Liebherr 693167414 Load Cell 0201 1013590 Force Measuring Axle

LIEBHERR 693167414 Force Measuring Axle Load Cell (Typ 0201 / 1013590)

The Liebherr 693167414 (Model Reference: Typ 0201 / 1013590) is an intrinsically safe, heavy-duty shear-pin load cell engineered specifically for marine, offshore, and heavy-lift crane boom monitoring. Functioning as a calibrated Force Measuring Axle (Kraftmessachse), this unit serves as a critical structural pivot pin within the crane’s luffing gear, hoist sheaves, or equalizer assemblies.

Manufactured by Liebherr-Werk / Ruthi Electronics AG, the sensor integrates an internal potted amplifier (Verstärker) that conditions raw strain gauge bridge signals into an active, interference-free 4–20 mA current loop. Certified under ATEX directive guidelines for hazardous zone operation, it provides dependable load moment indication (LMI) and overload safety in corrosive salt-mist environments.

Technical Specifications

Key Features

1. Integrated Signal Amplification: Embedded active electronics convert micro-strain to a factory-calibrated 4–20 mA proportional analog current, eliminating external transmitter boxes and high-impedance line losses.
2. Dual Structural & Measuring Function: Functions simultaneously as a high-tensile structural load-bearing axle pin and a high-precision shear transducer.
3. Intrinsically Safe ATEX Rating: Certified II 2G EEx ib IIC T4 under certificate BVS 03 ATEX E 241 for deployment in Zone 1 explosive gas atmospheres.
4. High Marine Corrosion Resistance: Built from high-grade, passivated nickel-chromium stainless/alloy forging with hermetically sealed internal strain gauge chambers rated to IP67/IP68 ingress standards.
5. Factory-Calibrated Force Envelope: Calibrated for a nominal rating of 150 kN with an active measurement spectrum spanning up to 200 kN.

Compatibility

• Liebherr Ship & Deck Cranes: CBB series, CBW (Compact Deck Crane), CBG series (Four-Rope Grab Cranes), and RL-series pedestal/revolving deck cranes.
• Offshore & Harbor Cranes: Liebherr BOS series (Board Offshore Crane), RL, MTC, and LPS/LHM series harbor mobile handling equipment.
• Crane Control Architectures: Fully compatible with Liebherr Litronic crane management systems, PAT/Hirschmann/WIKA safety computers, and any industrial PLC supporting intrinsically safe isolated 4–20 mA current loop inputs.

Applications

• Auxiliary & Main Hoist Load Monitoring: Real-time hook load sensing through sheave pin substitution.
• Luffing Jib Safety Interlocks: Luffing wire rope anchor pin force feedback to prevent safe working load (SWL) envelope violations.
• Load Moment Limitation (LMI): Core sensory input to calculate overturn tipping moment against boom angle transducers.
• Marine Cargo Handling: Real-time grab load tracking on four-rope marine bulk material handling cranes.

Frequently Asked Questions

What is the pinout configuration for the Liebherr 693167414 load cell?

The unit uses a standard 4-conductor color code:

• Red (RD): +24 VDC Supply Voltage
• Grey (GY): 4–20 mA Proportional Signal Output
• Black (BK): Ground / Common return (GND)
• Blue (BU): Not Connected (N.C.)

Can the Liebherr 693167414 pin be installed in reverse orientation?

No. Shear-force axles measure force unidirectionally along a calibrated shear plane. Installing the pin backwards reverses the vector relationship relative to the internal wheatstone bridge, resulting in negative zero-offset drifts or non-linear output. Always align the factory alignment notch toward the true direction of line tension.

What should the output current read when the crane hook is unloaded?

Under zero load (tare weight only), the grey wire should read nominally close to 4.00 mA (typically between 4.05 mA and 4.20 mA, depending on the deadweight of the sheave block and hook assembly). A reading of 0.00 mA indicates a broken loop, open wire, or blown galvanic barrier fuse, while a constant 24 mA reading indicates saturation or an internal transducer bridge fault.

Is this load cell interchangeable with unamplified standard shear pins?

No. Standard mV/V passive pins require an external crane amplifier card. The Liebherr 693167414 contains an integrated active internal amplifier (Verstärker) that outputs a conditioned 4–20 mA industrial signal directly. Connecting this unit to a raw mV/V bridge terminal block will damage the unit or register zero reading.