Pressure Transmitters South Africa | Industrial Pressure Transmitters for Sale
Reliable Pressure Measurement Solutions for Industrial, Process, Water, Mining & Automation Applications
Nkokhi Group supplies pressure transmitters in South Africa for industrial automation, process control, water treatment, mining, manufacturing, hydraulic systems, pumps, compressors and other demanding applications.
Our pressure measurement solutions are available in different pressure ranges, process connections, output signals and communication protocols, including 4–20 mA, HART, 0–10 V, IO-Link, PROFIBUS PA and FOUNDATION Fieldbus, depending on the selected manufacturer and model.
Whether you need a pressure transmitter for sale in South Africa, a replacement transmitter for an existing installation, or a complete pressure measurement solution for a new automation project, Nkokhi Group can assist with model selection and sourcing.
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Pressure Transmitters for Sale in South Africa
A pressure transmitter measures pressure and converts the measured pressure into an electrical signal that can be used by a PLC, SCADA system, DCS, HMI, data acquisition system or industrial controller.
Pressure transmitters are commonly installed to monitor:
- Water pressure
- Hydraulic pressure
- Pneumatic pressure
- Oil pressure
- Air pressure
- Pump discharge pressure
- Process pressure
- Tank pressure
- Steam pressure
- Gas pressure
- Filtration pressure
- Compressor pressure
- Mining process pressure
- Chemical process pressure
For general industrial automation applications, 4–20 mA pressure transmitters remain a widely used choice because the signal integrates easily with industrial control systems. HART-enabled transmitters add digital communication and configuration capabilities over the analogue loop.
For related instrumentation and automation products, visit Nkokhi Group’s Industrial Automation Sensors page.
Why Choose Nkokhi Group for Pressure Transmitters?
Nkokhi Group provides sourcing and supply solutions for industrial instrumentation and automation equipment throughout South Africa.
We can assist customers with:
- Pressure transmitter selection
- Replacement pressure transmitters
- OEM-equivalent alternatives
- Industrial pressure sensors
- Process instrumentation
- 4–20 mA transmitters
- HART transmitters
- Differential pressure transmitters
- Gauge pressure transmitters
- Absolute pressure transmitters
- Hydrostatic pressure transmitters
- High-pressure transmitters
- Pressure transmitters for water treatment
- Pressure transmitters for mining
- Pressure transmitters for pumps and compressors
Where an exact replacement is required, provide the manufacturer, model number, part number, pressure range, output signal and process connection so that the correct specification can be sourced.
Popular Pressure Transmitter Models
Nkokhi Group can source pressure transmitters from major international manufacturers and product families, subject to application and availability.
WIKA Pressure Transmitters
Popular WIKA ranges include:
- WIKA A-10
- WIKA S-10
- WIKA S-11
- WIKA IPT-20
- WIKA IPT-21
- WIKA differential pressure transmitters
- WIKA industrial pressure sensors
WIKA describes pressure sensors/transmitters as devices that convert physical pressure into an electrical variable, with ranges covering general industrial, mobile machinery, refrigeration, food and other specialist applications.
The WIKA IPT-20/IPT-21 process transmitter range supports configurations including 4–20 mA, 4–20 mA HART, PROFIBUS PA and FOUNDATION Fieldbus, with options for hazardous-area applications.
Endress+Hauser Pressure Transmitters
Popular Cerabar and related models include:
- Cerabar PMP11
- Cerabar PMP21
- Cerabar PMP23
- Cerabar PMP50
- Cerabar PMP51
- Cerabar PMP71
- Cerabar PMP71B
- Cerabar PMP43
- Deltapilot FMB70
For example, the Endress+Hauser Cerabar PMP50 is available with 4–20 mA HART communication, while the PMP71B offers advanced pressure measurement capabilities, multiple process connections and communication options.
