Product Characters
* Digital temperature compensation and non-linear correction.
* High cost-effective and 1-year warranty.
* High sensitivity, high precision and high stability.
* With temperature compensation in full temperature zones, good electrical performance and long-term stability.
* Can be with customized and OEM according to users' requirements; Laser marking.
* Liquid inlet is with protecting cover and easy to clean, which can prevent and and gravel from depositing effectively.
* With many kinds of signal outputs and air permeable cable, which can solve gauge pressure's error value between the transmitter's inside and disconnected atmosphere perfectly.
* With high-performance diffusion silicon sensor cores. Adopt advanced chip for signal conditioning of highly integrated bridge type pressure transmitter.
Product Overview
VLF-928 input type level transmitter adopts diffusion silicon sensor cores from international famous company, with high-reliable amplifying circuit and precise digital temperature compensation and non-linear correction, converting the measured liquid depth into
4-20mA, 0-10VDC analog signals and TIC→RS485 standard digital signals. It is with fully sealed stainless steel 304 structure and IP68. The user can measure all kinds of liquid' depth conveniently, quickly and precisely. It is with high cost-effective and can be widely applied in petroleum, chemical, metallurgy, electricity, water supply and other fields.
Product Parameters
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Pressure range |
0-2mtr (can be customized) |
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Overload pressure |
200%FS |
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Process connection |
M20*1.5 etc, can be customized |
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Accuracy |
±0.5％, ±0.2％, ±0.1％, etc. |
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Temperature compensation range |
-10～70℃ |
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Long term stability |
±0.3%FS/year |
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Operating temperature |
-40~85℃ |
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Storage temperature |
-40~125℃ |
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Output signal |
Absolute value 0-10V |
Proportion 0-5V |
4-20mA |
IIC |
RS485 |
|
Supply power (V) |
10-36 |
3.0-5.5 |
10-36 |
3.3-5.5 |
10-36 |
|
Load (Ω) |
＞10K |
＞10K |
≤50 (U-10) |
- |
- |
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Protection |
IP68 |
Seal ring |
Nitrile rubber |
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Media suitability |
Various fluids that are non-corrosive to 304 stainless steel |
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Vibration |
10gRMS, (20~2000) Hz |
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Impact |
100g, 11ms |
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Insulation |
>100MΩ @250VDC |
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Response time |
<1ms |
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CE certification |
EMC: IEC61326-1 B type Electrostatic discharge immunity: IEC61000-4-2 Electromagnetic field immunity: IEC61000-4-3 EFT immunity: IEC61000-4-4 Surge immunity: IEC61000-4-5 |
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Dimensions (thread can be customized)
Electrical Connection
|
|
4～20mA |
Vout |
IIC |
RS485 |
|
1 |
Vin (red) |
Vin (red) |
Vin (red) |
Vin (red) |
|
2 |
GND (black) |
GND (black) |
SCL (white) |
A (yellow) |
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3 |
|
Vout (white) |
SDA (yellow) |
B (white) |
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4 |
|
|
GND (black) |
GND (black) |
Tips for Selection
1. Please note that the measured medium is compatible with the part of the product in contact with the medium, and the specific gravity of the measured medium should be indicated (the default is water 1g/cm³, T=4℃).
2. Voltage type input and output have a variety of ranges, need to be indicated in the order.
3. The IIC output type has no polarity protection, the installation and use process must be confirmed before the power on, the wire length is less than 3 meters.
4. The cable shall not be vertically bent during installation, and arc bending is required to avoid blocking the air vent and affecting the accuracy.
5. When measuring the flow of liquid can be inserted in the liquid φ50 or so hard pipe, in the pipe water flow in the opposite direction of different heights to open a number of holes, to avoid the influence of liquid flow on pressure.
6. When the product is installed in a thunderstorm area, it is recommended that users install lightning protection devices.
7. If you have any special requirements, please contact us and indicate them in your order.
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