Melan Measurement & Control Instruments (Shanghai) Co.,Ltd.
MELAN MEASUREMENT & CONTROL INSTRUMENTS (SHANGHAI) CO., LTD.
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Explosion Proof Pressure Transmitter LCD Display Diffusion Silicon Pressure Transmitter
1. Introduction
ML2000W series diffusion silicon pressure transmitter adopts the advanced transducer as sensitive element. It applies shielding and eliminating process of new hit-resistant capacitance, RF, over current and strong voltage signal. The subsequent circuit has higher stability and capacity of resisting disturbance because the peripheral circuit layout and component selection are more reasonable than American TI (BB) company operational amplifier.
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 Parameter
① Power supply non polar connection(Only analog circuit, 24VDC power supply)
② Field or Outside lightning prevention design
3. Configuration
| Type | Specification Code | Illustration |
| ML2¨¨¨W | --------------------------------- | Diffused Silicon Pressure Transmitter |
| Transducer | 0-------------------------------- | Diffused Silicon Transducer |
| Accuracy | 8-------------------------------- | ±0.2% |
| 5-------------------------------- | ±0.1% | |
| Output | 8-------------------------------- | 4-20mA |
| 1-------------------------------- | 4-20mA, HART | |
| W-------------------------------- | ||
| Contact Medium Mode | F-------------------------------- | Remote Transmission Flange Installation Type |
| G-------------------------------- | High Temperature Heat Radiation Type(0-200℃) | |
| P-------------------------------- | Flat Diaghragm Contact Type | |
| L-------------------------------- | Thread Connection * | |
| Connection Mode | 2-------------------------------- | Flange Connection (Note 1) |
| 3-------------------------------- | M20x1.5 * | |
| 4-------------------------------- | Other Thread Connection (Note 2) | |
| 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 (Note 3) | |
| Display Header | D-------------------------------- | Multiple Parameters & Modes Digital LED Display Header (Note 4) |
| 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(Note5) | |
| Remarks: | ||
| e.g.:ML2088WLM6L5-A-NF1 0-1.6MPa | ||
| e.g.:ML2051WLM7D5-B-NS1 0-2.5MPa | ||
| Note1: Please indicate the flange size behind type if you choose this code | ||
| Note2: Please indicate the thread size behind type if you choose this code | ||
| Note3: Please indicate specific range behind type | ||
| Note4: Only output code1 is available | ||
| Note5: Please note in order | ||
| *: Standard | ||