The Setra Model 230 is a wet-to-wet differential pressure transducer built around a single diaphragm sensor design, so the differential reading it gives is not affected by the actual line pressure the way some dual-sensor designs can be. This makes it a solid choice anywhere a true, stable differential reading matters more than absolute pressure.
It uses an all stainless steel capacitive sensor with 17-4 PH stainless steel wetted surfaces, giving a response time of 30 to 50 milliseconds, noticeably quicker than older oil-filled sensor designs. Accuracy is ±0.25% FS at constant temperature, with ±0.20% FS non-linearity and 0.10% FS hysteresis. Output is 0-5VDC (9-30VDC excitation), 0-10VDC (13-30VDC excitation), or 4-20mA 2-wire current loop. The housing is NEMA 4 rated with barrier strip terminal blocks, and it can be fitted with an optional 3-valve or 5-valve brass manifold for easier installation and maintenance. Standard seals are Viton O-rings, with Buna-N optional for hydrocarbon applications.
From our experience, this gets specified for energy management systems, process control, flow measurement of gases and liquids, level measurement in pressurised vessels, and filter differential pressure monitoring. Before we quote this, we would normally check whether unidirectional or bidirectional range is needed, the output signal, and whether a manifold is required. Hope this helps.
