The Setra Model 264 Differential Pressure Transmitter is a low-air pressure transmitter able to sense differential pressure in both negative and positive ranges. The Model 264 incorporates a tensioned stainless steel diaphragm to form a variable capacitor that will produce variation in the output signal. The Model 264's durable design will tolerate an overpressure of 10 psig (68.95 kPa) and has an unconditional three-year warranty.. Kele is the leading supplier of building automation products. When you need the right product, right now, count on Kele.