Understanding the Functionality and Applications of Ultrasonic Type Flow Transmitters
Ultrasonic type flow transmitters are a crucial component in various industries, playing a pivotal role in the measurement and control of fluid flow. These devices use ultrasonic technology to accurately measure the velocity of a fluid flowing in a pipe or conduit, providing valuable data for process control, monitoring, and automation. Understanding the functionality and applications of these transmitters can provide a deeper insight into their importance in various industrial settings.
Ultrasonic type flow transmitters operate based on the principle of ultrasonic wave propagation. They consist of a pair of ultrasonic transducers, which are strategically placed on the exterior of the pipe. One transducer acts as a transmitter, emitting ultrasonic waves into the fluid. The other transducer acts as a receiver, capturing the waves after they have traveled through the fluid. The time it takes for the ultrasonic waves to travel from the transmitter to the receiver is directly proportional to the velocity of the fluid flow. By measuring this transit time, the flow transmitter can accurately calculate the flow rate of the fluid.
There are two types of ultrasonic flow transmitters: Doppler and transit-time. Doppler flow transmitters are used when the fluid contains particles or bubbles, as they measure the frequency shift of the ultrasonic wave reflected off these particles. On the other hand, transit-time flow transmitters are used for clean fluids, as they measure the time difference between the upstream and downstream ultrasonic waves.
One of the key advantages of ultrasonic type flow transmitters is their non-invasive nature. Since the transducers are mounted on the outside of the pipe, there is no need to interrupt the flow or compromise the integrity of the pipe for installation or maintenance. This feature makes them ideal for applications where the fluid is corrosive, abrasive, or at high temperature.
| Measuring Method | N,N-Diethyl-1,4-phenylenediamine (DPD) spectrophotometry | |||
| Model | CLA-7122 | CLA-7222 | CLA-7123 | CLA-7223 |
| Inlet water channel | Single channel | Dual channel | Single channel | Dual channel |
| Measurement range | Total Chlorine : (0.0 ～ 2.0)mg/L ,calculated as Cl2 ; | Total Chlorine : (0.5 ～10.0)mg/L ,calculated as Cl2 ; | ||
| pH：（0-14）；temperature：（0-100）℃ | ||||
| Accuracy | Free chlorine: ±10% or 0.05mg/L (whichever is greater), calculated as Cl2; Total chlorine: ±10% or 0.05mg/L (whichever is greater), calculated as Cl2 | Free chlorine: ±10% or 0.25mg/L (whichever is greater), calculated as Cl2; Total chlorine: ±10% or 0.25mg/L (whichever is greater), calculated as Cl2 | ||
| pH:±0.1pH；Temp.:±0.5℃ | ||||
| Measurement cycle | Free Chlorine≤2.5min | |||
| Sampling interval | The interval (1～999) min can be set to any value | |||
| Maintenance cycle | Recommended once a month (see maintenance chapter) | |||
| Environmental | Ventilated and dry room without strong vibration; Suggested room temperature: (15 ～ 28)℃; relative humidity: ≤85% (no condensation). | |||
| requirements | ||||
| Sample water flow | （200-400） mL/min | |||
| inlet water pressure | （0.1-0.3） bar | |||
| Inlet water temperature range | （0-40）℃ | |||
| Power supply | AC (100-240)V； 50/60Hz | |||
| Consumption | 120W | |||
| Power connection | 3-core power cord with plug is connected to the mains socket with ground wire | |||
| Data output | RS232/RS485/（4～20）mA | |||
| Dimension size | H*W*D:（800*400*200）mm | |||
Moreover, ultrasonic type flow transmitters are highly accurate and reliable. They can measure a wide range of flow rates, from very low to very high, with minimal error. They are also unaffected by changes in fluid properties such as temperature, pressure, and viscosity, ensuring consistent and accurate measurements under varying conditions.
Ultrasonic type flow transmitters find applications in a wide array of industries. In the water and wastewater industry, they are used for leak detection, flow monitoring, and pump control. In the oil and gas industry, they are used for custody transfer, leak detection, and process control. In the chemical and pharmaceutical industries, they are used for batch control, blending, and filling operations. They are also used in the food and beverage industry for clean-in-place (CIP) systems, product loss prevention, and quality control.
| ROC-2315 ro controller instruction (220V) | |||
| Model | ROC-2315 | ||
| Single detection | Dry Contact input | Raw water no water protection | |
| (six channels) | Low-pressure protection | ||
| High-pressure protection | |||
| Pure water tank high level | |||
| External control mode signal | |||
| Running reset | |||
| Control port | Dry Contact output | Raw water pump | SPST-NO low capacity : AC220V/3A Max ;AC110V/5A Max |
| (five channels) | Inlet valve | ||
| High pressure pump | |||
| Flush valve | |||
| Conductivity over-limit drainge valve | |||
| Measurement detection point | Product water conductivity and with Automatic Temperature compensation (0～50）℃ | ||
| Measurement range | Conductivity : 0.1~200μS/cm/1~2000μS/cm/10~999μS/cm (with different conductivity sensor ) | ||
| Product water temp. : 0~50℃ | |||
| Accuracy | 1.5 level | ||
| Power supply | AC220V (±10%) , 50/60Hz | ||
| Working environment | Temperature:（0～50）℃ ; | ||
| Relative Humidity :≤85%RH (no condensation ) | |||
| Dimension | 96×96×130mm( height ×width×depth) | ||
| Hole size | 91×91mm（height ×width） | ||
| Installation | Panel mounted ,fast installtion | ||
| Certification | CE | ||
In conclusion, ultrasonic type flow transmitters are an indispensable tool in modern industry. Their ability to accurately measure fluid flow without contact with the fluid makes them a preferred choice for many applications. By understanding their functionality and applications, one can appreciate their contribution to process control and automation, leading to increased efficiency and productivity in various industrial settings.
