Features

1. Advanced DSP and MULTIPULSE™ Technology.

2.40-hour battery (rechargeable), 4-line display all robust, waterproof housing integrated with backlight.

3. Providing cost-effective SD card data logger function, etc. Cost-effective and versatile, the flow rate can flow event search, the speed depends on users' choice, and the maximum can reach 8GB.

4. Works Reliable, both clean and slightly dirty liquid.

5. Lightweight and easy to carry in the box.

6. Various outputs 4-20mA (for flow rate), frequency, RS232 and Data logger, etc..

7. Optional Heat flow BTU function, a pair of temperature sensors in the inlet and outlet temperature display and heat flow rate, total heat flow display.

Serial DMTFP Portable


Serial DMTFP Portable Transit Time Ultrasonic Flow Meter is a state-of-the-art universal transit time flow meter that uses MultiPulseTM technology and low-voltage broadband pulse transmission, which features advanced non-invasive flow measurement technology providing a measurement system that is worlds unmatched in accuracy, versatility, ease of assembly and reliability. Although designed primarily for clean liquids, the flowmeter can reliably measure liquids containing reasonable amounts of suspended solids or aeration. DMTFP

It is designed for long or short term flow measurement surveys in full pipe fluid systems and is ideal for verifying any permanently mounted flow meter calibration.

Apps

* Water (hot water, water, drinking water, cooling, sea water etc.)

* Petroleum products

* Chemistry, including alcohol, acid, etc.

* HVAC, energy metering system

* beverage, food and drug processors

* Secondary sewage, waste treatment, etc

* Power plants (nuclear power plants, thermal and hydroelectric power plants), heat energy boiler feed water.

* Metallurgical and mining applications

* Pipeline leak detection, inspection, monitoring and collection

Measurement Principle

The DMTF transit time flowmeter uses two transducers that function as both ultrasonic transmitters and receivers. The transducers are compressed outside of a closed tube at a certain distance from each other. The transducers can be installed in the V-method, or W-method, in which case the ultrasound tube cannot be read four times, or in the Z-method inside case with two tubes, in this case the ultrasound tube is mounted against the transducers, and the ultrasound edges of the tube cannot be read only once. The choice of mounting method depends on the pipe and fluid properties. When the flowmeter works, two transducers transmit and receive ultrasonic signals amplified by a multi-beam (Figure 1) traveling firstly downstream and then upstream. Because ultra sound moves upstream faster than downstream, (t△) flight time will be difference. When the flow is still, the time difference (t △) is zero. Therefore, as long as we know the flight time for both up and down, we can study the time difference and then the flow rate (V) and flow volume (Q) via the following formula.

V = K * D * t △

V: Liquid velocity

K: Fixed

D: Distance between two transducers

△ t: Difference in flight time


Portable DMTFP Series

Series DMTFP Portable Transit Time Ultrasonic Flow Meter is a state-of-the-art universal transit time flowmeter, designed using advanced MultiPulseTM technology and low-voltage broadband pulse transmission, feature non-invasive flow measurement technology, providing the world's measurement system with unmatched accuracy, versatility, with ease of installation and reliability. Although primarily designed for clean liquids, the flowmeter can reliably measure liquids containing a moderate amount of suspended solids or aeration. The DMTFP is designed for short or long term flow measurement surveys in full pipe liquid systems and is ideal for verifying any permanently installed flow meter calibration.

Measurement Principle
DMTF transit time flowmeters utilize two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe at a certain distance from each other. The transducers are mounted on the transducers upside down, in this case the ultra sound is twice the pipe inside, in this case method V-, or The ultra sound can be installed four times, or in this case the W-method tube inside the Z-method tube, and the ultra sound transverses the tube only once. The choice of mounting method depends on the pipe and fluid properties. When the flowmeter works, the two transducers transmit and first move up and down (Figure 1) and then receive multi-beam amplified ultrasonic signals. Because ultrasound moves up faster and down, there will be a difference in flight time (△ t). When flowing, the time difference (△ t) is zero. Therefore, as long as we know the two flight times up and down, we can then take care of the clock difference and current velocity (V) and current volume (Q) via the following formula.

Data Recording and Software Program

Features:
1. Memory capacity can be 512MB, 1GB, 2GB, 4GB, 8GB provides data recording based on SD card data memory. Normally, 1GB can store 5 years of data with session 5 minutes apart.
2. It is very easy to read data from SD card (just Plug Out Dynameters Data Logger and browse to SD card file, run Dynameters Data logger and analyze software).
3. Data report and Data Curve functions (shown right).
4. User can edit and print Excel report and (right showed) on PC.
5. Analyze Functions Included (shown right).
6. Log Parameters: Flow Rate, Velocity, Positive total flow, Negative total flow, Net total flow, Total heat flow and heat flow rate. If the user is interested in other parameters, please consult us. Users can delete the unnecessary parameters from the Excel Table and then print the data table.
7. We have two types of data logger, dedicated (including DMTFB, DMTFC, DMTFD, DMTFF, DMHF) and Portable (DMTFP) Series, another for Handheld (DMTFH) Series.