Electromagnetic level transmitter YD-322A

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Short description
The YUNYI YD-322A Series diaphragm level transmitter measures liquid level in open vessels, tanks and reservoirs. It integrates a diffusion silicon sensor with precision electronics and undergoes laser trimming, temperature compensation, linear correction, signal amplification, V/I conversion and overload current limiting to provide stable, repeatable readings in industrial environments.

Key Features

• Overload and interference protection – Protection against overpressure, overcurrent, reverse polarity, lightning and electromagnetic interference; proven in long-term stability tests.
• Submersible design – Diaphragm sensor suitable for direct immersion in liquids; applicable to petroleum, chemical, mining, power generation, water management, pharmaceutical, food processing and textile industries.
• Flexible outputs – Standard 4-20mA analog; optional 1-5V or HART protocol; local LED or LCD display available.
• Selectable accuracy – Accuracy classes: 0.1%FS, 0.2%FS or 0.5%FS.
• Cost-efficient design – Engineered to deliver required performance with configurable options.

Technical Highlights

• Measurement range: 0–200 meters (user-selectable)
• Output signal: Analog 4-20mA / 1-5V; Smart 4-20mA with HART protocol
• Power supply: 24V DC (standard); options 12–36V DC, 18.5–45V DC or 220V AC, 50Hz
• Accuracy: 0.1%FS / 0.2%FS / 0.5%FS (selectable)
• Process connection: Thread, clamp, flange or diaphragm type (custom thread sizes and diaphragm materials available)
• Explosion protection: Standard, ExdIIBT4 (flameproof) or ExiaIICT6 (intrinsically safe)
• Electrical connection: Direct lead wire, explosion-proof gland or terminal block (custom options available)
• Overload pressure: 1.7× maximum measurement range

Why Choose This Transmitter

• Stable measurements – High-sensitivity components and temperature compensation reduce drift and improve accuracy.
• Industrial-ready – Compact, impact-resistant and corrosion-resistant construction for harsh sites.
• Easy installation – Multiple mounting and connection options for flexible installation.
• Simple operation – User-oriented interface and straightforward configuration.
• Interference immunity – Designed to maintain accurate readings in electrically noisy environments.

Typical Applications

• Open tank liquid level measurement
• Reservoir and dam water level monitoring
• Chemical storage tank level control
• Pharmaceutical and food processing vessels
• Mining slurry level measurement
• Power plant water treatment systems
• Industrial automation and process control
• Gas and liquid pressure measurement in various industrial settings

Customization Options

• Display type: LED, LCD or 0–100% linear pointer
• Output signal: 4-20mA, 1-5V or HART protocol
• Process connection: Thread, clamp, flange or diaphragm with custom thread sizes and materials
• Electrical connection: Direct lead, explosion-proof gland or terminal block
• Explosion protection: Standard, flameproof or intrinsically safe options

Technical specifications

• Brand: YUNYI
• Model / Series: YD-322A series
• Measurement range: 0–200 m (user-selectable)
• Output: 4-20mA (standard), 1-5V (optional), HART (optional)
• Power supply options: 24V DC (standard); 12–36V DC; 18.5–45V DC; 220V AC, 50Hz
• Accuracy: 0.1%FS / 0.2%FS / 0.5%FS
• Process connection: Thread / Clamp / Flange / Diaphragm (customizable)
• Explosion protection: Standard / ExdIIBT4 / ExiaIICT6
• Electrical connection: Direct lead wire / Explosion-proof connection / Terminal block
• Overload pressure: 1.7× maximum measurement range