DSL-340 MkIII
Double Pass Dust Monitor for monitoring dust emissions using DDP
The DSL-340 Dust Monitor is an optical instrument designed to measure the concentration of dust or particulate matter in exhaust gas passing through a duct, stack or flue.
DSL-340 MkIII
The DSL-340 uses the innovative Dynamic Detection Principle (DDP) which measures fluctuations in the intensity of a light beam, using a folded beam Transceiver/Reflector arrangement. Increased dust or particulate density in the stack causes the amplitude of these fluctuations to increase. When calibrated against standard reference measurements, the amplitude of this signal relates directly to the dust concentration in the stack and this can be presented as a reading in mg/m³.
Optional accessories
- Operator interface (OI)
- 90-260 Vac model available
- 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
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Innovative Dynamic Detection Principle (DDP) measurement technique
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Immune to gradual reductions in absolute intensity of the light signal so less susceptible to drift
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Measurement reading as mg/m³ (when calibrated against standard reference measurements)
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Internal electronic calibration check capability
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Rugged 316 stainless steel construction
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Choice of interface options enabling easy integration
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Free utility software for PC based set-up, control and data logging
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Optional Operator Interface with different mounting configurations
Benefits
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Significantly less susceptible to drift than standard opacity monitors
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Better accuracy over shorter path lengths, i.e. smaller duct diameter
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Simple to install, commission and operate with an excellent reliability record
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Rugged design with no moving parts so low maintenance
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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 | 10 | Flange-to-flange separation |
2 | Measuring Range | mg/m3 | 0.0 | 1000.0 | User selectable |
3 | Accuracy | % | -2 | +2 | Relative to maximum range |
4 | Resolution | mg/m3 | 0.1 | Display resolution | |
5 | Damping | s | 1 | 60 | Selectable |
6 | Drift with Temperature | % | -0.5 | +0.5 | Over the operating range |
7 | Operating Wavelength | nm | 510 | 540 | Green LED |
Power & Air Requirements
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
8 | Voltage | Vdc | +24 | Optional 90-260 Vac PSU available | |
9 | Voltage Tolerance | % | -10 | +10 | |
10 | Nominal Current Consumption | mA | 500 | ||
11 | Power Up Current Consumption | mA | 500 | ||
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 – OI/TRX Interconnection | cores | 4 | Screened multi-core, such as Belden 9873 | |
15 | Wire Size at Terminal Connections | AWG | 20 | 14 |
Interface Options
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
16 | Serial Comms |
ModBus RTU via RS485 (OI or TRX) Internal USB (OI), external USB (TRX) | |||
17 | Analogue Output (one) | mA | 4 | 20 | Isolated and scalable |
18 | Digital Relay Contacts (two) | A | 0 | 3 | @30Vdc (signal level and data valid) |
Physical
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
19 | Ingress Protection: - Heads | IP65 | For external use | ||
20 |
Ingress Protection: OI Wall Mounted OI Panel Mounted |
IP65 IP64 |
Hinged door and terminal compartment shut 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 |
US EPA PS-11 compliant 2014/30/EU (Electromagnetic Radiation) 2014/35/EU (Low Voltage) | |||
25 | Materials: - Heads | AISI/SAE 316L Stainless steel - Powder coated | |||
26 | Materials: - Air-Purge Bodies | Powder coated cast aluminium or stainless steel for demanding installations | |||
27 |
Materials: - OI Wall Mounted - OI Panel Mounted | UL rated polycarbonate enclosure; aluminium front panel with PU laminate overlay and with nylon cable glands | |||
Powder coated steel back-box; aluminium front panel with PU laminate overlay and with nylon cable glands | |||||
28 | Weight | kg | 2.5 | TX or Reflector head plus Aluminium Air-Purge body | |
30 |
Weight: - OI Wall Mounted - OI Panel Mounted | kg |
1.3 1.3 | ||
31 | Warranty | months | 24 | Return to base warranty. Extensions available |
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