Smoke Opacity Monitor For Monitoring Marine Emissions

SM-202M

The SM-202M uses the single pass light transmission measurement technique, with Transmitter/Receiver arrangement. A light beam emitted from the Transmitter passes across the stack to a Receiver, which measures the intensity of the received light. Increased smoke density in the stack gas attenuates the transmitted light and causes the intensity of the received light to fall. This reduction in intensity is measured and presented as % opacity. The higher the level of smoke present, the more light lost and therefore, the greater the opacity.

Optional accessories

• Mounting flange installation kit.
• Laser alignment tool to assist with installation.
• Air purge blower kit (110 Vac / 230 Vac / 415 Vac).
• Compressed air purge kit.
• Reference filters for routine calibration check of the instrument.

Features :

• In situ measurement directly in exhaust gas flow.
• Measurement reading as % opacity, smoke density as mg/m³ or Ringelmann.
• Modulated red LED source for long lifetime stability and immunity to ambient light.
• Rugged 316 stainless steel construction.
• ‘Intelligent’ sensor so no requriement for a local control unit.
• Panel mounting Operator Interface enabling local monitoring and control of the instrument.
• Choice of interface options enabling easy integration into ship’s control system.

Benefits

• Excellent reliability record with more than 2000 instruments installed on ships worldwide.
• Simple to install, commission and operate.
• Easy to set-up via local Operator Interface.
• Rugged design with no moving parts so low maintenance.
• Latched head and lid design to enable ease of access for installation and maintenance.

Specification

Measurement Performance

No.	Parameter	Units	Min	Max	Comment
1	Path Length (flange to flange)	m	0.5	5	Flange-to-flange separation
2	Measuring Range – Transmission Opacity Smoke Density Ringelmann	% mg/m3	0 0 0 0	1.000 100 1000 5	The displayed units and measurement range can be user selected to suit requirements Other measurement units also available
3	Display Resolution – Transmission Opacity Smoke Density Ringelmann	% mg/m3		0.001 0.1 0.1 1
4	Accuracy – Opacity	%	-2	+2
5	Damping	s	1	999	Default setting is 10s
6	Drift with Temperature	%	-2	+2	Over operating range
7	Operating Wavelength	nm	620	640	Red LED

Power & Air Requirements

No.	Parameter	Units	Min	Max	Comment
8	Voltage	Vac	105	240	50/60 Hz
9	Nominal Current Consumption	A		1.0
10	Power Up Current Consumption	A		1.0
12	Air Supply Volume Flow	L/min	50	200	To each air-purge body
13	Air Supply Fitting				1” BSP threaded aperture in each air-purge body

Cable and Wire

No.	Parameter	Units	Min	Max	Comment
14	Cable type – TX/TRX Interconnection	cores	6		Screened multi-core, such as Belden 9873
15	Cable type – OI/TRX Interconnection	cores	4		Screened multi-core, such as Belden 9873
16	Wire Size at Terminal Connections	AWG	20	14