Siemens Pressure Transmitters
Common Siemens instrumentation families include:
- Siemens SITRANS P
- SITRANS P320
- SITRANS P420
- SITRANS P DS III
- Siemens differential pressure transmitters
- Siemens process pressure transmitters
Emerson / Rosemount Pressure Transmitters
Popular Rosemount ranges include:
- Rosemount 3051
- Rosemount 2051
- Rosemount 2088
- Rosemount 2090
- Rosemount 3051S
- Rosemount differential pressure transmitters
- Rosemount gauge pressure transmitters
- Rosemount absolute pressure transmitters
Other Manufacturers
Depending on the application, Nkokhi Group can also assist with products from manufacturers such as:
- ABB
- Honeywell
- Yokogawa
- Schneider Electric
- Danfoss
- SICK
- IFM
- Pepperl+Fuchs
- VEGA
- Baumer
- WIKA
- Siemens
- Endress+Hauser
- Emerson / Rosemount
Types of Pressure Transmitters
Gauge Pressure Transmitters
Gauge pressure transmitters measure pressure relative to atmospheric pressure and are widely used for pumps, compressed air, hydraulic systems and general industrial applications.
Absolute Pressure Transmitters
Absolute pressure transmitters measure pressure relative to a vacuum reference and are suitable for applications where atmospheric pressure variations must not affect the measurement.
Differential Pressure Transmitters
Differential pressure transmitters measure the difference between two pressure points.
Typical applications include:
- Filter monitoring
- Flow measurement
- Level measurement
- Pump monitoring
- Air handling systems
- Process control
High-Pressure Transmitters
High-pressure transmitters are designed for applications where conventional low-pressure sensors are unsuitable, including hydraulic and specialised industrial equipment.
Hydrostatic Pressure Transmitters
Hydrostatic pressure transmitters can be used for liquid-level measurement in tanks, reservoirs and water-treatment systems. Endress+Hauser’s Deltapilot FMB70, for example, is designed specifically for hydrostatic level measurement.
Hygienic Pressure Transmitters
Hygienic pressure transmitters are designed for food, beverage, pharmaceutical and other sanitary applications. Endress+Hauser’s Cerabar PMP43 includes hygienic process connections and 4–20 mA/HART and IO-Link communication options.
Pressure Transmitter Output Signals
When selecting a pressure transmitter, the output signal must match the control system.
4–20 mA
One of the most common industrial analogue outputs.
Suitable for:
- PLC analogue inputs
- SCADA systems
- DCS systems
- Process controllers
- Remote monitoring
4–20 mA HART
Combines the conventional 4–20 mA signal with digital HART communication for configuration, diagnostics and additional device information.
0–10 V
Voltage-output pressure transmitters are commonly used in certain automation and control applications.
IO-Link
IO-Link-enabled pressure sensors provide digital communication and additional diagnostic and configuration capabilities.
PROFIBUS PA / FOUNDATION Fieldbus
These communication options are used in process automation installations requiring digital fieldbus integration.
Pressure Transmitter Applications in South Africa
Nkokhi Group supplies solutions suitable for a broad range of South African industries.
Mining
Pressure transmitters can be used on:
- Hydraulic systems
- Dewatering systems
- Pumps
- Compressors
- Process plants
- Filtration systems
- Slurry systems
- Mobile mining equipment
Water & Wastewater
Applications include:
- Water treatment plants
- Pump stations
- Reservoirs
- RO plants
- Filtration
- Pipeline pressure monitoring
- Water distribution systems
Industrial Automation
Pressure transmitters can connect to:
- PLC systems
- HMI systems
- SCADA systems
- DCS systems
- Remote telemetry units
- Industrial control panels
Manufacturing
Pressure measurement is used in:
- Production machinery
- Pneumatic systems
- Hydraulic systems
- Compressors
- Process equipment
- Cooling systems
Oil, Gas & Process Industries
Depending on the required certification and application, specialised transmitters can be supplied for demanding process environments, including hazardous-area applications.
How to Select the Correct Pressure Transmitter
Before requesting a quotation, confirm the following specifications:
1. Pressure range
Example: 0–10 bar, 0–25 bar, 0–100 bar or another required range.
2. Pressure type
Gauge, absolute or differential pressure.
3. Output
4–20 mA, HART, 0–10 V, IO-Link, PROFIBUS PA or FOUNDATION Fieldbus.
4. Process connection
Examples include G1/4, G1/2, 1/4 NPT, 1/2 NPT or flange connections.
5. Electrical connection
Specify the required connector, cable or terminal arrangement.
6. Wetted materials
Important when measuring corrosive chemicals, aggressive fluids or specialised process media.
7. Temperature
Confirm both ambient and process temperatures.
8. Accuracy
Select the accuracy appropriate for the control or measurement requirement.
9. Hazardous-area certification
ATEX, IECEx or other certification may be required for specific installations.
10. Communication protocol
Ensure the transmitter communicates correctly with the existing PLC, DCS or SCADA system.
