MONITORS (Flow, Hazardous Zone, Powder, Opacity, Gas Analyzer)

A range of products are available to monitor stack velocity in m/sec, dust concentration in mg/m³ , mass and emissions in Kg/hr or metric tons per year.   Velocity coupled with concentration enables mass emissions to be calculated and given as an output from ONE specific instrument.  

Model: WM-MON-PCS-002

Products include those certified to German TUV BlmSchV 13 and 17 standards, UK MCERTS Class 4 standards (ISO 10155) and calibrateable but non-certified monitors.   All stack monitors are calibrated to an iso-kinetic sample and include zero, span and system self-checks.   Both Electrodynamic and Dynamic Opacity products are available to suit different process requirements.   Also available are single and multi-channel instruments as well as hazardous zone monitors approved to Cenelec, UL, CSA and BVS standards for gas and dust zones. 

Optional extras include remote calibration, onboard data logging, graphics display, broken bag prediction, normalization to oxygen, full data reporting and analysis and patented insulated probes for conductive dust, humid and wet applications.

Ranges of powder flow monitors are available which include mass flow trending, flow/no flow, and powder velocity instruments.   We use non-intrusive sensors for hygienic and non-disturbed flow applications for both concentration and velocity of powders in pneumatic transfer systems, gravity feed systems, hopper and silo filling as well as other powder or solids transfer lines.   These monitoring techniques are suitable for Lean and Dune phase conveying applications, as well as spray drier efficiency monitoring.

A range of products are available to monitor the ambient level of particulates, including PM-2.5 and PM-10 for workplace, machine tool, respiratory considerations and oil mist monitoring.   Large volume air sampling systems for larger area particulate monitoring, e.g. for header houses, silos and loading bays.  

Model: WM-MON-EMS-001

High Performance Opacity Monitoring System with Double-Pass Transmissometer does not have to mean complicated -This Model  uses field proven and time tested optics and circuitry that is simple yet accurate. Each monitor and all its components are of the highest quality, pre-tested at the factory to your site specifications. The simple to follow instructions will have your monitor ready for service in hours after mechanical and electrical installation have been completed.

EMS has taken the approach to design equipment with accuracy, maintenance and serviceability as the most important features. The EMS 1304 Opacity monitor is designed with state of the art modular packaging with serviceability in mind. A built-in TTL (through-the-lens) alignment system. The alignment target can be viewed through a window on the transceiver. Adjustments to changes in alignment are provide by a 3 point alignment system which is integral to the air plenum. This insures optimum reliability while enabling the system to be easily serviced and maintained in the field by plant service personnel.
User Friendly

Model: WM-MON-EMS-003

Large numeric and letter display show legends (programmable in English as well as other languages) for the values of user defined variables. Dual five inch tall bargraphs are used for instantaneous and average opacity. A third bargraph is dedicated to window dirt accumulation. Tactile feedback membrane push buttons allow operator interface through clearly defined legends with minimum number of keystrokes. The control unit performs all vital computations with resolution of 0.1% opacity (1mg/M3). EMS Model 1304 can provide an output correlated to either stack exit opacity or mg/m3 . State of the art circuitry eliminates calibration problems due to component aging, temperature and line variations and light source aging. Outputs for recording or control are in a 4-20mA format with selectable ranges and averaging times. Display and outputs of alarms for opacity and fault diagnostics are also provided.
Service Module

Model: WM-MONEMS-004

The service module is used to pass signals to and from the transceiver and control unit, display opacity via digital meter, initiate maintenance zero and span cycles and insertion of external current meter in the transceiver to control unit 4-20mA loop. The service module is very useful for trouble shooting or during EPA audits as the correlated opacity can be displayed on the DPM. This feature eliminates the necessity for a second person and sometimes difficult communication between the control unit and the sensor locations.
 

Standard features:

• Digital display, Alphanumeric Display for variables
• Bar graphs for instant and average opacity and one for cal drift
• EPA approved zero/span calibration technique
• Communications: Modbus (RS-485 )
• Stack exit correlation
• Sensor location service module with digital display
• Insensitive to ambient light
• Double pass optical system
• Thru the lens (TTL) alignment
• Light source rated for 5 years
• Electronic modulated light source
• Averager
• Two Analog outputs
• Calibration cycle control
• System & fault diagnostics
• Measures from 3 to 53 Ft. (1-16M)

is designed for Opacity applications that require on-line calibration. A manually operated zero & span optical device is provided to calibrate the system without shutting down the process.

Model: WM-MON-EMS-002

A High performance Opacity Monitoring System with Double-Pass Transmissometer

The stack mounting transmissometer sensor system consists of an optical transceiver mounted on one side of the stack and a retroreflector mounted on the other. The main light source is electronically modulated making it insensitive to ambient light effect and projects a collimated beam of light which is split into a reference beam and a measurement beam. The ratio-measurement technique provides continuous automatic compensation for variations in light source intensity to ensure prolonged instrument accuracy and stability.
 

The measurement beam is projected across the stack to a retroreflector which reflects it back across the stack to the measurement detector. The output of the measurement and reference detectors are transmitted to the control room mounted monitoring unit where all output signals are analyzed.
Manual On-Line zero and span calibration check

An on-line reflector is supplied with each Model 1302 system. This reflector is calibrated to the clear stack or duct condition and locked in place and each reflector is serial numbered to match the system. A slot is provided for the span filter to check the up scale calibration.
Swing Away Sensor

The swing away sensor make cleaning the windows a breeze and for on-line testing. Both sensor have alignment pins to assure no change in alignment after the sensor have been open and closed. Large heavy duty latches make for a air and water tight seal. The sensors are are attached to the air plenum by two drop on pivot pins. This makes for easy installation and should service ever be required easy removal, just swing open and lift off the pivot pins.
Alignment system:

The Model 1302 includes a built-in TTL (through-the-lens) alignment system. The alignment target can be viewed through a window on the transceiver. Adjustments to changes in alignment are provide by a 3 point alignment system which is integral to the air plenum.
 

Model: WM-MON-EMS-005

A High performance Dust/Opacity Monitoring System with Single-Pass Transmissometer

The sensor system consists of an optical transmitter mounted on one side of the stack and a detector mounted on the other. The light source is electronically modulated making it insensitive to ambient light effect and projects a collimated beam of light. The 4-20mA output range is 0-100% Opacity and can be connected to a number of devices to control or display the opacity.
 

Cleaning the optic windows are a breeze. Both sensor have alignment pins to assure no change in alignment after the sensor have been open for cleaning. Large heavy duty latches make for a air and water tight seal. Clean purge air can be connected to the inlet of the mounting flange provided to keep the windows clean for long periods of time.
Applications

Pipe duct of stacks from 1 to 46 inches can be measured. Typical uses are for bag houses, exhaust fan control, ideal for meeting Title V opacity (smoke) regulations soon to be enacted, oven exhaust, diesel test stand exhaust, duct fire alarm, multi-point systems and more.
This Dust/Opacity monitor comes standard with the following features:

• Small and light weight.
• No moving part.
• Beam Uniformity - Multiple lens condenser optical system assures uniform radiation for improved accuracy.
• Single Pass Measurement - High sensitivity, freedom from errors due to practical or wall reflections.
• The solid-state light modulation system eliminates interference due to ambient light.
• 4-20mA output.
• Air plenum - Accepts plant air.