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LD300Series
Differential Pressure, Flow, Absolute Pressure, Gage Pressure and Level Transmitters
| Transmitter's Applications |
Differential Pressure - LD300D and LD300H Series
Pressure is applied to high and low sides and differential pressure is measured. High static pressure is supported by LD300H models.
Flow - LD300D and LD300H Series
The differential pressure is generated by a primary flow element and the square root function supplies the flow measurement.
Absolute Pressure - LD300A Series
The pressure is measured at the high side of the transmitter and the low side is at zero absolute reference due to a sealed chamber with vacuum applied.
Gage Pressure - LD300M Series
The pressure is measured at the high side of the transmitter and the low side is open to the atmosphere, providing true local atmospheric reference.
Level - LD300L Series
The transmitter has a flange mounted unit with a flush diaphragm for direct installation on vessels. Extended diaphragms are also available.
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| Features |
- ± 0.04% high performance option;
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± 0.2% of URL stability guarantee for 12 Years;
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120:1 rangeability;
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Span as small as 50 Pa (0.2 inH2O) up to a range limit of 40 MPa (5800 psi);
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Up to 52 MPa static pressure (7500 psi);
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Direct digital capacitance sensing (no A/D conversion);
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True non-interactive zero and span;
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Local zero and span adjustment;
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Remote calibration and parameterization;
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Transfer functions: linear, V x, V x and V x ;
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Tank linearization;
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Alphanumerical LCD indication;
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Small and lightweight;
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Explosion proof and weather proof housing approved (IP67);
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Intrinsically safe certification;
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Signal simulation for loop tests;
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Non-volatile flow totalization;
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Configurable user unit;
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Configurable local adjustment;
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EMC (Electromagnetic Compatibility) according to IEC 61000-6-2, IEC 61000-6-4 and IEC 61326;
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Write protection function;
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Three protocols options: HART®, FoundationTM Fieldbus, PROFIBUS PA.
- Supported by DD, DDL and FDT/DTM
For all features, technical characteristics, performance, specifications and ordering code, see LD300 Series catalog.

HART® - 4 to 20 mA - LD301 Models
- Update output current in 100 ms with 0.75 µA/bit resolution;
- Improved performance due to dedicated math co-processor;
- Multi-drop operation mode;
- PID control function;
- Supports DTM and EDDL;
- Bi-directional flow measurement;
- With FMEDA analysis and MTBF of 244 years.

FoundationTM Fieldbus - LD302 Models
- 17 different types of function blocks for control strategies and advanced diagnostics;
- Up to 20 function blocks;
- Execution of up to 29 external links;
- 12 mA consumption;
- Dynamic block instantiation improves interchangeability;
- Fieldbus Foundation registered and ITK approved;
- MVC enabled;
- MTBF of 186 years.
- 12mA consumption;
- Function blocks for analog input and totalization;
- Integrated to Simatic PDM;
- Supports DTM and EDDL;
- Profile 3.0 improves interchangeability;
- MTBF of 186 years
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