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DC series RF capacitive liquid level transmitter
Product Overview: The liquid level measurement principle of RF capacitive level transmitter is that the probe and conductive liquid form a capacitor,
Product details
product overview
RF capacitive liquid level transmitterThe principle of liquid level measurement is that the probe and conductive liquid form a capacitor, where the metal core of the probe line is one pole of the capacitor, the conductive liquid is the other pole of the capacitor, and the middle is a highly stable polytetrafluoroethylene, that is, the insulating outer layer of the probe line serves as the medium between the two poles. As the liquid level changes, the area of the liquid surrounding the probe line changes, causing the relative area of the two poles that make up the capacitor to change, resulting in the generation of the output model of the sensor.
The DC series RF capacitive liquid level transmitter produced by our company is a new type of liquid price measuring instrument developed by absorbing the essence of similar products at home and abroad. It can convert changes in various level and liquid medium parameters into standard current signals, which can be remotely transmitted to the operation control room for centralized display, alarm or automatic control of secondary instruments or computer devices. Its excellent structure and installation method are suitable for continuous measurement of liquid level, material level, and material level under special conditions such as high temperature, high pressure, strong corrosion, easy crystallization, anti blockage, anti cold formation, and solid powder and granular materials. It is widely used in industries such as power, metallurgy, chemical, food, and pharmaceuticals, as well as in places such as sewage treatment, boiler steam drums, and coal powder bags for liquid level, material level, and material level measurement.
Product Features
- Compact structure, small size, easy installation and maintenance, unified external dimensions;
- Multiple signal outputs, convenient for different system configurations;
- Polytetrafluoroethylene probe, resistant to strong corrosive liquids such as acid and alkali, and high temperatures;
- The measuring part immersed in liquid only has one sensor called fluorine soft wire or concave fluorine rod probe, which has high reliability;
- Fully sealed aluminum alloy shell and stainless steel connectors;
- Measuring high-temperature pressure vessels is as simple as measuring normal temperature and pressure, and the measured values are not affected by the temperature, specific gravity, container shape, or pressure of the measured liquid.
- There are multiple circuit structure modes for measuring and outputting both ends and measuring, outputting, and power supply three end isolators, with built-in isolators to adapt to different signal grounding methods.
- Complete overcurrent, overvoltage, and power polarity protection.
Technical Parameter
- Effective detection range: 0-0.2-20m
- Accuracy: Level 0.5, Level 1, Level 1.5
- Pressure bearing range: negative pressure, normal pressure, high pressure (below 32MPa)
- Working temperature: -50~240 ℃
- Environmental temperature: -20~75 ℃
- Applicable medium: acid, alkali, salt or any medium that is non corrosive to polytetrafluoroethylene
- Output signal: 4-20mA, two-wire system
- Power supply: Load resistance 0-750 Ω DC24V
- Fixed method: thread installation M20 × 1.5, M27 × 2 flange installation DN15 DN25、DN50、DN80。
- On site display: analog display 0-100%, digital display, on-site depth
Selection instructions
| Minimum range m | Maximum range (m) | describe | ||
| A | 0-0.2 | 0-20 | Used for metal containers | |
| B | 0-1 | 0-20 | Insulated material containers, underground water tanks, etc | |
| Circuit characteristics | ||||
| 1 | Non isolated two-wire system | |||
| 2 | Non isolated three wire system | |||
| 3 |
Three wire system with isolated input and output ends |
|||
| 4 | Three wire isolation four wire system | |||
| structural style | ||||
| F | split type | When the temperature at the source of the probe is greater than 65 ℃, it should be selected | ||
| L | integrated type | Select when the temperature at the source of the exploration level is less than 65 ℃ | ||
| Exploration level form | ||||
| R | Soft wire probing | |||
| B | Rod type probing | Maximum length 2 meters | ||
| Process Connection | ||||
| 1 | M20 × 1.5 threaded connection (stainless steel) | flexible cord | ||
| 2 | M27 × 2 threaded connection (stainless steel) | Stick | ||
| 3 | Flange connection | Soft wire, rod type | ||
| 4 | Pressure measuring cylinder | Soft wire, rod type |
Installation precautions
- The transmitter uses capacitance to measure raw materials. The outer insulation layer of the probe wire is made of polytetrafluoroethylene material that is resistant to high temperature, corrosion, aging and has high chemical stability. It is insulated from the measured liquid during normal operation. Be sure to protect the outer insulation layer of the probe wire during installation. Once damaged, it will shorten the service life or cause installation failure;
- After the installation of the probe wire is completed, when it is fully immersed in the liquid, the insulation resistance between the probe wire and the liquid (or the outer wall of the metal container) should be greater than 20M Ω (measured with a digital multimeter in the 20M Ω range). When measuring the insulation resistance, the connection between the probe wire and the transmitter should be temporarily disconnected;
- When installing the transmitter outdoors, the probe wire should not be exposed outside the container to avoid damage.
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