Setra 269 Low Differential Pressure Transducer Features
- End Point 0.25% Accuracy – Improved Linearity
- Secure Calibration Key for Zero/Span Adjustments
- 2:1 Turndown Ratio Available
- Fire Retardant Case (UL 94 V-0 Approved)
- Enhanced Thermal Performance
SEAT’s Series 269 differential pressure sensor measures differential pressure and gauge pressure (static) pressure and converts this differential pressure into a proportional electrical output. You can choose either a one-way pressure range or a two-way pressure range. The 269 Series offers 4 to 20 mA analog outputs.
Applied to build energy management systems, the performance of these sensors accurately controls building pressurization and air flow.
The 269 Series sensors are available in ranges from 0.1 in.W.C. up to 100 in.W.C. The standard static accuracy is ±0.25% FS at room temperature. The thermal drift after temperature compensation in the temperature range of -7 ° C ~ +60 ° C is ± 0.02% FS / ° C.
The Model 269 features an improved all-stainless steel inert gas protection argon arc welding sensor. A tight stainless steel membrane and a fixed stainless steel electrode insulated from it form a variable capacitor. The forward pressure causes the diaphragm to move toward the fixed electrode, and the capacitance increases. When the pressure is reduced, the diaphragm is away from the electrode and the capacitance is reduced. Capacitance changes are detected and converted to linear DC signals by Setra’s unique electronic circuitry. The tension sensing element allows overpressure of 2 PSI (in any direction) without damage. In addition, the materials constituting the various components of the sensitive component have a good temperature coefficient matching, so that the temperature performance and long-term stability of the product are sufficiently improved.