Technical Specifications:

• Sensor Interface: 1 channel — Digital weight sensor (MotoHARP or SAW type)
• Output Signal: 4–20 mA DC (M1 configuration) + HART 7 protocol
• Communication: FOUNDATION Fieldbus H1 (C3 configuration)
• Accuracy: ±0.02% of Full Scale (FS)
• Zero Drift: Less than ±0.02% FS per °C (temperature compensation applied)
• Span Drift: Less than ±0.02% FS per °C
• A/D Resolution: 24-bit sigma-delta converter
• Sampling Rate: Up to 100 readings per second
• Excitation Voltage: 5 V DC or 10 V DC (auto-detect for digital sensors)
• Power Supply: 24 V DC (bus-powered via Fieldbus or loop-powered)
• Operating Temperature: -10°C to +50°C (+14°F to +122°F)
• Protection Rating: IP67 / NEMA 4X (stainless steel housing)
• Hazardous Area Approvals: ATEX Zone 1/2, Division 1/2 (Class I, II, III)
• SIL Rating: SIL 2 (IEC 61508)
• Dimensions (W × H × D): Approximately 80 mm × 160 mm × 120 mm
• Weight: Approximately 1.2 kg

Functional Features:

• 1 digital sensor channel — supports Yokogawa MotoHARP and SAW weight sensors
• Automatic zero calibration (Z function) — compensates for drift and tare changes automatically
• FOUNDATION Fieldbus H1 communication for integration with DCS/PLC systems
• 4–20 mA + HART output for legacy system compatibility
• Multi-range capability — supports up to 4 preset weighing ranges
• Gross/Net/Tare weighing with automatic tare tracking
• Vibration filtering — user-configurable digital filter
• Diagnostics: sensor health monitoring, overload indication, communication status

Structural Characteristics:

• Stainless steel (SUS316L) housing for corrosion resistance
• DIN rail or wall mounting
• IP67/NEMA 4X sealed enclosure
• M20 cable gland entries

Working Principle:
The MW100-E receives digital data from a MotoHARP or SAW weight sensor via the dedicated digital interface. The sensor uses surface acoustic wave (SAW) or mechanical harmonic resonance technology to measure weight with high precision. The transmitter processes the digital signal using a 24-bit A/D converter, applies temperature compensation and zero calibration (Z function), and outputs a 4–20 mA DC signal proportional to the measured weight. FOUNDATION Fieldbus communication transmits the full weighing data set to the host DCS.

Advantages:

• ±0.02% FS accuracy — among the highest in the industry
• Digital sensor interface eliminates analog signal degradation
• Automatic zero calibration (Z) removes need for manual tare adjustments
• Dual output (FF + 4–20 mA/HART) ensures compatibility with all control systems
• SIL 2 rated for safety-critical weighing applications

Applicable Industries:

• Chemical and Pharmaceutical (batch weighing)
• Food and Beverage (ingredient weighing)
• Mining and Minerals (belt scale, hopper weighing)
• Cement and Building Materials
• Logistics and Bulk Material Handling

Installation Requirements:

• Mount the transmitter near the weight sensor (maximum 50 m cable length for digital sensor)
• Use shielded cable for the digital sensor connection
• Provide a stable 24 V DC power supply (Fieldbus or loop-powered)
• Ensure the mounting surface is vibration-free for accurate readings
• Ground the transmitter to the plant grounding system

Precautions:

• Use only Yokogawa MotoHARP or SAW compatible sensors — third-party digital sensors are not supported
• Do not exceed the maximum sensor excitation voltage of 10 V DC
• Perform periodic zero calibration using the Z function, especially after power interruption
• Do not install in areas with extreme vibration (>0.5g) without vibration dampening