DMTFB Advanced Clamp-on Transit-time Ultrasonic Flow Meter ::: Shanghai Dynameters Tech. Co., Ltd.

The DMTFB wall-mount Clamp-on Ultrasonic Flow meter family provides abundant capabilities for accurate liquid flow measurement from outside of a pipe. It utilizes state-of-the-art technologies on ultrasonic transmission /receiving, digital signal processing and transit-time measurement. The proprietary signal quality tracking and self-adapting technologies allow system to optimally adapt to different pipe materials automatically.
The flow meters of the DMTF family are carefully designed so that their user-interfaces are self-explanatory and their operation is simple and easy. The unique clamp-on fixture design makes the installation very simple and no special skills or tools are required.
Due to the non-invasive nature of the clamp-on technology, there is no pressure drop, no moving parts, no leaks, no risk of contamination, no risk of corrosion, no pressure dependency.

Features:

· Cost effective and versatile.
· High accuracy, better than 1.0% read.
· Noninvasive, no moving parts, no pressure drop, no maintenance.
· Easy and economical installation, no pipe cutting.
· Wide measurement range, 0.03~40ft/s (0.01~12m/s).
· Wide pipe size range, 3/ 4~180 inches (DN 20~4570mm).
· Suitable for all commonly used pipe materials.
· Signal quality tracking and self-adjusting capabilities.
· automatically match transducer to pipe materials.
· Velocity, volumetric and totalized flow display.
· Bi-directional. Totalizer for net, positive and negative flow display.
· Easy to use and set up. Self-explanatory menu-driving programming.
· Rich input and output functionalities.
· Ideal for both clean and opaque liquid flow measurements,
In fact, most any liquid containing less than 5% total suspended solids (TSS) or aeration.

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Download DMTFB Catalogue (907KB)

Applications:

The DMTFB flow meters are ideal for process-control or flow measurement at fixed locations. Their non-invasive nature makes them indispensable in applications such as chemical liquid processing, hygienic process monitoring, high-pressure flow measurement, etc. Benefited from our advanced digital signal processing technology, the flow meter works reliably in both clean and opaque liquid flow. Examples of applicable liquids are:
Water, including hot water, chilled water, city water, sea water, etc.
Secondary sewage, waste treatment, etc.
Oil, including lubricating oil, diesel oil, fuel oil, etc.
Chemicals, including alcohol, acids, etc.
Solvents
Beverage, food and pharmaceutical processors where non-contact is a must.
HVAC, energy measurement system, etc.

Specifications:

Transmitter	Power Supply		10-28 VDC @3VA max.; 115/230 VAC 50/60Hz 15% @6VA max
	Velocity		0.03~40ft/s(0.01~12m/s), bi-directional
	Signal Outputs		Current output:4~20mA Impedance 0~1k ohms, accuracy 0.1%
			OCT output: pulse signal for, flow rate, total flow (positive ,negative and net flow)
	Display		LCD with backlight. 4×16 letters. Display instantaneous flow rate, total flow (positive ,negative and net flow), velocity, time, etc.
	Units		English (U.S.) or metric
	Accuracy		Better than 1.0 % read for velocity above 1.5 ft/s
	Repeatability		Better than 0.5% read
	Response time		0.5s
	Recording		Automatically record the following information: ·The totalizer data of the last 64 days /64 months /64 years; ·The time and corresponding flow rate of the last 64 times of power on and off events. Allow manual or automatic flow loss compensation ·The instrument working status of the last 64 days
	Communication Interface		RS-232, RS-485,Hart&ModBus Protocol Module(optional)
	Data Logging		512M (200,000 event), 16-bit integral DB-9 RS232C Connection can be removed and installed without disconnecting system power
	Enclosure		Protection Class:IP65(NEMA 4X) Explosive Proof Class : EEeXII (for model DMTFB2 only)
Liquids	Liquid Types		Virtually most any liquid containing less than 5% total suspended solids (TSS) or aeration.
	Liquid Temp		(Std) -40 to 482°F [-40 to 250℃]
Pipe	Pipe Size		(Std) 1 to 50 inches [25 to 1250 mm] pipe I.D, 50-180inches (1250- 4570 mm) opt.
	Pipe Material		All metals, most plastics, fiber glass, etc., allow pipe liner.
	Straight Pipe Section		Section Longer than 8D, where D is pipe diameter. If a pump is near, the straight pipe section following the pump should be >15D.
Cable	Shielded transducer cable. Standard length 20 (6m). Can be extended to 990 (300 m). Contact the manufacturer for longer cable requirement. Cable should not be laid in parallel with high-voltage power lines, neither should it be close to strong interference source such as power transformers.
Environment		NEMA 6
Weight	DMTFB1, transmitter 6lb(about 2.7 kg), S/M transducer 2lb(about 0.9 kg), L1 transducer 4lb DMTFB2, transmitter 14lb(about 6.3 kg), S/M transducer 2lb(about 0.9 kg)