Active Member
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[China]
Address: No.21, Lane 697, Guangfulin Road, Songjiang District, Shanghai, China
Contact name:Nancy Zhao
Melan Measurement & Control Instruments (Shanghai) Co.,Ltd. |
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Intelligent 4-20mA Diffused Silicon Smart Pressure Transmitter for Industrial Field
1. Introduction:
Diffusion silicon pressure transmitter is a typical and commonly used pressure measuring instrument, which consists of two parts: one is the detection element, i.e. the diffusion cinnamon piezoresistive pressure sensor, which is responsible for converting the physical quantity pressure signal to the voltage signal in the work site; the other is the signal processing circuit with multiple functions, which is responsible for converting the physical quantity pressure signal to the voltage signal. The output voltage signal of the sensor is transformed by amplification and two-wire signal processing, and then the standard signal is output. Because of its high measurement accuracy and fast dynamic response, it is widely used in all walks of life.
2. Working Principle:
Based on the piezoresistive effect of single crystal cinnamon, an elastic component is fabricated by advanced processing technology in a specific direction. Four strain resistors with equal resistance are fabricated by integrated circuit technology in their proper positions and connected to the Wheatstone Bridge. When a constant voltage (current) is applied to the bridge, when there is pressure (differential pressure) on the elastic element, the transmitter outputs a voltage signal linearly proportional to the pressure given by the medium, and then amplifies the voltage signal through an electronic circuit and converts it into a standard two-wire signal. According to its working principle, the main source of temperature drift is the temperature drift of the sensor part. Next, the working principle and characteristics of the sensor part of the pressure transmitter will be analyzed.
3. Technical Parameters
| Signal Output | 0~5V,1~5V, 4-20mA, 0-10mA, 1-10KHz |
| Pressure Range | -0.1~0~0.02~100MPa |
| Compensation Temperature | -10~70℃ |
| Medium Temperature | -40~125℃ |
| Ambient Temperature | -40~85℃ |
| Shell Protection | IP65 |
| Pressure Type | Meter Pressure, Absolute Pressure, Sealing Pressure |
| Accuracy | ±0.1%, ±0.3%, ±0.5% |
| Stability | ≤±0.5%FS per year |
| Zero Temperature Drift | ±0.03%FS per year |
| Overload Pressure | 200%FS |
| Fixed Frequency | 5KHz~650KHz |
4. Configuration
| Type | Specification Code | Illustration |
| ML2¨¨¨A | --------------------------------- | Pressure Transmitter |
| Transducer | 0-------------------------------- | Diffused Silicon Transducer |
| Accuracy | 8-------------------------------- | ±0.5% |
| Output | C-------------------------------- | 4-20mA |
| G-------------------------------- | Other Requirements,Contact Us. | |
| A-------------------------------- | ||
| Contact Medium Mode | G-------------------------------- | High Temperature Heat Radiation Type(0-200℃) |
| P-------------------------------- | Flat Diaghragm Contact Type | |
| L-------------------------------- | Thread Connection * | |
| Connection Mode | K-------------------------------- | Clamp Connection |
| M-------------------------------- | M20x1.5 * | |
| Q-------------------------------- | Other Thread Connection (Note 1) | |
| Measuring Range | 1-------------------------------- | 0-5~35KPa |
| 2-------------------------------- | 0-35~100KPa | |
| 3-------------------------------- | 0-50~200KPa | |
| 4-------------------------------- | 0-100~350KPa | |
| 5-------------------------------- | 0-200~700KPa | |
| 6-------------------------------- | 0-0.5~2.1MPa | |
| 7-------------------------------- | 0-1~3.5MPa | |
| 8-------------------------------- | 0-3~7MPa | |
| 9-------------------------------- | 0-7~21MPa | |
| 0-------------------------------- | 0-15~40MPa | |
| Y-------------------------------- | Specific Range | |
| Display Header | L-------------------------------- | Common LED Header |
| Z-------------------------------- | Pointer Header | |
| N-------------------------------- | No Header * | |
| Electrical Connection | 5-------------------------------- | M20x1.5 Waterproof Concentrator |
| Power Supply | -A-------------------------------- | 24VDC |
| -B-------------------------------- | 12VDC | |
| Additional Type | -NF1---------------------------- | Ex-proof Certificate: Exd II CT6 |
| -NS1---------------------------- | Intrinsic Safety Type: Exi II CT4 | |
| -M-------------------------------- | Other Requirements (Note2) | |
| Remarks: | ||
| e.g.:ML208CALM6N-A-NF1 0-1.6MPa | ||
| Note1: Please indicate the thread size behind type if you choose this code | ||
| Note2: Please note in order | ||
| *: Standard | ||
5. Pressure Level Transmitter
Pressure Transmitter
Differential Pressure Transmitter
Capacitance Level Transmitter
Hydrostatic Level Transmitter
Submersible Level Transmitter
