A change of the medium level will induce a change in the current of the applied sine wave.
From Z=1/2pfc, when the capacitance in the vessel increase, impedance will decrease and current will increase. Vice-versa, when the capacitance in the vessel is small, the impedance will increase and current will decrease accordingly.
- Suitable for high temperature, high pressure and corrosive environment.
- Not affected by noisy, dusty, misty and changes in the temperature.
- No blind distance, ideal for different tanks.
- Economic for large tanks
- 4~20mA output compatible for most control systems11.Magnetic Float Level Transmitter-FG Series
The "Magnet Float Level Indicator" is composed of the float and sensing rod (shown as below). As the float raised or lowered by liquid level, the sensing rod will have a resistance output, which is directly proportional to the liquid level. Also, the float level indicator can be equipped with the TAB-1531 (please see page 3) to produce a 0/4~20mA signal. In addition, we can use with PB series bargraphic display scaling panel meter for level control and display. Anyway, "Magnet Float Level Indicator" is a great benefit to all kinds of industries with its easy working principle and reliability.
- Every sensing element is protected by a plastic package, safety in use and transport.
- High performance and reliability of electric circuit modular designed.
- Lower installation costs, less maintenance, reduced personnel training, and decreased plant shock down time.12. By-Pass Level Transmitter-EF Series
PrincipleBy by-passing a liquid to the outside chamber, taking advantage of a float inside the chamber with a magnet inserted as well as in the color flags, one can reveal the level of the liquid in a tank as the flags turn and change color by magnetic attraction to the float.
- Applicable in environments with high temp., high pressure, strong acid, strong alkali and hazardous locations.
- The structure is simple but durable and reliable. It is also with various optional devices for upgrade in use.
- A Level Transducer or Magnetic Switches can be installed and adjusted with no need to stop any process.
- It is not operated by electricity and with not be affected by power failure.
- The flag display is scaled by a piece of color, division every 10cm, one can easily read the levels height.
- Multiple applications for textile dyeing, sewage water processing, power generating, hot coal oil boiler and petrochemical industrie12. Mini By-Pass Level Transmitter-MEF Series
By by-passing a liquid to the outside chamber, taking advantage of a float inside the chamber with a magnet inserted as well as in the color flags, one can reveal the level of the liquid in a tank as the flags turn and change color by magnetic attraction to the float.
- It is not operated by electricity and with not be affected by power failure.
- Multiple applications for textile dyeing, sewage water processing, power generating, hot coal oil boiler and petrochemical industries.13. Ultrasonic Level Transmitter-EA Series
The ultrasonic level Indicator is a low-cost, noncontact and easy-to-install measurement device. It is able to meet the every-day needs of commercial production, as well serving a more specialized role in the technologically-advanced aero-space industry, thus placing it firmly in the category of high-level measurement technology. Unlike other level indicators with limited uses, the easy-to-install ultrasonic level indicator is a highly-accurate device with enough specialized uses to ensure that the needs of the customer are met.
- Measuring range is available with 2M, 5M, 7.5M, 10M,15M, 20M, 50M
- Measuring accuracy +/-0.25% in liquid resolution is 2 mm.
- Output : 2-wire, 3-wire and indicator (transducer and controller are separated).
- Beam small angle, short blanking distance, is suitable for small tank.
- Analog output : 4 ~20mA or 20 ~4mA.
- Supply voltage: 110 / 220VAC or DC24V.
- Suitable for powder and liquid application.
- Fail-safe function, can accommodates the possibility of transducer or power failure.
- Operating temperature: -20°C ~ 60°C. Enclosure rating: IP-65.
- Communication port : RS232, RS485. Relay output : 1~5 x SPDT.14. FMCW Radar Level Transmitter-JFR Series
FMCW radar adopts a high frequency signal, which is emitted via an antenna and swipe frequency increment by 0.5GHz during the measurement, reflected by the target surface and received at a time delay. The frequency difference, which is calculated from the transmitting frequency and the received frequency, which is directly proportional to the measured distance (or material surface).
