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

Innovative Dynamic Detection Principle (DDP) measurement technique
Immune to gradual reductions in absolute intensity of the light signal so less susceptible to drift
Measurement reading as mg/m³ (when calibrated against standard reference measurements)
Internal electronic calibration check capability
Rugged 316 stainless steel construction
Choice of interface options enabling easy integration
Free utility software for PC based set-up, control and data logging
Optional Operator Interface with different mounting configurations

Benefits

Significantly less susceptible to drift than standard opacity monitors
Better accuracy over shorter path lengths, i.e. smaller duct diameter
Simple to install, commission and operate with an excellent reliability record
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	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
27	Materials: - OI Wall Mounted - OI Panel Mounted	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

ASK A QUESTION

For further information on any of our products, please complete our contact form and a member of staff will respond as soon as possible.

Altenatively call us on +44 (0)1280 850521

Satisfied clients

Don’t just take our word for it, read what some of our clients are saying about our products.

"We have worked with DynOptic for several years. The equipment is sensibly priced, reliable and very easy to commission and service. The after-sales backup is excellent."

"We have used DynOptic dust monitors over the last 10 years. The instruments have been working reliably on our process over this time and furthermore correlate well with iso-kinetic samples."

"We have used DynOptic equipment in multiple applications. The instruments are operating to the Customer’s complete satisfaction, fully compliant to their technical specification."

Product Applications

Below are our core product applications, simply select them for more information about suitable monitors

Opacity

Dynoptic opacity monitors use the light transmission technique to measure the visible opacity of exhaust gas in a duct, stack or flue.

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Particulate

PArticulate

Particulate monitoring requires the measurement of the mass concentration of particulate matter in stack emissions to atmosphere.

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Dust

Dynoptic dust monitors use DDP (optical scintillation which measures the dynamic fluctuation in light transmission as dust particles move through a light beam.

LEARN MORE

DSL-340 MkIII

Double Pass Dust Monitor for monitoring dust emissions using DDP

DSL-340 MkIII

Optional accessories

Features

Benefits

Specification

Download brochures

ASK A QUESTION

Satisfied clients

Product Applications

Opacity

Opacity

Particulate

PArticulate

Dust

Dust

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