heated Filter Box with Heated Sampling Probes : Mandatory add-on for out of stack filtration as specified in EPA Method 5 and other methods for sampling of particulate matter, SO3, halides, etc.

Dioxin Furan Sampling Equipment : To sample Dioxins and furans as required by certain industries , this add-on combines with the SMS4 and Heated Filter Box to make the system compliant with USEPA Method 23 sampling

Nitrogen Oxides (NOx) Sampling Equipment : Can be used as a stand alone or an add-on for sampling oxides of Nitrogen as per USEPA Method 7 for sampling from stationary sources.

Sulfuric Acid Mist Sampling Equipment : To sample for sulphuric acid (mist and SO3) and sulpher dioxide as required by certain industries , this add-on combines with the SMS4 and Heated Filter Box to make the system compliant with USEPA Method 8 sampling.

Halogen and Halogen Halides Sampling Equipment : To sample for halogen and halogen halides as required by certain industries, this add-on combines with the SMS4 and Heated Filter Box to make the system compliant with USEPA Method 26A sampling.

Metal Emissions Sampling Equipment : To sample for metal emissions as required by certain industries , this add-on combines with the SMS4 and Heated Filter Box to make the system compliant with USEPA Method 29 sampling.

PM10 Sampling Equipment : This add-on consisting of a cyclone with multiple nozzles when used in stack, further filters for particulates of size PM 10 and below using the constant sampling rate procedure as specified by USEPA Method 201A.

PM2.5 Sampling Equipment : This add-on consisting of a cyclone with multiple nozzles when used in stack, further filters for particulates of size PM 2.5 and below using the constant sampling rate procedure as specified by USEPA Method CTM27.

High Temperature PITOB Assembly : Add-on Sampling System (Nozzles, Filter Holder, Sampling Probe, Pitot Tube & Thermocouple made of SS 310, Inconel ) for use in high temperature stacks etc.

Accessories and Consumables :

Pitot Tubes : Modified S-type pitot tube of SS 304 duly calibrated. Standard L = 1 Meter. Other lengths optional.

Sampling Probes : Fabricated from SS 304 tube (ID >15 mm). Standard Length =1 Meter. Other lengths optional.

Nozzles : Various SS Nozzles (⅛”, ¼”, 5/16”, ⅜” & ½” bore) with sharp & tapered outer leading edge.

Stack Thermocouple : K type in SS housing with 3 mtr. Cable. Standard Probe Length = 1 Meter. Other lengths optional.

Filter Holder (for Thimble filters) : Tapered design made from SS 304 / 316 for Cellulose & G/F Thimbles.

Inter Connection Pitot Tubes : 3 Nos. of PU Tubes of 12 mm OD & 2 Nos. PU Tubes of 6 mm OD of each of 3 mtr. length. (Other lengths optional).

Thimble Filters : Whatman Cellulose Thimble Filters Size : 28 mm x 100 mm
Whatman Glass Fibre Thimbles Size : 19 mm x 90 mm

Glass Impinger : 120 mL, 250 mL.

Related Services :

  • Flow Calibration Standard Range2
  • Flow Calibration Standard Range3
  • Pressure Calibration Standard Range2
  • Temperature Calibration Standard Range1
  • Temperature Calibration Standard Range2
  • Temperature Simulation for Thermocouples
  • Timer Calibration