The frequency difference then is processed by Fast Fourier Transformation (FFT) to identify the signal in Intermedium Frequency (IF). This FMCW radar is innate with signal / noise enhancement and filtering of echo-back via Phase-Lock Loop (PLL) circuit that is the best solution for complex environment and high accuracy measurement.
- Corrosive and toxic liquid, hydrocarbons, slurries
- Not affected by specific gravity, pressure, temperature, viscosity, foam, and dust
- 5 digits LCM display
- Indicate signal wave inside the silo.
- Selection of Different Measurement unit(m, cm, mm, inch, ft, %, mA)
- Measuring distance and actual level.
- Language selection of traditional Chinese, simplified Chinese, English.
- 4-20mA/ 4 lead wires
- Modbus RS-485 to enhance isolation and easy for remote control.
- CE standards for isolation(EFT 2000V, B class or better)
- Suitable for mid-range signal
- 4-20mA output
- Set functions to the continuous measuring device via FAS software.
- Isolated circuit design.
15. Rotary Paddle Level Switch-SE Series
PrincipleThe SE series operating principle is simple. A unit is usually located through a bin wall at the top, middle or low level of a bin. During normal operation (no material present) a synchronous motor rotates the paddle at 1 RPM. When this paddle rotation is impeded by material,
surrounding the paddle, motor will stall and cause the Micro-switch to change state. (indicating an alarm or control)Features
- Unique sealing ring design, it can perform good dust protection to avoid the dust permeate into housing body along with the shaft.
- The torque force is adjustable.
- The performance of torsion is stable and reliable.
- If the rotary paddle bears an extra overload, the motor will be appeared slide to prevent the inside mechanism damaged.
- It is rationally designed, the inside mechanisms are easily tore down for checking, maintenance and replacement. It doesn"t necessary to remove the complete set from the tank.
- Very suitable for small tank and material of low density16. Capacitance Level Switch-SA Series
PrincipleThe capacitance level sensor measuring principle is base on the " capacitance effects " , when this level sensor is set on a silo, it will be formed a condenser between the detector electrode and the silo wall. The capacitance of this condenser varies proportional to the change of material specific inductivity ( DK value) of the material stored in the silo , when the more material substances increased in the silo, the more capacitance value added simultaneously, then it will let his interior circuit "s resonant signal to create a bigger amplitude ,and such a signal amplitude become more or less than factory default threshold value, the relay device will be energized.
- No moving parts inside the device, it will be not affected by friction, which are suitable for powder or liquid application.
- Various models are suitable for different application.
- The sensitivity, which includes 10pf, 20pf and 40pf, is adjustable.
- With timing delay design, timing adjustable range 0 ~ 6 seconds.
- Voltage: 110V/220VacC or 24Vdc
- Output: NPN transistor, 5A/250Vac and 5A/240Vac SPDT contact.
- Standard connecting screw 1" NPT, special specification are acceptable.
- Enclosure protection IP65 or explosion-proof.
- SA-75U Zener barriers inside provide intrinsic safety (Ex ia IIC) to SA17( )D type level switch.
17.Vibrating Probe Level Switch-SC Series
PrincipleThe vibrating probe of level switch operated by using two piezoelectric elements built-in on vibration tube. The first piezoelectric element triggered by pulse signal that created from circuit to transport vibration energy out, and the other piezoelectric element receives the vibration and transmits it to output electric signal. While the probe contacts material, the detection signal will be decayed and the vibration will hold and send out the relay on.
Vibrating probe of level switch provides reliable & maintenance-free for bulk solids. Just a simple mounting and calibration procedure that keep your facility in save and monitoring. This device can withstand fiercely lateral loads and static electricity.
For friendly use, Fail-safe is equipped as standard to prevent malfunction caused by power shortage.
- Sturdy and durable design. No calibration needed.
- Special design to avoid the accumulation of material on probe.
- High / Low fail safe modes
- Field-operatable in sensitivity adjustment to fit versatile density of material.