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Threaded Direct Mount Pressure Transmitter
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Threaded Direct Mount Pressure Transmitter
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The Threaded Direct Mount Pressure Transmitter is a smart industrial pressure transmitter designed for direct installation on pipelines, tanks, vessels, pumps, compressors, and process equipment. It is commonly used for gauge pressure and absolute pressure measurement of liquids, gases, and steam.
With threaded process connection options such as 1/2-14 NPT, M20×1.5, and G1/2A, this transmitter provides a compact and practical solution for standard pressure measurement points. It supports 4–20 mA DC output with HART communication, local LCD display, remote configuration, and optional accessories for different industrial installation requirements.
The threaded direct mount pressure transmitter is used to measure process pressure and convert it into a standard electrical signal for PLC, DCS, or other control systems. Compared with flange-mounted or remote seal transmitters, this type has a simpler structure and is directly connected to the process through a threaded pressure port.
It is suitable for common industrial pressure measurement applications where the medium is relatively clean and can be directly introduced to the transmitter process connection.
Typical applications include:
For applications involving corrosive, viscous, crystallizing, or easy-to-block media, diaphragm seal pressure transmitters or flanged pressure transmitters may be more suitable.
The threaded direct mount pressure transmitter can be supplied with standard industrial output for process automation systems.
| Output Type | Description |
|---|---|
| 4–20 mA DC | Standard analog pressure signal for PLC/DCS input |
| 4–20 mA DC + HART | Analog output with digital communication for configuration and diagnostics |
| Digital communication options | Available depending on model configuration and project requirements |
The 4–20 mA + HART option is widely used because it allows the transmitter to provide a stable analog signal while supporting remote parameter setting, diagnostics, and maintenance through a HART communicator or host system.
The transmitter can be installed directly into a process connection, valve, adapter, manifold, or pressure tapping point. This makes installation simple and compact.
Common process connection options include:
This type of transmitter is mainly used for:
Gauge pressure transmitters are suitable for most pipeline and equipment pressure applications. Absolute pressure transmitters are used when the measurement must be referenced to absolute vacuum, such as vacuum systems, sealed vessels, and low-pressure gas applications.
The threaded direct mount structure reduces installation space and is suitable for many standard pressure measurement points. It can be installed on pipelines, equipment nozzles, pressure valves, or instrument panels.
The transmitter can be equipped with a local display for reading pressure value, output current, percentage range, or other operating information, depending on configuration.
With HART communication, users can configure range, unit, damping, zero point, output mode, and diagnostic functions through a HART handheld communicator or host system.
For different process media, wetted parts and diaphragm materials can be selected according to corrosion compatibility. For common media, stainless steel is widely used; for corrosive service, special diaphragm materials may be required.
The transmitter is designed for pressure measurement loops in PLC and DCS systems, providing reliable output for process monitoring, alarm, control, and equipment protection.
| Item | Specification |
|---|---|
| Product Name | Threaded Direct Mount Pressure Transmitter |
| Product Type | Smart Pressure Transmitter |
| Typical Series | TK3051C-T Type Gauge / Absolute Pressure Transmitter |
| Measurement Type | Gauge Pressure / Absolute Pressure |
| Measured Media | Liquid, Gas, Steam |
| Output Signal | 4–20 mA DC / 4–20 mA DC + HART |
| Process Connection | 1/2-14 NPT, M20×1.5, G1/2A, or customized |
| Electrical Connection | M20×1.5, 1/2 NPT, or other options depending on housing |
| Display | Optional LCD display |
| Configuration | Local buttons / HART communicator / host system |
| Wetted Material | Stainless steel or other corrosion-resistant material options |
| Typical Installation | Direct threaded mounting on pipe, tank, vessel, valve, or adapter |
| Main Functions | Pressure measurement, signal output, remote configuration, diagnostics |
The threaded direct mount pressure transmitter can be selected according to the required pressure reference.
| Type | Description | Typical Use |
|---|---|---|
| Gauge Pressure Transmitter | Measures pressure relative to atmospheric pressure | Pipeline pressure, pump pressure, tank pressure, hydraulic pressure |
| Absolute Pressure Transmitter | Measures pressure relative to absolute vacuum | Vacuum systems, sealed vessels, gas systems, low absolute pressure applications |
A threaded gauge pressure transmitter is the most common type for industrial pressure monitoring. It is used when the process pressure is compared with atmospheric pressure.
Common applications:
A threaded absolute pressure transmitter is used when atmospheric pressure changes should not affect the measurement result.
Common applications:
Used for continuous pressure monitoring in water, gas, oil, steam, and chemical pipelines. The transmitter can be installed directly on a pressure tapping point or through a valve.
Suitable for pump outlet pressure, compressor discharge pressure, air pressure systems, and equipment protection loops.
Used for pressure monitoring on storage tanks, process vessels, reactors, separators, and auxiliary equipment.
For steam pressure measurement, a syphon, cooling element, or proper impulse connection is usually recommended to protect the transmitter from excessive temperature.
Suitable for hydraulic stations, pneumatic systems, compressed air networks, and industrial pressure control loops.
Can be used for compatible process media. If the medium is corrosive, viscous, crystallizing, or easy to block, material selection or diaphragm seal structure should be evaluated carefully.
Applied in pumping stations, filtration systems, water distribution lines, dosing systems, and industrial utility pressure measurement.
When selecting a threaded direct mount pressure transmitter, confirm the following information:
A threaded direct mount pressure transmitter is often used with different accessories depending on the operating condition.
Common accessories include:
Typical installation arrangement:
Process Connection → Needle Valve / Gauge Valve → Threaded Pressure Transmitter
For steam service:
Steam Line → Syphon / Cooling Element → Needle Valve → Threaded Pressure Transmitter
| Item | Threaded Direct Mount Pressure Transmitter | Flanged / Diaphragm Seal Pressure Transmitter |
|---|---|---|
| Process Connection | Threaded connection | Flange or diaphragm seal |
| Installation | Compact and simple | Larger structure, more process isolation |
| Suitable Media | Clean liquid, gas, steam | Corrosive, viscous, crystallizing, dirty media |
| Blockage Risk | Higher if medium is dirty or viscous | Lower with flush diaphragm or seal structure |
| Cost | Usually more economical | Usually higher |
| Typical Use | Standard pressure measurement | Difficult media or special process conditions |
For clean water, air, oil, gas, and standard steam applications, a threaded direct mount pressure transmitter is often a practical choice. For slurry, pulp, crystallizing liquid, corrosive chemical, or high-viscosity media, a diaphragm seal pressure transmitter should be considered.
SIYelectric supplies threaded direct mount pressure transmitters for industrial projects, replacement orders, and process instrumentation procurement. We can help confirm model code, pressure range, process connection, output signal, display requirement, electrical interface, and installation accessories based on your datasheet or operating conditions.
For accurate quotation, please provide:
SIYelectric can also support related accessories such as needle valves, gauge valves, two-valve manifolds, syphons, cooling elements, explosion-proof cable glands, tube fittings, adapters, and HART handheld communicators.
Available documents may include technical datasheet, certificate of conformity, inspection report, packing list, and commercial invoice, depending on order and project requirements.
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