145Khz Gas flow transducer for mine air flow meter
Application:
The transducer is used for ultrasonic mine airflow meter; use to measure all kinds of mine tunnel airflow
– What is Gas Flow Meter?
A gas meter is a specialized flow meter, used to measure the volume of fuel gases such as natural gas and liquefied petroleum gas. Gas meters are used at residential, commercial, and industrial buildings that consume fuel gas supplied by a gas utility. Gases are more difficult to measure than liquids, because measured volumes are highly affected by temperature and pressure. Gas meters measure a defined volume, regardless of the pressurized quantity or quality of the gas flowing through the meter. Temperature, pressure, and heating value compensation must be made to measure actual amount and value of gas moving through a meter.
Several different designs of gas meters are in common use, depending on the volumetric flow rate of gas to be measured, the range of flows anticipated, the type of gas being measured, and other factors.
Ultrasonic Gas Flow Sensor TG0145KC Used inside Ultrasonic flow meters are more complex than meters that are purely mechanical, as they require significant signal processing and computation capabilities. Ultrasonic meters measure the speed of gas movement by measuring the speed at which sound travels in the gaseous medium within the pipe. calculation which predicts the speed of sound in a gas with a known pressure, temperature, and composition.
Ultrasonic Gas Flow Sensor TG0145KC Technical parameters:
| Model | TG0145KC |
|---|---|
| Center resonant frequency(kHz) | 145KHZ ± 4% |
| Bandwidth | 12kHz |
| Launched wave beam angle (-3dB full opening angle) | 14 ± 2° |
| Sensitive (0 dB=5 Vp-p;CW; distance: 5cm) | -34dB min |
| Electrostatic capacity | 650PF ± 20% |
| Minimal parallel impedance | 700Ω ± 30% |
| Maximum operating voltage (Pulse Duty cycle ratio 2%) | 500Vp-p |
| Operating temperature | -20～70℃ |
| Storage temperature | -40～85℃ |
| Protection class | IP65 |
| Case Material | ABS |
The tests were conducted in 25 ° environment.
Frequency-resistance
Frequency-phase angle
Sensitivity test:
voltage:5Vp-p; Continuous Wave;distance:5cm
Pointing Angle curve