MC 4-20mA abs measure 5-60m ultrasonic level antiseptic explosion
proof liquid level sensor gauge DKDP-200
Ultrasonic level gauge
The ultrasonic level gauge is a digital level gauge controlled by a
microprocessor. In the measurement, the ultrasonic pulse is emitted
by the sensor (transducer). The sound wave is reflected by the
liquid surface and then received by the same sensor. It is
converted into an electrical signal by a piezoelectric crystal. The
time between the transmission and reception of the sound wave is
used to calculate the sensor to the Measure the distance to the
surface of the liquid. Due to the non-contact measurement, the
measured medium is almost unlimited, and it can be widely used for
height measurement of various liquid and solid materials.
Product Introduction
Ultrasonic level gauge is a monitoring instrument for measuring
liquid height, tank height, and material location. The instrument
itself can adopt two-wire, three-wire or four-wire technology. The
two-wire system is: power supply and signal output are shared; the
three-wire system is: power supply circuit and signal output
circuit are independent. When DC 24v power supply is used, a 3-core
can be used Cable, the power supply negative terminal and the
signal output negative terminal share a core wire; the four-wire
system is: when AC 220v power supply is used, or when DC 24v power
supply is used, and the power supply circuit and the signal output
circuit are required to be completely isolated, one core should be
used. A 4-core cable. DC or AC power supply, with 4~20mADC, high
and low switch output.
Anticorrosive ultrasonic level gauge
Anticorrosive ultrasonic level gauge
Range: 0-60 meters, various forms are available, suitable for
various corrosive and chemical occasions, high precision, remote
signal output, PLC system monitoring.
The ultrasonic level gauge is composed of three parts: ultrasonic
transducer (probe), drive circuit (module), and electronic liquid
crystal display module.
Intelligent acoustic echo is analyzed
Intelligent acoustic technology can be used to analyze the
intelligent echo, without any debugging and other special steps,
this technology has the function of dynamic thinking, dynamic
analysis. Make the precision of the instrument, greatly improve the
level precision reached 0.5%, can be all kinds of interference
wave.
Details
High quality of transparent protective shell
Clear, intuitive observation data, waterproof and dustproof design,
effectively protect the internal wiring
Protective electrical interface.
Use ABS engineering plastic material, impact resistant, aging
resistant, high temperature and low temperature resistance, long
service life.
High quality sealing ring
Installed inside have coil shock protection, stability overall
sealing capability
High quality probe design
Using closed probe, physical sealing good, protect the internal
circuit
Product size
Specification
Model Number: | DKDP-200 |
Working temperature: | -20-60 |
| Warranty | 1 year |
| Output | 4-20mA |
Accuracy: | 0.5-1 |
Measuring Range: | 5-60m |
Material: | Plastic |
level of protection: | IP65 |
Medium: | water |
Power supply: | 24VDC
|
Working principle
The working principle of the ultrasonic level gauge is that the
ultrasonic transducer (probe) sends out a high-frequency pulse
sound wave when it encounters the surface of the measured level
(material) and is reflected and folded back. The reflected echo is
received by the transducer and converted into an electrical signal.
The propagation time of the sound wave. It is proportional to the
distance from the sound wave to the surface of the object. The
relationship between the sound wave transmission distance S and the
sound speed C and the sound transmission time T can be expressed by
the formula: S=C×T/2.
Because the transmitted ultrasonic pulse has a certain width, the
reflected wave and the transmitted wave in a small area close to
the transducer overlap, which cannot be identified and the distance
value cannot be measured. This area is called the measurement dead
zone. The size of the blind zone is related to the model of the
ultrasonic level meter.
The probe part emits ultrasonic waves. When the ultrasonic waves
encounter a medium with a large difference in density from the air,
they will reflect, and the reflected waves will be received by the
probe part. The distance from the probe to the liquid (object)
surface is proportional to the time the ultrasonic waves pass:
Distance [m] = time × speed of sound/2 [m]
The temperature compensation formula of the speed of sound: ambient
sound speed = 331.5 + 0.6 × temperature
Site conditions
In any of the following situations, pay attention:
Liquid/solid with foam
There are strong voltage, strong current, strong electromagnetic
interference around, try to avoid high voltage, high current and
strong electromagnetic interference
Strong wind and direct sun
Strong vibration
Sites with highly volatile liquids and large amounts of water vapor
Easily crystallized liquid
When encountering the above-mentioned field environment, you must
choose to use it carefully, the accuracy of the measured value will
be reduced, and the data may be unstable. Generally, it is not
recommended to use an ultrasonic level gauge to measure.
Application area
Water and sewage treatment: pump room, collection well, biochemical
reaction tank, sedimentation tank, etc.
Electric power, mines: mortar pool, coal slurry pool, water
treatment, etc.
