Differential pressure transmitter

MEMS4-20 mA0-10 V

Short Description
YUNYI Micro Differential Pressure Transmitter provides precise measurement of air pressure differentials for HVAC systems, cleanrooms and industrial ventilation. Equipped with a high-stability MEMS sensor, clear LCD readout and IP65-rated enclosure, it is suitable for continuous monitoring and control integration in demanding environments.

Key Features

• High-Precision Measurement – Imported high-accuracy MEMS differential pressure sensor; accuracy up to ±0.5%F.S for ±100 Pa range and ±1%F.S for other ranges.
• Clear LCD Display – Local digital readout with backlight option for quick on-site checks and commissioning.
• Multiple Pressure Ranges – Configurable ranges: ±25 Pa, ±50 Pa, ±100 Pa, ±1000 Pa, ±10000 Pa; custom ranges available.
• Flexible Outputs – 4–20 mA (two-wire), 0–10 V (three-wire) and RS-485 with Modbus RTU for BMS/PLC integration.
• Robust Protection – IP65 enclosure with UL94-V0 flame-retardant PC housing for use in dusty or moist environments.
• On-site Calibration – Built-in zero button and adjustable damping for field calibration and tuning.
• Wide Temperature Compensation – Compensated from -10°C to +60°C for stable readings across operational conditions.

Technical Specifications

• Measurement Media: Air and neutral, non-flammable gases
• Pressure Ranges: ±25 Pa, ±50 Pa, ±100 Pa, ±1000 Pa, ±10000 Pa (custom available)
• Accuracy: ±1.0% F.S (standard) / ±0.5% F.S (±100 Pa)
• Overload Pressure: Up to 2× full scale (model dependent)
• Output Signals: 4–20 mA (two-wire) / 0–10 V (three-wire) / RS-485 (Modbus RTU)
• Power Supply: 12–30 VDC / 24 VAC ±20%
• Power Consumption: ≤1.5 W
• Response Time: Adjustable: 0.5 s / 1.0 s / 2 s / 4 s
• Operating Temperature: -20°C to +70°C
• Compensated Temperature: -10°C to +60°C
• Storage Temperature: -40°C to +80°C
• Protection Rating: IP65
• Housing Material: PC industrial plastic (UL94-V0 flame retardant)
• Pressure Port: Metal barbed fitting, φ6.2 mm
• Communication Protocol: Modbus RTU via RS-485
• Certifications: ROHS, CE

Dimensions & Installation
Compact housing designed for wall or duct mounting (optional bracket). Recommended vertical orientation for highest measurement accuracy. Suitable for confined spaces; wiring and tubing access points provided for straightforward installation.

Applications

• HVAC Systems – Duct static pressure monitoring and fan control.
• Cleanrooms & Laboratories – Maintain positive/negative pressure to control contamination.
• Energy Management – Filter differential monitoring and clogging detection.
• VAV & Fan Control – Precise airflow regulation in variable air volume systems.
• Industrial Ventilation – Furnace draft and boiler ventilation control.
• Environmental Control – Pipeline and enclosure pressure monitoring.
• Medical Equipment – Air pressure monitoring in medical devices and analytical instruments.

Why Choose This Product?

• Versatile Integration – Multiple outputs and Modbus RTU for easy connection to BMS and automation systems.
• Low Maintenance – High-stability sensor with minimal drift, reducing recalibration frequency.
• Fast Response – Configurable down to 0.5 s for dynamic control loops.
• Cost-Efficient – Wide range availability and multi-signal outputs reduce inventory complexity.
• Compliance – Conforming to ROHS and CE quality standards.