Flush Diaphragm Pressure Transducers
Flush diaphragm pressure transducers mount the sensing diaphragm level with the process connection, eliminating the cavity and dead volume where viscous, pasty or crystallizing media can collect and block a standard pressure port. The design suits food, dairy, beverage, pharmaceutical and chemical processes, as well as pulp, sludge, adhesive and polymer duties. PRESSUREPOINT builds these instruments with 316L stainless steel wetted parts, hygienic clamp and flange connections, and smooth surfaces that are practical to clean in place. Outputs include 4-20mA, 0-10V and RS485 Modbus, with ranges from vacuum to 600 bar and media temperatures up to +125°C. Factory-direct supply with custom connections, surface finish and ranges.
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Why Flush Diaphragm Pressure Transducers
Flush diaphragm pressure transducers mount the sensing diaphragm level with the process connection, eliminating the cavity and dead volume where viscous, pasty or crystallizing media can collect and block a standard pressure port. The design suits food, dairy, beverage, pharmaceutical and chemical processes, as well as pulp, sludge, adhesive and polymer duties. PRESSUREPOINT builds these instruments with 316L stainless steel wetted parts, hygienic clamp and flange connections, and smooth surfaces that are practical to clean in place. Outputs include 4-20mA, 0-10V and RS485 Modbus, with ranges from vacuum to 600 bar and media temperatures up to +125°C. Factory-direct supply with custom connections, surface finish and ranges.
- Dead-space-free design — diaphragm is flush with the process connection, no cavity for media to collect
- 316L stainless steel wetted parts with smooth surfaces for hygienic and cleaning-in-place duty
- Suitable for viscous, pasty, pulpy and crystallizing media: food, dairy, chemical, pulp and sludge
- Clamp (tri-clamp), flange, G-thread with flush face and custom process connections
- 4-20mA, 0-10V and RS485 Modbus outputs, ranges from vacuum (-1 bar) to 600 bar
- Media temperatures to +125°C, CE marked, IP65/IP67 rated
Choosing a Flush Diaphragm Pressure Transducer
Key specification decisions
- Process connection — clamp fittings suit hygienic lines that are dismantled for cleaning; flanges and flush-face threads suit permanent industrial mounting.
- Wetted materials & finish — 316L with smooth surface finish for food and pharma; confirm finish grade and any elastomer sealing requirements with the factory.
- Range — pick a range where normal operating pressure sits in the middle third; flush designs are commonly specified at 0-6 to 0-40 bar for tank and line duty.
- Temperature & cleaning — check both process temperature and washdown or steam-cleaning conditions before selecting the build.
- Output — 4-20mA for PLC and long runs, 0-10V for local control, RS485 Modbus for multi-drop instrumentation.
Typical applications
- Food & beverage — line and tank pressure on dairy, brewing, juice and sauce processes where hygiene matters.
- Pharmaceutical & biotech — pressure on clean process lines, vessels and filtration skids.
- Pulp, paper & wastewater — pressure on fibrous slurries, sludge and high-solids media that clog standard ports.
- Adhesives, paints & coatings — monitoring viscous, thixotropic and curing media in transfer and dosing systems.
- Polymer & rubber processing — melt and transfer pressure where flush mounting keeps the port clear.
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FAQ
Questions Buyers Ask
Why choose a flush diaphragm over a standard threaded transducer?
A flush diaphragm sits level with the process connection, so there is no cavity or dead volume where viscous, pasty or crystallizing media can collect and set. Standard threaded sensors with a small pressure port are prone to clogging in those applications.
Is a flush diaphragm transducer suitable for food and pharmaceutical use?
The wetted design uses 316L stainless steel with smooth surfaces and hygienic process connections such as clamp fittings, so it is suitable for food, dairy, beverage and pharmaceutical lines. Confirm the surface finish, connection standard and cleaning regime with our engineers for your specific duty.
What pressure ranges are available?
From vacuum (-1 bar) to 600 bar, with common ranges for food and chemical duty such as 0-6, 0-10, 0-16, 0-25 and 0-40 bar. Custom ranges are set at the factory.
Can the sensor handle cleaning temperatures?
Standard builds handle media temperatures from -40°C to +125°C. If your process uses hot washdown or steam cleaning, tell us the cleaning temperature and duration so we can confirm a suitable configuration.
Which outputs and connections are available?
4-20mA, 0-10V and RS485 Modbus outputs, with clamp (tri-clamp), flange, G-thread with flush face and custom process connections. CE marked, IP65/IP67 rated.