DSL-220M
Smoke Opacity Monitor for monitoring marine emissions
With Port Authorities around the world increasingly regulating emissions from ships, the DSL-220M Smoke Opacity Monitor is an optical instrument specifically designed to measure the visible opacity of smoke emissions within the marine industry.
DSL-220M
The DSL-220M 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.
Features
- Lloyds Type Approved smoke opacity monitor designed specifically for the marine industry
- In situ measurement directly in exhaust gas flow
- Measurement reading as % Opacity
- Modulated green LED source for long lifetime stability and immunity to ambient light
- ‘Intelligent’ sensor so no requriement for a local control unit
- Choice of interface options enabling easy integration into ship’s control system
- Optional Operator Interface with panel mount configuration
Benefits
- Simple to install, commission and operate with an excellent reliability record
- Rugged design with no moving parts so low maintenance
- Latched head design to enable ease of access to optics for preventative maintenance
- Free utility software for PC based set-up, control and data logging
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 | % | 0.0 | 100.0 | User selectable |
3 | Accuracy | % | -2 | +2 | |
4 | Resolution | % | 0.1 | Display resolution | |
5 | Damping | s | 1 | 60 | Selectable |
6 | Drift with Temperature | % | -2 | +2 | Over any 20°C in the operating range |
7 | Operating Wavelength | nm | 510 | 540 | Green LED |
Power & Air Requirements
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
8 | Voltage | Vdc | +24 | ||
9 | Voltage Tolerance | % | -10 | +10 | |
10 | Nominal Current Consumption | mA | 400 | ||
11 | Power Up Current Consumption | mA | 400 | ||
12 | Purge Air Supply Volume Flow | L/min | 50 | 200 | To each air-purge body |
13 | Purge Air Quality | Suitably filtered, oil free and dry |
Cable and Wire
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
14 | Cable type – TX/RX Interconnection | cores | 6 | Screened multi-core, such as Belden 9873 | |
15 | Cable type – OI/RX Interconnection | cores | 4 | Screened multi-core, such as Belden 9873 | |
16 | Wire Size at Terminal Connections | AWG | 20 | 14 |
Interface Options
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
17 | Serial Comms |
ModBus RTU via RS485 Internal USB (OI), external USB (RX) | |||
18 | Analogue Output (one) | mA | 4 | 20 | Isolated and scalable |
19 | Digital Relay Contacts (two) | A | 0 | 3 | @30Vdc (signal level and data valid) |
Physical
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
20 |
Ingress Protection: - TX/RX Heads OI Panel Mounted |
IP65 IP64 |
For external use From front face of panel when installed | ||
21 | Ambient Operating Temperature | °C | -20 | +55 | Air temperature around the heads |
22 | Operating Humidity | % | 100 | Air humidity around the heads | |
23 | Gas Temperature | °C | +600 |
Heat insulating gaskets included (Higher temperatures on request) | |
24 | Regulatory Compliance |
Lloyds Type Approval ENV1, ENV2, ENV3 as per Test Specification No.1 2002 2014/30/EU (Electromagnetic Radiation) 2006/95/EC (Low Voltage) | |||
25 |
Materials: - TX/RX Heads Air-Purge Bodies OI Panel Mounted |
316 Stainless steel (powder coated) Powder coated cast aluminium (Stainless steel option available) Powder coated steel back-box; aluminium front panel with PU laminate overlay and with nylon cable glands | |||
26 |
Weight: TX or RX head OI Panel Mounted | kg |
2.5 1.3 | plus Air-Purge body | |
27 | Warranty | months | 24 | Return to base warranty. Extensions available |
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