Diaphragm-Seal & Flange-Diaphragm Pressure Transmitter
- Diaphragm seal isolates the sensor from corrosive, viscous or crystallizing media
- Two process interfaces: flange-mounted or threaded diaphragm seal
- Based on our explosion-proof transmitter family: -0.1~60MPa, ≤±0.25%FS
- Output 4~20mADC; supply 12-32VDC; IP65
- Long-term stability <0.2%/year
Tell us your medium, range and process connection — we reply within 24 hours.
Factory-direct from WELK Meters
- Small MOQ Welcome
- OEM / ODM Support
- Reply Within 24 Hours
Overview
The diaphragm-seal and flange-diaphragm pressure transmitters are process-sealed versions of our explosion-proof pressure transmitter family: a diaphragm seal keeps the measured medium away from the sensing element while the pressure is transferred to the transmitter, which shares the family specifications of -0.1~60MPa range, ≤±0.25%FS accuracy and a 4~20mADC output.
Two process interfaces are offered: the flange-diaphragm version mounts directly on a vessel or pipe flange, while the diaphragm-seal version uses a threaded diaphragm-seal connection. Both are intended for media that should not enter the transmitter’s pressure port — such as corrosive, viscous or crystallizing process fluids.
These are catalog configurations of the same transmitter platform, so electrical specifications (12-32VDC supply, IP65, long-term stability <0.2%/year, working temperature -30~70℃) follow the shared family parameter table. Send us your medium, flange or thread specification and measuring range for a tailored proposal.
Features
- Diaphragm seal isolates the sensor from the process medium
- Flange-mounted (flange-diaphragm) or threaded (diaphragm-seal) process interface
- Shares the proven explosion-proof transmitter platform and parameter set
- 4~20mADC output; 12-32VDC supply; IP65
- Accuracy ≤±0.25%FS; long-term stability <0.2%/year
Specifications
| Parameter | Value (shared family parameters) |
|---|---|
| Measuring range | -0.1~60MPa |
| Accuracy | ≤±0.25%FS |
| Long-term stability | <0.2%/year |
| Output signal | 4~20mADC |
| Power supply | 12-32VDC |
| Protection rating | IP65 |
| Working temperature | -30~70℃ |
| Process interface | Flange-mounted diaphragm (flange-diaphragm version) or threaded diaphragm seal (diaphragm-seal version) |
Applications
- Corrosive media that must not contact the sensor’s pressure port
- Viscous or easily crystallizing process fluids
- Vessel and pipeline pressure points with flange connections
FAQ
When do I need a diaphragm-seal transmitter instead of a standard one?
When the medium is corrosive, viscous or prone to crystallizing, a diaphragm seal keeps it away from the sensing element while still transferring the process pressure to the transmitter.
What is the difference between the flange-diaphragm and diaphragm-seal versions?
The flange-diaphragm version mounts directly on a process flange; the diaphragm-seal version uses a threaded diaphragm-seal connection. Both share the same transmitter platform and electrical specifications.
How do I specify the right configuration?
Contact us with your medium, range and process connection (flange size or thread); we respond within 24 hours.
