PT-201D Oil-Filled Differential Pressure Transmitter (4–20mA / RS485 / HVAC & Liquid Level)
Short Product Summary：
1，The PT-201D Differential Pressure Transmitter is engineered for high-precision, low-drift measurement of differential pressure, fluid flow, and liquid level across demanding environments. Featuring a high-stability oil-filled piezoresistive silicon differential core from leading global suppliers, the PT-201D isolates sensitive electronics from corrosive process media using liquid-filled diaphragm barriers.
2，Integrated with a dedicated signal-conditioning ASIC, the transmitter provides full-scale digital linearity correction and active thermal compensation. Outfitted with a waterproof, breathable Hirschmann connector, it converts differential pressure into standard industrial analog (4–20mA, 0–10VDC) or digital (RS485 Modbus, I2C) signals for real-time monitoring in HVAC, automotive testing, medical, and aerospace process loops.
Key Features & Benefits：
1，Oil-Filled Piezoresistive Differential Core: Incorporates a media-isolated, oil-filled silicon core to handle dynamic differential pressure shocks with superior long-term zero-point stability.
2，Smart ASIC Signal Conditioning & Linearity Correction: Utilizes high-integration sensor signal processing to execute precise digital temperature compensation and multi-point non-linear correction across variable ambient conditions.
3，Breathable Waterproof Hirschmann Connection: Features a custom-molded plug with an integrated breathable waterproof membrane. Fully compatible with standard HTP connectors for broad field-wiring versatility.
4，Flexible Dual-Signal Architecture: Supports 2-wire 4–20mA, 0–10VDC, RS485 (Modbus-RTU), and I2C output options, facilitating easy integration with PLCs, SCADA systems, and IoT edge gateways.
5，Wide Industrial & OEM Adaptability: Compact housing and high EMI/RFI immunity make it a versatile choice for air duct monitoring, filter clogging detection, flow rate sensing, and tank level metering.
Industrial Applications：
1，HVAC & Environmental Control: Air filter pressure drop, cleanroom differential pressure, variable air volume (VAV) systems, and duct monitoring.
2，Fluid Flow & Liquid Level Measurement: Sealed tank liquid level gauging, orifice plate flow metering, and pipeline differential pressure control.
3，Medical & Automotive Testing: Medical gas delivery, automotive test benches, and aerospace component testing.
4，Process Control & Automation: Hydraulic differential monitoring, pneumatic systems, and industrial filter maintenance warning systems.