DMTFC Advanced Insertion Transit-time Ultrasonic Flow Meter ::: Shanghai Dynameters Tech. Co., Ltd.

The DMTFC wall-mount Insertion 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 DMTFC 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 hot-tapped mounting of insertion transducers, there is no ultrasonic compound and coupling problem; Even though the transducers are inserted into pipe wall, they do not intrude into the flow, thus, do not generate disturbance or pressure drop to the flow. Comparing with clamp on flow meter, the insertion (wetted) type has the advantage of long-term stability and better accuracy.

Features:

· Cost effective and versatile.
· Spool-piece transducer for best accuracy.
(better than 1.0 % read ) and best long-term stability.
· No moving parts, no pressure drop, no maintenance.
· Easy and economical installation, Hot-tap Installation.
· Wide measure range, 0.03~40ft/s (0.01~12m/s).
· Wide pipe size range, 4~180 inches (DN100~4570mm).
· 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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No.2 DMTFC Model Selection

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Download DMTFC Catalogue (1,114KB)

Applications:

The DMTFC flow meters are ideal for process-control or flow measurement at fixed locations. 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 cooling water, hot water, chilled water, city water, sea water,
Water supply and drainage water etc.
Secondary sewage, waste treatment, etc.
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
	Display	LCD with backlight. 220 letters. Display instantaneous flow rate, total flow (positive ,negative and net flow), velocity, time, etc.
	Units	English (U.S.) or metric
	Signal Outputs	Current output:4~20mA Impedance 0~1k ohms, accuracy 0.1%
	Signal Outputs	OCT output: pulse signal for accumulated flow rate( positive, negative and net rates); frequency signal for instantaneous flow rate(0~1,000 Hz selectable)
	Repeatability	Better than 0.5% read
	Accuracy	Better than 1.0 % read for velocity above 1.0 ft/s
	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 : EEe XII (for model DMTFC2 only)
Liquids	Liquid Types	Virtually most any liquid containing less than 5% total suspended solids (TSS) or aeration.
Liquids	Liquid Temp	(Std) -40 to 180F [-40 to 82], opt -40 to 300F [-40 to 150]
Pipe	Pipe Size	(Std) 4 to 120 inches [100 to 3048 mm] pipe I.D.
	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 line, neither should it be close to strong interference source such as power transformers.
Environment	Temperature	Transmitter : -40 to 131F [-40 to 55]
	Temperature	Transducer : (Std) -40 to 180F [-40 to 82], opt -40 to 300F [-40 to 150]
	Humidity	Transmitter : 0-95% relative humidity, non-condensing
	Humidity	Transducer : 0-95% relative humidity, non-condensing
Weight	DMTFC1, transmitter 6lb(about 2.7 kg), transducer 4lb(about 1.8 kg, including ball valve) DMTFC2, transmitter 8lb(about 3.6 kg), transducer 4lb(about 1.8 kg, including ball valve)