EC-70
Capacitive object position meter
Adaptive, accurately measured, and unaffected by medium changes
- application
- Suitable for liquid solid slurry sticky shape
- (Conductive or non-conductive) materials and bad working conditions containing steam dust
- Applied to the following various technological processes
- Such as: food beverage medicine
- detergent
- feed and so on
- Prevent dry rotation or pump protection
- Real-time monitoring of the material height
- It can also be used as overflow protection
- high and low liquid level alarm
- Pump control or limit testing
- Functional characteristics
- Functional characteristics
- Suitable for liquidsolid slurry sticky shape
- (Conductive or non-conductive) materials and bad working conditions containing steam dust
- Applied to the following various technological processes
- Such as: food beverage medicine detergent feed and so on
- Prevent dry rotation or pump protection
- Real-time monitoring of the material height
- It can also be used as overflow protection
- high and low liquid level alarm
- Pump control or limit testing
- Functional characteristics
- Zero point and the program parameters can be adjusted separately for easy correction
- The zero point and the range parameters after calibration make the measurement more accurate
- The maximum rod-type extension length is up to 5m
- The maximum extension length of the cable type is 25m
- Direct measurement of the sensor effective five-bit capacitor value
- can be factory preset parameters to achieve insertion.
- No measuring blind distance is a variety of barrels are suitable for the liquid level conveyor Two lines (4-20 mA) circuit current power supply
- low power consumption (20mA max.)
- Digital filtering program
- the damping time can be adjusted and the measurement is smooth and stable
- Corrosion resistant structure the liquid part of PFA PTFE stainless steel 316L material
describe
The sensor probe of the capacitive bit meter and the measured medium capacitor form the capacitive sensor, as shown in Figure 1. The inner electrode 1 and the metal container 3 form a coaxial capacitor Cx. The equivalent circuit principle is shown in Figure 2. The cx=k1h1 + k2-h2 h = h1 + h2 cx=k · h + k · (H-hk · H + k (k-k) h1 112 1) =2 2 2... k1 / k2 is the constant of dielectric constant e liquid and ε gas; k1-h1 is the coaxial capacitor formed by liquid part; k2-h2 is the coaxial capacitor formed by gas part; where h 1 is the liquid level height and h 2 is the gas phase height; the actual capacitor sensor always has a small load, and the sensor equivalent circuit is shown in Figure 2. The capacitance Cg and the resistance Rg silkworm produced by the hanging material are added to the total sensor output Zx to produce the false liquid level of the measurement. The liquid level meter signal processor uses the RF guide technology to improve the influence of the charge on the liquid level measurement, and the measurement accuracy is basically not affected in the slight charge. It can be seen that the coaxial capacitor Cx formed between the electrode 1 and the container 3 is proportional to the liquid level h1 (because k1> k2), by measuring the change of the probe capacitor Cx.
