Oil & Gas Smart Differential Pressure Transmitters
1. Overview
Differential pressure transmitters measure the difference between two pressures.
Differential pressure (DP) transmitter, also called differential pressure transducer. Differential pressure transmitters measure the difference between two pressures. Differential Pressure Transmitter converts pressure measurements, into a proportional 4-20 mA or a 1 – 5 Vdc output signal, that functions as the input to a controller, recorder, indicator or similar device.
This equipment will sense the difference in pressure, between two ports and produce an output signal, with reference to a calibrated pressure range.
The industrial differential pressure transmitters are made of two housings.
The pressure sensing element is housed in the bottom half, and the electronics are housed at the top half.
It will have two pressure ports marked as “High” and “Low”.
It is not compulsory that the high port will be always at high pressure and the low port always at low pressure.
This labeling has its relation to the effect of the port on the output signal.
2. Function Parameters
- Applicable Object: Liquid, gas, steam
- Measuring Range: 0~0.1KPa--0~40MPa
- Output Signal: 4-20mA
- Power Supply: 12~45VDC, 24VDC is general
- Load Characteristic: Relative with power supply. The load capability in certain power supply and voltage refers to Pic2. Load impedance RL and supply voltage VS relation: RL≤50(Vs-12)
- Indicating Meter: Multiple parameters and multiple methods LCD indicating header
- EX-proof: a. Exd Type ExdIICT6 b. Intrinsic Safety Type ExidIICT4
- Range & Zero: Outer continually adjustable
- Positive & Negative Shift: When zero passes positive and negative shift, upper limit and lower limit of measuring range cannot exceed 100% of measurement upper limit. The maximum positive shift is 500% that of minimum adjustment range; the maximum negative shift range is 600% that o minimum adjustment range.
- Temperature Range:
Working temperature range of amplifier: -29~+93℃(LT Type: -25~+70℃)
Filling silicon oil measuring element: -40~+104℃
Filling high temperature oil with flange transmitter: +15~+315℃
Common silicon oil: -40~+149℃
- Static Pressure: 4, 10, 25, 32MPa
- Humidity: Relative humidity 0~100%
- Volume Absorb Quantity: <0.16cm3
- Damping(Step Response): Continually adjustable between 0.2s to 1.67s when filling oil
3. Configuration
ML3000W Micro Differential Pressure Transmitter:
The max static pressure is 4MPa, the min measuring range is 0-0.125~1.5KPa.
They can shift to a negative pressure transmitter.
Medium:liquid, gas, steam.
| Type | Specification Code | Illustration |
| ML3¨¨¨W | --------------------------------- | Microdifferential Pressure Transmitter |
| Accuracy | 3-------------------------------- | ±0.5% |
| 0-------------------------------- | ±0.075% |
| Output | 5-------------------------------- | 4-20mA, HART |
| Sensor | 1-------------------------------- | Capacitive Sensor |
| | W-------------------------------- | |
| Measuring Mode | -Y-------------------------------- | Micro Pressure Type |
| -C-------------------------------- | Micro Differential Pressure Type |
| Measuring Range | 2-------------------------------- | 0-0.125~1.5KPa(0-12.5~150mmH2O) |
| 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 |
Installation Mode &
Vent/Drain Valve | A-------------------------------- | Tube Installation Bend Support |
| B-------------------------------- | Plat Installation Bend Support |
| C-------------------------------- | Tube Installation Level Support* |
| D-------------------------------- | L Support |
| N-------------------------------- | No Support |
| 1-------------------------------- | Up the Lateral Vent/Drain Valve |
| 2-------------------------------- | Down the Lateral Vent/Drain Valve |
| 3-------------------------------- | Rear Vent/Drain Valve* |
| Additional Type | M-------------------------------- | M20*1.5 Thread Electronic Interface with Waterproof Concentrator* |
| C-------------------------------- | NPT1/2 Impulse Interface & Impulse Pipe* |
| -NF1---------------------------- | Ex-proof Security Certification: Exd II CT6 |
| -NS1---------------------------- | Intrinsic Safety Certification: Exi II CT4 |
| -Q------------------------------- | Other conventions are available |
| Remarks: | | | | | |
| e.g.:ML3051W-C22DC3MC-NF1 | | | |
| *: Standard | | | | | |
4. Photos
Product Tags:
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LED Display Oil Gas Differential Pressure Transmitter Images
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