Anwoll
https://www.anwoll.com/products/dpt51-micro-differential-pressure-transmitter.html
DPT51 differential micro pressure transmitter is the latest release. It has flexibility of multi-rangesensor, high function of single range sensor, and is ideal for industrial appl i cation. Thedifferential pressure transmitter has built in multiple optional pressure range and unitselection, and is easily to adjust through built-in DiP switch. The shell protect is IP65 and equipped with stainless steel conduit for convenient wire arrangement. It is widely used in HVAC, energy management system, VAV and fan control, clean room pressure, smokehood control, oven pressurization, furnace ventilation, furnace ventilation control etc.