Tips When Buying Pressure Transmitters
Tip 1 – Do not select only by pressure range.
The output signal, connection, accuracy, temperature rating and wetted materials are equally important.
Tip 2 – Check the existing transmitter.
Photograph the nameplate and provide the complete model or part number when requesting a replacement.
Tip 3 – Match the PLC input.
A 4–20 mA transmitter is not automatically compatible with every control panel. Confirm the PLC analogue input specification.
Tip 4 – Consider HART.
HART can provide additional diagnostics and configuration functionality while retaining the standard 4–20 mA signal.
Tip 5 – Check hazardous-area requirements.
For classified areas, make sure the transmitter has the required certification.
Tip 6 – Consider the process media.
Chemical compatibility of the diaphragm and wetted parts is essential.
Tip 7 – Check the process connection.
Incorrect thread types or sizes can result in installation problems.
Tip 8 – Send the old transmitter details.
A clear photo of the existing instrument, nameplate and connection can significantly speed up identification.
Pressure Transmitters for PLC, HMI & SCADA Systems
Pressure transmitters are an important component of industrial automation systems.
A typical installation can operate as:
Pressure → Pressure Transmitter → 4–20 mA / HART → PLC → HMI / SCADA → Operator
This allows operators to monitor pressure continuously and configure alarms, trends and process-control functions.
Nkokhi Group can assist with pressure measurement requirements as part of broader PLC, HMI, SCADA and industrial automation projects.
Pressure Transmitter Replacement & Sourcing
If you have an obsolete or failed pressure transmitter, Nkokhi Group can assist in identifying a suitable replacement.
Send us:
- Manufacturer
- Model
- Part number
- Serial number, if available
- Pressure range
- Output
- Process connection
- Supply voltage
- Application
- Quantity required
- Photograph of the existing transmitter
We can then investigate the original specification, equivalent models and available sourcing options.
Request a Pressure Transmitter Quote
Looking for pressure transmitters in South Africa?
Send Nkokhi Group the required specifications or a photograph of the existing transmitter.
We can assist with sourcing industrial pressure transmitters, pressure sensors, 4–20 mA transmitters, HART transmitters, differential pressure transmitters and process pressure instruments for industrial, mining, water, manufacturing and automation applications.
Request a quotation from Nkokhi Group for your pressure transmitter requirement.
Frequently Asked Questions
What is a pressure transmitter?
A pressure transmitter is an instrument that measures pressure and converts the measurement into an electrical output signal used by industrial control and monitoring systems.
What is the most common pressure transmitter output?
4–20 mA is one of the most widely used analogue output signals in industrial automation and process control.
What is a 4–20 mA pressure transmitter?
It is a pressure transmitter that represents the measured pressure using a current signal between 4 and 20 mA. It can be connected to suitable PLC, DCS or SCADA analogue inputs.
What is a HART pressure transmitter?
A HART pressure transmitter combines a conventional 4–20 mA signal with digital communication, allowing additional configuration, diagnostics and device information.
Can Nkokhi Group supply pressure transmitters in South Africa?
Yes. Nkokhi Group can assist with sourcing pressure transmitters and industrial pressure sensors for applications throughout South Africa, subject to manufacturer availability and specifications.
Which pressure transmitter brands can Nkokhi Group supply?
Depending on the application, Nkokhi Group can source brands including WIKA, Siemens, Endress+Hauser, Emerson/Rosemount, ABB, Honeywell, Yokogawa, IFM, SICK, Danfoss, Pepperl+Fuchs and others.
Can you supply pressure transmitters for mining?
Yes. Pressure measurement equipment can be sourced for mining, hydraulic, water, pumping, filtration and process applications.
Can you identify a pressure transmitter from a photograph?
Yes. A clear photograph of the nameplate, model number and connections can help identify the required instrument.
What information should I provide when requesting a quotation?
Provide the manufacturer, model/part number, pressure range, pressure type, output signal, process connection, supply voltage, application and quantity.
About Nkokhi Group
Nkokhi Group is a South African industrial supply and technology company supporting customers with industrial automation, instrumentation, electrical, electronic and engineering products.
Our product sourcing capabilities cover industrial sensors, pressure measurement, PLC systems, HMI systems, SCADA equipment, automation components and other specialised industrial equipment.
For specialised requirements, customers can provide an existing part number, technical specification or photograph for identification and sourcing.