Absolute pressure gauge

relativedifferentialwith LCD display

Overview
Precision digital pressure measurement solution for industrial applications. YUNYI Full Series digital pressure gauges are online instruments driven by advanced microcontroller units and high-quality imported pressure sensor cores. They provide high accuracy across multiple classes, corrosion and impact resistance, low temperature drift and excellent long-term stability. Ultra-low-power electronics extend battery life, allowing standard operation without external power. The series addresses limitations of traditional pointer gauges in corrosive, vibrating or otherwise demanding environments.

Variants & Accuracy Classes

• Economy Series – 0.4, 0.5 accuracy → General industrial pressure monitoring
• Standard Precision Series – 0.2 accuracy → Process control, hydraulic systems
• High Precision Series – 0.05, 0.02 accuracy → Calibration, laboratory testing
• Ultra-High Precision Series – 0.01 accuracy → Metrology, R&D, critical measurement

Technical Specifications (Key Parameters)

• Measuring Range: –100 kPa ~ 0 ~ 300 MPa (customizable)
• Accuracy Class: 0.01, 0.02, 0.05, 0.2, 0.4, 0.5
• Pressure Types: Gauge pressure, absolute pressure, differential pressure
• Output Signals: RS485, RS232, 4-20 mA, wireless communication (ACI) – optional
• Display: 5-digit dynamic digital display + analog bargraph indicator
• Overload Pressure: 1.5–3× full scale (depending on range)
• Standby Current: < 10 μA
• Power Supply: 3.6V high-energy lithium battery (2–3 years) or rechargeable battery (up to 5 years)
• Medium Temperature: –25°C ~ 80°C
• Process Connection: M20×1.5 (external thread) (other connections available)
• Material: 316L stainless steel
• Protection Rating: IP65
• Pressure Units Supported: mmH₂O · mmHg · psi · kPa · MPa · Pa · mbar · bar (quick switch)

Available Configurations

• General-Purpose Type – Standard digital display with optional output signals for routine industrial measurement
• Explosion-Proof Type – Ex d IIC T6 Gb / Ex ia IIC T4 Ga certified for petroleum, chemical, coal mining and hazardous locations
• Diaphragm Seal Type – Isolated diaphragm design for corrosive or viscous media; suitable for food, beverage, pharmaceutical and chemical processing
• High Precision Type (0.05/0.02/0.01) – Calibration-grade accuracy for laboratory and verification tasks
• Communication-Enabled Type – RS485/RS232/4-20 mA/wireless outputs for remote monitoring and SCADA integration

Features & Benefits

• High precision and long-term stability thanks to imported sensors and advanced microprocessor design
• Large, clear 5-digit LCD and analog bargraph for easy reading in varied lighting
• Extended battery life with ultra-low-power standby (3.6V lithium or rechargeable options)
• Rugged 316L stainless steel housing for corrosion resistance and mechanical durability
• Flexible output options for integration with control systems and data acquisition
• Quick unit switching among supported pressure units
• Simple installation: standard M20×1.5 connection and no external power required for normal use

Customization Options

• Measuring Range – Custom ranges from vacuum to 300 MPa
• Process Connection – M20×1.5, 1/4" NPT, 1/2" NPT, flange or custom threads
• Output Signal – None (standard), RS485, RS232, 4-20 mA, wireless
• Accuracy Class – 0.01 / 0.02 / 0.05 / 0.2 / 0.4 / 0.5
• Housing Material – 316L stainless steel (special alloys on request)
• Display Type – 5-digit LCD with or without backlight, bargraph integration
• Pressure Type – Gauge / absolute / differential

Product Specifications

• Measuring Range: –100 kPa ~ 0 ~ 300 MPa (customizable)
• Accuracy Class: 0.01, 0.02, 0.05, 0.2, 0.4, 0.5
• Pressure Types: Gauge, absolute, differential
• Outputs: RS485, RS232, 4-20 mA, wireless (optional)
• Display: 5-digit digital + analog bargraph
• Overload: 1.5–3× full scale
• Standby Current: < 10 μA
• Power: 3.6V lithium or rechargeable battery (up to 5 years)
• Process Connection: M20×1.5 (others available)
• Material: 316L stainless steel
• Protection: IP65
• Units: mmH₂O · mmHg · psi · kPa · MPa · Pa · mbar · bar