- Superior Stability Avoids Down Time
- NEMA-4/IP65 and NEMA-6/IP68 Rated
- ±0.25% FS High Accuracy
- 3:1 Range Turndown
Setra’s Model 550 low-pressure transducer features 3:1 range turndown for field adjustment from 110% to 32% of the nominal range, making this unit well suited for applications that are subject to overpressure. Changing via the switch and potentiometer conveniently located on the top of the transducer housing.
The Model 550 packaged in a rugged 316 stainless steel housing for use in general purpose and submersible applications. A male or female threaded pressure fitting is offered for general purpose applications, and an open face style with a KF25 flange is provided for submersible applications. The Model 550 circuit is lightning/RFI protected, virtually eliminating costly field replacement.
Principle of Operation:
The capacitive sensor is constructed of an electrically isolated stainless steel electrode, and ceramic diaphragm mounted firmly and in parallel to each other. The diaphragm is capable of slight flexing under applied pressure. A minute change in applied pressure alters the gap between the electrode and diaphragm. A custom-designed ASIC detects this change, amplified and converted to a high-level linear output signal that is proportional to applied pressure.