Capacitance level gauge

Capacitive liquid level meter is suitable for continuous detection of various liquids under harsh conditions such as high temperature and high pressure, strong corrosion, easy crystallization, easy blockage, etc. The capacitive level meter is suitable for measuring the water level of sewage, acid-base solution and boiler. The whole machine has no movable or elastic parts. It is shock resistant, easy to install, high reliability and high precision. It can replace the traditional floating ball type, input type, differential pressure type liquid level transmitter in various applications.

The core component of capacitive liquid level meter adopts RF capacitance detection circuit, which is transformed into standard electrical signal (4 ~ 20 mA in general) through accurate temperature compensation and linear correction by 16 bit MCU. Hart, CANbus and 485 communication protocols can be selected for system configuration. All series of capacitive liquid level meters have self calibration function. The user can automatically calibrate "zero point" and "range" through two buttons to meet the different requirements of various complex places.

Features of capacitive liquid level meter:

1. The structure is simple, without any movable or elastic components, so the reliability is very high and the maintenance is very little. In general, it is not necessary to carry out routine large, medium and small maintenance.

2. Multiple signal output, convenient for different system configuration.

3. It is suitable for the liquid level measurement of high temperature and high pressure vessel, and the measured value is not affected by the temperature and specific gravity of the measured liquid, the shape and pressure of the vessel.

4. It is especially suitable for the measurement of acid, alkali and other strong corrosive liquids.

5. Perfect over-current, over-voltage, power polarity protection.

Performance of capacitive liquid level meter:

1. Detection range: 0.01 ~ 2000m

2. Pressure range: - 0.1MPa ~ 32Mpa

3. Extreme temperature resistance: - 50 ~ 250 ℃

4. Ambient temperature: - 20 ~ 60 ℃

5. Storage temperature: - 55 ℃ ~ + 125 ℃

6. Output signal: 4 ~ 20mA, 4 ~ 20mA superposition HART communication, 485 communication, can bus communication

7. Power supply voltage: 12 ~ 28vdc (power supply through safety barrier)

8. Fixing method: thread mounting M20 × 1.5、M27 × 2，

Flange installation DN25, Dn40, DN50. Special specifications can be customized

9. Wet material: 316 stainless steel, 1gr18ni19ti or polytetrafluoroethylene

10. Long term stability: ≤ 0.2% FS / year,

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12. Explosion proof grade: intrinsically safe Exia Ⅱ C T6 flameproof Exd Ⅱ C T5

13. Protection grade: IP67

14. Intrinsic safety parameters: UI: 28vdc, II: 93ma, PI: 0.65w, CI: 0.042uf, Li: 0mh

Wiring of capacitive liquid level meter:

The capacitive liquid level meter is a standard two-wire or three wire instrument. The power (signal) terminal is located in the wiring side of the instrument shell. The signal line should use shielded wire or twisted pair with two buttons together. Try not to pass through the conduit or open trunking together with other power lines, nor near the high-power equipment.