Ultrasonic Level Transmitter For Reservior Intake Wet Well Applications
1. Working Principle
Ultrasonic principle:
Ultrasonic sensors emit short, high-frequency sound pulses at regular intervals. These propagate in the air at the velocity of sound. If they strike an object, then they are reflected back as echo signals to the sensor, which itself computes the distance to the target based on the time-span between emitting the signal and receiving the echo.
2. Technical data:
Basic data
| Type | MLT |
| Power supply | DC24V (±10%) 60mA |
| Display | 4 digit LCD |
| Accuracy | 0.2% of full span (in air) |
| Output current | 4-20mA |
| Output load | 0-500Ω |
| Temperature range | -40℃~80℃ |
| Pressure range | ±0.1MP (press definitely) |
| Measure cycle | 1 second (changeable ) |
| Beam angle | 8º(3db) for range :4m 6m 8m 5º(3db) for range :12m 15m 20m 30m |
| Parameter set up | 3 induction buttons |
| Cable connection | PG13.5 |
| Material | The electronic unit : metal The sensor: ABS |
| Protect grade | IP67 |
| Fix | Screw or Flange |
The measuring range:
| MODEL | MLT4 | MLT6 | MLT8 | MLT12 | MLT15 | MLT20 | MLT30 |
| LIQUID | 4.00m | 6.00m | 8.00m | 12.00m | 15.00m | 20.00m | 30.00m |
| SOLID | | | 3.00m | 5.00m | 7.00m | 10.00m | 15.00 |
Note: When using to measuring solid level, the most energy of ultrasonic is absorbed or scattered by solid level, so the back wave is very little, the valid measuring range of solid level is about 50% of liquid level. And the valid measuring range of solid level is determined by the installing location and rang.
The blacking distance:
| MODEL | MLT4 | MLT6 | MLT8 | MLT12 | MLT15 | MLT20 | MLT30 |
| Blacking distance | 0.20m | 0.25m | 0.30m | 0.45m | 0.60m | 0.80m | 1.20m |
3. Mounting Tips
Proper mounting is critical for the successful operation of an ultrasonic sensor. Mounting mistakes are one of the most common installation pitfalls with ultrasonics. However, it doesn’t have to be difficult.
Here are a few practical guidelines that can help ensure trouble free installation for your ultrasonic level sensors.
- Make sure the face of the sensor is perpendicular to the target surface. If the sensor is a few degrees off perpendicular the target may not be detected.
- Mount the sensor in a location that provides an unobstructed column of air from the sensor to the target. Generally speaking you need a 3-4 foot diameter unobstructed column even at longer ranges. Stilling wells provide a good solution for liquid level applications where an unobstructed path to the target is difficult.
- Always mount the sensor above the highest anticipated target level by at least the minimum blanking distance. The blanking distance is usually between 4 – 12 inches depending on the model sensor you are using.
- Mount the sensor away from any fill spouts. Mounting too close to the spout could result in false readings. White noise can also be a problem, as it can interrupt the sound wave.
- Avoid mounting the sensor in the direct center of a tank if there is a domed top. The shape of the top could amplify small undesired signals inside the tank.
- Mount the sensor away for tank walls especially if the walls are corrugated or if there will be product buildup on tank walls.
- If the sensor will be mounted outdoors try to shade the sensor from direct sunlight. This can harm the sensor housing and cause overcompensation for temperature as the sensor heats up.
4. Company Profile
Melan Measurement & Control Instruments is located in Shanghai City. It is a high-tech manufacturer specialized in the design, development, manufacturing and sale of measurement and control instruments.
Our products are widely used in various fields, including electricity, chemical industry, metallurgy, brewing, oil and gas, textile, water conservancy, environmential protection, etc.
We own independent-courtyard modemized manufacturing workshops and an open office building. Melan has accumlated production and management experience in instruments from European and American and domestic famous companies.
We own first-class talent team, and all the products have reached advanced level at home and abroad. We provide our customers with complete and professional test control solutions and high-tech and high-quality products.
Melan is your reliable friend and partner. We are willing to try our best as dedication and perfection as motivation.
5. FAQ
Q: How long will you give me the reply?
A: We will contact you in 5 hours as soon as we can.
Q: What is the warranty of your prducts?
A: Our warranty is 12 months after the shipping date.
Q: What is the lead time of your products?
A: Normally our factory lead time is 10-12 working days.
Q: Can I OEM your products?
A: OEM and ODM customization are welcomed.
Q: What is your MOQ?
A: We have no MOQ limit, small quantity order is acceptable.
Q:What is the transport?
A: Express such as DHL, FedEx, UPS for freight prepaid, and we can also use your own courier account to do the freight collect. For more goods we can arrange by air or by sea.
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