The TK3051 Series Pressure Transmitter is designed for industrial pressure and liquid level measurement. Differential pressure, gauge pressure, absolute pressure and liquid level models are available for different process conditions. The isolation diaphragm and fill-fluid system separates the process medium from the sensing element and electronics, while the digital circuit processes, corrects and transmits the signal.
The series includes the 3051CD differential pressure transmitter, 3051CG gauge pressure transmitter, 3051CA absolute pressure transmitter, 3051L liquid level transmitter and 3051T pressure transmitter. High-temperature/high-pressure, sanitary and other configuration options are also available for petroleum, chemical, electric power, food, paper-making and municipal engineering applications.
- Process pressure measurement for liquid, gas and steam.
- Liquid level measurement in vessels and storage tanks.
- Pressure measurement under high-temperature, high-pressure or special process connection conditions.
- Installations requiring remote diaphragm seals, flange connections or mounting frames.
- Control systems using HART or PROFIBUS-PA communication.
- Industrial sites requiring hazardous-area certification.
- Multiple measurement types: Differential, gauge, absolute pressure and liquid level models are available for different process conditions.
- Isolated pressure transfer: The isolation diaphragm and fill-fluid system separate the process medium from the sensing element.
- Digital signal processing: The electronic circuit board uses an ASIC (application-specific integrated circuit) for digital processing, linearization and output conversion.
- Smart communication: Standard output is available as 4-20 mA with a superimposed HART signal; PROFIBUS-PA output is also available.
- Data retention: Configuration data and correction coefficients are stored in permanent EEPROM (electrically erasable programmable read-only memory) and retained after power loss.
- Flexible materials: Isolation diaphragms are available in 316L stainless steel, Hastelloy C-276, Monel or tantalum.
- Field configuration options: Digital liquid crystal meter, remote transmitting assemblies, integrated valve blocks, mounting frames and various flange connections are available.
- Hazardous-area options: Ex ia IIC T4/T6 intrinsic safety and Ex d IIC T4/T6 explosion suppression configurations are available.
| Feature |
Details |
| Sensing structure |
The sensing diaphragm is glass-sealed, and process pressure is transferred through the isolation diaphragm and fill fluid |
| Reference accuracy |
3051C and 3051T models are available with ±0.05%, ±0.075% or ±0.1% of span |
| Response time |
Total response time is 100 ms with HART output |
| Self-check and diagnostics |
Continuous self-checking, HART diagnostics and field parameter checking are supported |
| Indication |
Optional digital liquid crystal meter for pressure, flow, liquid level or engineering unit display |
| Housing protection |
NEMA 4X, IP65 and IP66 housing configurations are available |
| Model |
Type |
Typical use |
| 3051CD |
Differential pressure transmitter |
Differential pressure, flow or pressure difference measurement |
| 3051CG |
Gauge pressure transmitter |
Pressure measurement referenced to atmospheric pressure |
| 3051CA |
Absolute pressure transmitter |
Pressure measurement referenced to absolute vacuum |
| 3051L |
Liquid level transmitter |
Liquid level and liquid column pressure measurement |
| 3051T |
Pressure transmitter |
Gauge or absolute pressure measurement |
| 3051H / 3051HG |
High-temperature/high-pressure models |
High-temperature and high-pressure process measurement |
| Model |
Pressure range |
| 3051C differential pressure |
0.1 kPa to 21 MPa, with the exact range determined by the range code |
| 3051T gauge/absolute pressure |
0.12 kPa to 120 MPa, with the exact range determined by pressure type and range code |
| 3051L liquid level |
0.4 kPa to 2.1 MPa, with the exact range determined by the range code |
| Range adjustment |
Zero and span can be set within the corresponding range limits; the selected range cannot be below the specified minimum range |
| Code |
Output |
Description |
| A |
4-20 mA + HART |
4-20 mA analog signal with a superimposed HART digital signal |
| B |
PROFIBUS-PA |
For control systems supporting PROFIBUS-PA |
| Item |
Specification |
| Ambient temperature |
-40 to 85 °C; -20 to 80 °C with integrated meter |
| Storage temperature |
-46 to 110 °C; -40 to 85 °C with integrated meter |
| Process temperature |
Depends on model, process connection, fill fluid and measurement side. A sensor filled with silicone oil can operate from -40 to 121 °C, while a traditional flange configuration can operate from -40 to 149 °C |
| 3051CD static pressure |
3.45 MPa to 24.8 MPa; option P9 raises the limit to 31.0 MPa, depending on the range |
| 3051T impact pressure |
13 MPa for ranges 3-6; 175 MPa for ranges 7-10 |
| Item |
Available options |
| 3051C / 3051T process interface |
1/4-18 NPT, 1/2-14 NPT and other threaded connections |
| 3051L high-pressure side |
2, 3 or 4 inch ANSI/ASME Class 150, 300 or 600 flanges; DIN flange configurations are also available |
| Isolation diaphragm |
316L stainless steel, Hastelloy C-276, Monel or tantalum |
| Fill fluid |
Silicone oil; inert liquid (halogenated hydrocarbon) available |
| Drain/vent valve |
316 stainless steel, Hastelloy C or Monel |
| O-ring |
Fluorine rubber or PTFE (polytetrafluoroethylene) |
| Housing |
Aluminum with polyurethane coating or 316L stainless steel |
- Digital liquid crystal meter.
- One or two remote transmitters, with direct installation, capillary type or fully welded systems.
- Traditional flanges, remote diaphragm flanges, threaded connections and installation frames.
- Integrated valve blocks and selectable flange, drain/vent valve and joint materials.
- Zero/range adjustment, transient voltage protection, customized software, static pressure testing and cleaning.
- External grounding, inspection certificates, material traceability certificates and hazardous-area certification.
- Direct installation.
- Remote diaphragm-seal installation.
- Traditional flange installation.
- Mounting frame for 2-inch pipeline installation.
- Panel mounting frame.
- 3051L liquid level flange and protruding diaphragm installation.
3051C and 3051T models can use 1/4-18 NPT or 1/2-14 NPT connections according to the field interface. The 3051L liquid level model can be configured with a high-pressure-side flange, a low-pressure-side pressure connection and different protruding diaphragm lengths. The pipeline size, panel space and transmitter process interface should be confirmed when selecting the mounting structure.
- TK3051CD differential pressure transmitter.
- TK3051CG gauge pressure transmitter.
- TK3051CA absolute pressure transmitter.
- TK3051L liquid level transmitter.
- TK3051T pressure transmitter.
- TK3051H high-temperature/high-pressure pressure transmitter.
- TK3051F sanitary pressure transmitter.
- TK3051P high-temperature anti-corrosion pressure transmitter.
- Measurement type: differential, gauge, absolute pressure or liquid level.
- Media and state: liquid, gas or steam; identify corrosive, crystallizing or particulate media when applicable.
- Range, maximum working pressure, static pressure and impact pressure.
- Process temperature, ambient temperature and installation position.
- Process connection, flange standard, pipeline or vessel dimensions, and insertion or protruding length.
- Required isolation diaphragm material, fill fluid, O-ring and housing material.
- Output signal, communication protocol, display, remote transmitting and installation frame requirements.
- Hazardous-area classification, gas group, temperature class and required certification.
- Remote diaphragm-seal assemblies and remote transmitting flanges.
- 3051L liquid level flanges and protruding diaphragm assemblies.
- Integrated valve blocks, drain/vent valves and installation bolts.
- Mounting frames for 2-inch pipelines and panels.
- Digital liquid crystal meters, process connection parts and external grounding assemblies.
