Product Categories

Technical Specifications

Product Categories

Technical Specifications

Density Measurement

High-precision digital density meters for real-time monitoring and process control in industrial environments.

LONN-ND50 Integrated Online Viscosity Meter | LONNMETER

The LONN-ND50 is an inline industrial viscometer that measures liquid viscosity using a metal tuning fork vibration principle. Designed for inline installation in chemical, pharmaceutical, food, and petroleum refining processes, it delivers real-time 4–20mA and RS485 Modbus RTU outputs with Ex d II BT6 explosion-proof certification. Field-configurable via built-in meter menu.

  • Viscosity Range: 0–10,000 mPa·s (calibratable to custom range)
  • Viscosity Accuracy: ±2.5%
  • Temperature Range (Media): 0–60°C
  • Temperature Range (Ambient): -40–85°C
  • Output Signal: 4–20mA active + RS485 Modbus RTU
  • Signal Mode: 4-wire system
  • Explosion Protection: Ex d II BT6
  • Working Pressure : <1 MPa
  • Power Supply: 24VDC

Inline Viscometer — LONN ND80 Vibrating Fork Viscometer-high-temp

LONN ND80 inline viscometer with vibrating fork technology for continuous viscosity measurement. ±1% FS accuracy, dual 4-20mA + RS485, Ex certified, ANSI flange, 316L/Hastelloy.

  • Measurement Principle: Vibrating fork (tuning fork)
  • Viscosity Range: 0 – 5,000 cP (segment calibratable)
  • Viscosity Accuracy: ±1% FS
  • Temperature Range: -10°C to +200°C (standard) / up to +400°C (high-temp)
  • Output: Dual 4-20mA (viscosity + temperature) + RS485 Modbus
  • Power Supply: 24V DC
  • Process Connection: ANSI 150LB RF Flange
  • Wetted Materials: 316L SS / Hastelloy C

Online Viscometer — LONN-DN60 Integrated Viscosity Meter

LONN-DN60 online viscometer with integrated sensor and transmitter. 0-5,000,000 cP range, Ex d IIC T6, 4-20mA + RS485. Wide temperature 0-300C. Built-in display.

  • Measurement Principle: Tuning fork vibration
  • Viscosity Range: 0 – 5,000,000 cP (segment calibratable)
  • Viscosity Accuracy: ±3.0% of reading
  • Explosion Protection: Ex d IIC T6 (flameproof)
  • Output: 4-20mA + RS485 Modbus RTU
  • Power Supply: 24V DC
  • Medium Temperature: 0°C to +300°C
  • Protection Class: IP67 / IP68 (probe)

Split Type Viscometer — LONN-DN100 Online Viscometer

LONN-DN100 split type viscometer for online viscosity measurement in hazardous areas. Ex d IIC T6 flameproof, 4-20mA + RS485 Modbus. Also measures density.

  • Measurement Principle: Tuning fork vibration
  • Viscosity Range: 0 – 10,000 mPa·s (calibratable segment)
  • Viscosity Accuracy: ±2.5% of reading
  • Explosion Protection: Ex d IIC T6 (flameproof)
  • Output: 4-20mA active + RS485 Modbus RTU
  • Power Supply: 24V DC

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