Melan Measurement & Control Instruments (Shanghai) Co.,Ltd.
MELAN MEASUREMENT & CONTROL INSTRUMENTS (SHANGHAI) CO., LTD.
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Capacitive Pressure Sensor Transmitter 3351, Differential Pressure Sensor
1. Overview
Capacitive pressure transmitter (capacitive type pressure transducer) is a pressure transmitter that uses a capacitive sensing element to convert the measured pressure into an electrical output with a certain relationship. It is characterized by low input energy, high dynamic response, small natural effects, and good environmental adaptability. It generally uses a round metal film or metal-plated film as an electrode of the capacitor. When the membrane is deformed by pressure, the capacitance formed between the membrane and the fixed electrode changes. Through the measuring circuit, the electrical signal with a certain relationship with the voltage can be output. Capacitive pressure sensor is a capacitive sensor with variable pole distance. It can be divided into single capacitive pressure sensor and differential capacitive pressure sensor.
2. Configuration
| Type | Specification Code | Illustration | |||
| ML3¨¨¨C | --------------------------------- | New Type Liquid Level, Pressure Transmitter | |||
| Accuracy | 3-------------------------------- | ±0.5% | |||
| 0-------------------------------- | ±0.075% | ||||
| Output | 5-------------------------------- | 4-20mA, HART | |||
| Sensor | 1-------------------------------- | Capacitive Sensor | |||
| C-------------------------------- | |||||
| Measuring Range | 3-------------------------------- | 0-1.3~7.5KPa(0-127~762mmH2O) | |||
| 4-------------------------------- | 0-6.2~37.4KPa(0-635~3810mmH2O) | ||||
| 5-------------------------------- | 0-31.1~186.8KPa(0-3175~19050mmH2O) | ||||
| 6-------------------------------- | 0-117~690KPa(0-1.2~7Kgf/cm2) | ||||
| 7-------------------------------- | 0-0.345~2.068MPa(0-3.5~21Kgf/cm2) | ||||
| 8-------------------------------- | 0-1.170~6.890MPa(0-12~70Kgf/cm3) | ||||
| Part Material to Connect Medium | Process Connection | Vent/Drain Valve | Isolation Diaphragm | Filling Liquid | |
| 2-------------------------------- | 316 Stainless Steel | 316 Stainless Steel | 316 Stainless Steel | Silicone Oil | |
| 3-------------------------------- | Hastalloy C | ||||
| 4-------------------------------- | Monel | ||||
| 5-------------------------------- | Tantalum | ||||
| 3-------------------------------- | Hastalloy C | Hastalloy C | Hastalloy C | ||
| 5-------------------------------- | Tantalum | ||||
| 4-------------------------------- | Monel | Monel | Monel | ||
| Display Header | D-------------------------------- | Multiple Parameters and Methods Digital LED Display Header | |||
| N-------------------------------- | No Display Header | ||||
| Pipe Connection | 4-------------------------------- | 1/2 NPT Female Thread | |||
| 7-------------------------------- | 1/2 NPT Male Thread | ||||
| 8-------------------------------- | G1/2 Male Thread | ||||
| 9-------------------------------- | M20*1.5 Male Thread | ||||
| Electrical Interface | 5-------------------------------- | M20*1.5 Waterproof Concentrator | |||
| Additional Type | -NF1---------------------------- | Ex-proof Security Certification: Exd II CT6 | |||
| -NS1---------------------------- | Intrinsic Safety Certification: Exi II CT4 | ||||
| -Q------------------------------- | Other conventions are available | ||||
| Remarks: | |||||
| e.g.:ML3051C-42D95-NF1 | |||||
| *: Standard | |||||
3. Dimension
4. Electrical Connection