Flat membrane pressure transmitter

Transmitter Series>>ZW1088Flat membrane pressure transmitter：

1、 Instrument Overview:
Flat membrane pressure transmitterMeet the requirements of Good Manufacturing Practice (GMP) for drug production quality standards, suitable for sanitary grade systems, where the medium must not come into contact with the instrument measurement system. Diaphragm sealing does not create blind spots or areas that cannot be emptied. This type of instrument has the advantages of quick and easy disassembly, low pollution, easy cleaning, beautiful appearance, and safe and reliable technical performance. It can be widely used in industries such as pharmaceuticals, food, beverages, dairy production, water treatment, etc. In addition to indicating the pressure value locally, the instrument can also continuously output a 4-20mA DC signal that is linear with the pressure value. It can be used in conjunction with XM series digital control instruments to form a display.

2、 Measurement principle:
Flat membrane pressure transmitterResistors are formed using diffusion or ion implantation processes and connected to form a Wheatstone bridge. Pressure sensitive membranes are formed under the bridge using micro machining techniques. When pressure is applied to the diaphragm, the resistance value changes and a linearized output signal proportional to the applied pressure is generated. We add a DC power supply to the Wheatstone bridge, which produces an output of a DC voltage signal. After a secondary conversion circuit, achieve a two-wire system with 4-20mA output.

3、 Applicable occasions:
The pressure transmitter is an integrated stainless steel plane membrane structure, specially designed for food, medical, pharmaceutical and other health industries. The sensor plane membrane structure prevents scaling, unsanitary and viscous liquid blockage. Widely used in process control fields such as food, pharmaceuticals, and brewing. Its industry applications include the following:
1. Food hygiene industry;
2. Paper industry;
3. Wastewater level measurement;
4. Measurement of liquid level in beverage cans;
5. Pipeline liquid level measurement;
6. Processing of pharmaceuticals and biological products.
4、 Performance characteristics:
1. Quick installation chuck type: This type of product adopts the commonly used "quick card" connection form in industries such as medicine and food, with good universality and strong interchangeability.
2. Beer type: Designed for the beer industry, adding an extended condensing device can effectively prevent low-temperature condensation.
3. Compression type: It adopts a nut internal thread compression type process connection, which is easy to disassemble and clean.
4. Screw in type: It adopts an external thread screw in process connection.
5. Flange type: Adopt a flat flange process connection.
6. Standard formula: This product is a new generation transmitter specially designed and manufactured to comply with the US FDA pharmaceutical standards in the pharmaceutical industry. The entire body is made of stainless steel material. It adopts a threaded bottom installation form and comes with a sanitary grade material installation base for customers, which can be installed tightly flush with the bottom of the tank body, achieving true hygiene.
5、 Technical indicators:
1. Clean the flat isolation membrane and comply with the 3A hygiene standard;
2. Adopting ceramic capacitive pressure sensors or diffused silicon pressure sensors;
3. Range: 0-4KPa~35MPa;
4. Power supply: 15-36VDC;
5. Temperature drift: 0.02% FS/° C;
6. Accuracy: 0.25%;
7. Shell protection: IP65;
8. Electrical connection: Cable type \ Hosman connector \ \ 2088 shell \ \ Waterproof box type optional;
9. Temperature: The electronic circuit board operates at -40~85 ℃; Sensitive components operate at -40~104 ℃; Storage temperature -40~85 ℃; With digital display -25~65 ℃ (normal operation); -40-85 ℃ (no damage);
10. Relative humidity: 0-95%;
11. Stability: ± 0.25% of the maximum range within 6 months;
12. Vibration effect: In any axial direction, at a frequency of 200Hz, the error is within ± 0.05%/g of the maximum range;
13. Load impact: As long as the voltage of the input transmitter is higher than 12V, there is no load impact in the load working area;
14. Installation position impact: The maximum zero position error that can be generated is not greater than 0.25kPa, which can be eliminated through calibration without affecting the measurement range; The relative rotation of the measuring body to the flange has no effect.
6、 Structural characteristics:
1. Shell material: SUS304;
2. Membrane material: SUS316L, ceramic;
3. Interface: 1? British thread, DN union and flange connection;
4. Lead method: aviation plug, Hirschmann connector;
5. Protection level: IP65.

7、 Precautions for use:
1. When the diaphragm pressure transmitter freezes in winter, anti freezing measures must be taken for the transmitter installed outdoors to prevent the liquid in the pressure inlet from expanding due to freezing volume and causing damage to the sensor.
2. When wiring, thread the cable through the waterproof joint (accessory) or flexible tube and tighten the sealing nut to prevent rainwater and other substances from leaking into the transmitter housing through the cable.
3. When measuring gas pressure, the pressure tap should be opened at the top of the process pipeline, and a sanitary transmitter should also be installed at the upper part of the process pipeline to allow the deposited liquid to be quickly injected into the process pipeline.
4. When measuring steam or other high-temperature media with a sanitary pressure transmitter, a condenser such as a buffer tube (coil) should be connected, and the operating temperature of the transmitter should not exceed the limit.
5. Note that the pressure tube of the sensor should be installed in a location with minimal temperature fluctuations.
6. When measuring liquid pressure, the installation position of sanitary pressure transmitters should avoid the impact of liquid (i.e. water hammer phenomenon) to prevent sensor damage caused by overpressure.
7. When measuring liquid pressure, the pressure tap should be opened on the side of the process pipeline to avoid sedimentation and slag accumulation.
8. To prevent sanitary pressure transmitters from coming into contact with corrosive or overheated media, and to prevent debris from depositing inside the conduit.

8Selection List:

Explosion proof cable sealing sleeve
Clamp flat film type... P
The user selects attachments, please use parentheses after the selection code
Indicate the code of the required attachment
For example:
ZW1088 □□□□□□□□
Please specify the name of the tested medium, working pressure, medium temperature, measurement range, etc. when placing an order. If you have any questions, please call our technical team or.

After-sales service
1. The instrument series products sold by Zhongwei ensure the sale of products and spare parts at the same price within two years, and provide corresponding free of charge according to the requirements of the demand.
2. If there are any quality problems with the products provided by our company within one year (excluding vulnerable parts or accessories), we will be responsible for free repairs and provide free skill training for the employees of the demand side.
3. Due to quality issues with the products provided by our company, after verification by our technical department, we will dispatch professional technicians to the site to handle the problem until customer satisfaction is achieved.
4. Outside the warranty period, the product will be returned to the company for repair or sent to the user for repair.
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