Product Short Description
Product Brief Introduction
The KIS-2 series is a high-precision industrial strain gauge load cell developed by Vishay BLH Nobel, engineered for static weighing, dynamic tension monitoring and precise force measurement under severe industrial environments. The 20kN variant delivers stable linear measurement while offering exceptional resistance to lateral offset loads, thermal expansion displacement and mechanical vibration. It integrates fully sealed stainless steel construction with built-in temperature compensation circuitry, and supports global hazardous area certification for explosive process zones.
Description
Core Technical Specifications & Performance Parameters
- Rated Nominal Capacity: 20 kN (4500 lbf)
- Rated Output Sensitivity: 2.0 mV/V at full load
- Internal Bridge Resistance: 350 Ω input / 350 Ω output, full Wheatstone strain gauge bridge
- Comprehensive Accuracy Class:
- Combined Error: ≤ ±0.03 %FS
- Non-Linearity: ≤ ±0.02 %FS
- Hysteresis: ≤ ±0.02 %FS
- Repeatability: ≤ ±0.01 %FS
- Temperature Drift Performance:
- Zero Drift: ≤ ±0.002 %FS / °C
- Span Drift: ≤ ±0.001 %FS / °C
- Operating Temperature Range: -20 °C to +80 °C
- Storage Temperature Range: -40 °C to +90 °C
- Electrical Connection: Standard 10-meter 4-core shielded signal cable; optional M12 industrial circular connector interface
- Protection Grade: IP67 full environmental sealing, dust-tight and temporary immersion resistant
- Overload Ratings:
- Safe Overload: 150 %FS (20kN × 1.5 = 30kN, no permanent deformation)
- Ultimate Breaking Load: 300 %FS (60kN)
- Dynamic Response Frequency: 5 kHz, supports fast real-time tension fluctuation capture
- Service Fatigue Life: Minimum 1,000,000 full load cycle tests without performance degradation
Material Composition & Structural Features
- Sensing Body Material: Machined high-grade 17-4PH stainless steel, corrosion-resistant to water, weak acid and oil mist
- Mounting Base Accessories: Dual options – yellow chromate coated carbon steel or full stainless steel assembly bracket
- Core Structure: Patented double cantilever shear beam floating load point architecture
- Strain Gauge Layer: High-temperature foil strain gauges bonded with high-stability epoxy resin, fully encapsulated inside sealed housing
- Sealing Structure: Multi-layer polyurethane potting + stainless steel compression cable gland, eliminates moisture and dust ingress
- Mechanical Advantage: Tolerates up to 100 % lateral force relative to vertical rated load, eliminates measurement deviation caused by vessel thermal expansion or conveyor side offset
Working Principle
The module operates on Wheatstone full strain gauge bridge theory. Vertical load force generates uniform elastic shear deformation on the double cantilever beam. Bonded strain gauges convert tiny mechanical deformation resistance changes into proportional analog millivolt electrical signals. Built-in integrated temperature compensation circuit automatically offsets resistance drift from ambient temperature shifts, maintaining consistent output linearity. Shielded cable transmits low-noise analog signals to weighing transmitters, DCS or PLC signal acquisition modules for conversion to digital weight/tension data.
Typical Application Scenarios
- Process Vessel Weighing: Batch mixing tanks, chemical reactors, storage silos, pharmaceutical blending vessels
- Web Tension Control: Paper making lines, textile spinning, plastic film extrusion, metal foil rolling
- Conveyor & Material Handling: Belt scale material flow measurement, overhead crane force monitoring
- Precision Force Testing: Material tensile test benches, packaging compression force detection
- Hazardous Zone Process: Oil & gas refining, chemical explosive production, dust explosion risk food processing (ATEX/IECEx certified versions)
Installation Requirements
- Mounting Surface: Flat, rigid steel base plate with minimum thickness 12mm; eliminate foundation vibration and uneven settlement
- Load Point Alignment: Central vertical load application only; avoid eccentric point contact to prevent lateral torque
- Cable Routing: Maintain 30cm minimum bend radius for signal cable; separate from high-power AC motor cables to avoid electromagnetic interference
- Assembly Preload: Install with factory-supplied floating mounting hardware; do not hard-lock all bolt connections to retain thermal expansion buffer
- Hazardous Area Installation: Use certified intrinsically safe wiring barriers and explosion-proof cable glands for ATEX/IECEx rated units
Operation & Maintenance Precautions
- Prohibit impact, hammer striking or welding near the sensor body; welding current will permanently damage internal strain gauges
- Do not exceed 150 % safe overload rating during normal operation; permanent zero shift occurs above 200 %FS
- Regular inspection of cable gland sealing every 6 months for outdoor/humid environments; replace damaged cable to prevent water intrusion
- Perform full span calibration after equipment relocation, foundation settlement or long-term shutdown exceeding 3 months
- Avoid continuous exposure to strong corrosive chemical vapors without additional protective stainless steel housing
- Ground the shielded cable screen at signal transmitter side single-point only to eliminate ground loop noise
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