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The Nobel KIS-2-20KN is a high-precision load cell signal conditioner specifically designed for force and weight measurement applications up to 20 kilonewtons (kN). As part of Nobel’s KIS-2 series of compact industrial weighing amplifiers, the KIS-2-20KN provides accurate, stable, and noise-immune conversion of millivolt-level signals from strain gauge-based load cells into standardized analog (4–20 mA, 0–10 V) or digital (RS-485 Modbus RTU) outputs. Engineered for integration into process control and automation systems, the KIS-2-20KN supports both tension and compression loading configurations, making it suitable for a wide range of industrial weighing tasks—from small hopper scales to test benches and material handling equipment.
Housed in a rugged, space-saving DIN-rail mountable enclosure, the Nobel KIS-2-20KN features advanced signal processing capabilities including automatic zero tracking, programmable digital filtering, and temperature compensation to minimize drift over time and environmental changes. Its 6-wire connection (sense+ and sense–) ensures excitation voltage regulation at the load cell itself, compensating for cable resistance and enabling high accuracy even with long cable runs. Whether used in a food packaging line requiring hygiene compliance or a chemical plant demanding intrinsic safety interfaces, the KIS-2-20KN delivers reliable performance with minimal setup complexity.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | KIS-2-20KN |
| Manufacturer | Nobel (part of Spectris plc) |
| Product Type | Load Cell Signal Conditioner / Weighing Amplifier |
| Measurement Range | Up to 20 kN (configurable via software) |
| Load Cell Compatibility | 4-wire or 6-wire strain gauge (350 Ω typical) |
| Excitation Voltage | 5 VDC ±0.1%, regulated with sense lines |
| Input Sensitivity | 0.5 to 10 mV/V |
| Output Options | 4–20 mA (isolated), 0–10 V, RS-485 (Modbus RTU) |
| Accuracy | ±0.02% of full scale |
| Sampling Rate | Up to 100 Hz (adjustable) |
| Operating Temperature | –10°C to +55°C |
| Power Supply | 24 VDC ±10% (18–30 VDC) |
| Mounting | DIN rail (35 mm) per EN 60715 |
| Protection | Overload protection, reverse polarity, ESD ±4 kV |
| Certifications | CE, RoHS, EMC Directive 2014/30/EU |
Main Features and Advantages
High Accuracy with Advanced Compensation:
The KIS-2-20KN employs precision instrumentation amplifiers and 24-bit A/D conversion to achieve ±0.02% full-scale accuracy. Built-in temperature compensation algorithms counteract thermal drift in both the load cell and internal electronics, ensuring consistent readings across daily and seasonal ambient shifts—critical for batch weighing and quality control.
The KIS-2-20KN employs precision instrumentation amplifiers and 24-bit A/D conversion to achieve ±0.02% full-scale accuracy. Built-in temperature compensation algorithms counteract thermal drift in both the load cell and internal electronics, ensuring consistent readings across daily and seasonal ambient shifts—critical for batch weighing and quality control.
Flexible Output and System Integration:
Unlike basic amplifiers, the KIS-2-20KN offers dual output capability: a current loop (4–20 mA) for legacy PLC analog inputs and an RS-485 port for digital communication via Modbus RTU. This allows simultaneous connection to a local controller and a central SCADA system without additional hardware. Configuration is performed via front-panel buttons or optional PC software, enabling quick setup of tare, span, filter settings, and calibration points.
Unlike basic amplifiers, the KIS-2-20KN offers dual output capability: a current loop (4–20 mA) for legacy PLC analog inputs and an RS-485 port for digital communication via Modbus RTU. This allows simultaneous connection to a local controller and a central SCADA system without additional hardware. Configuration is performed via front-panel buttons or optional PC software, enabling quick setup of tare, span, filter settings, and calibration points.
Robust Industrial Design for Real-World Conditions:
Designed for factory floors, the KIS-2-20KN includes galvanic isolation between power, analog output, and digital ports to prevent ground loops. The 6-wire load cell interface maintains excitation stability over distances up to 100 meters, eliminating errors caused by voltage drop in standard 4-wire setups. Front-panel LEDs indicate power, fault, and active output status, while the sealed terminal blocks resist dust and vibration.
Designed for factory floors, the KIS-2-20KN includes galvanic isolation between power, analog output, and digital ports to prevent ground loops. The 6-wire load cell interface maintains excitation stability over distances up to 100 meters, eliminating errors caused by voltage drop in standard 4-wire setups. Front-panel LEDs indicate power, fault, and active output status, while the sealed terminal blocks resist dust and vibration.
User-Friendly Calibration and Diagnostics:
Zero and span calibration can be performed manually using front keys or remotely via Modbus commands—ideal for sealed or hazardous installations. The KIS-2-20KN also provides diagnostic data such as load cell health (mV/V reading), overload warnings, and excitation faults, reducing troubleshooting time during maintenance.
Zero and span calibration can be performed manually using front keys or remotely via Modbus commands—ideal for sealed or hazardous installations. The KIS-2-20KN also provides diagnostic data such as load cell health (mV/V reading), overload warnings, and excitation faults, reducing troubleshooting time during maintenance.
Application Field
The Nobel KIS-2-20KN is widely used in industries where precise force or weight measurement directly impacts product quality, safety, or regulatory compliance. In food and beverage processing, it powers checkweighers, filling machines, and ingredient batching systems that require rapid, repeatable measurements under washdown conditions—its compact size fits easily into stainless steel control enclosures near conveyors or mixers.
Within chemical and pharmaceutical manufacturing, the KIS-2-20KN enables accurate dosing of raw materials into reactors or blenders. Its stable output and digital filtering reject vibrations from nearby pumps or agitators, ensuring that 20 kN-scale reactions are not compromised by signal noise. When paired with intrinsically safe barriers, it can be deployed in Zone 2 hazardous areas.
In material handling and logistics, the KIS-2-20KN integrates into conveyor belt scales, pallet wrappers, and robotic gripper force monitors. For example, in automated warehouse sortation systems, it verifies package weight in real time to prevent shipping errors. Similarly, in test and validation labs, the KIS-2-20KN serves as the backbone of tensile testers or compression rigs, delivering high-resolution force data to data acquisition systems for R&D or quality assurance.
Related Products
KIS-2-50KN: Higher-capacity variant for loads up to 50 kN – same form factor, extended range
KIS-2 Analog Only: Base model without RS-485 – lower cost for simple 4–20 mA applications
KIS-2 Configurator Software: PC tool for advanced setup, calibration logging, and firmware updates
Nobel PFT Load Cells: Compatible 20 kN shear beam or S-type load cells – optimized for KIS-2-20KN
KIS-2 DIN Rail Power Supply: 24 VDC unit with low ripple – recommended for noise-sensitive installations
KIS-2 Terminal Block Kit: Shielded, screw-clamp connectors – ensures secure 6-wire load cell termination
KIS-2 Analog Only: Base model without RS-485 – lower cost for simple 4–20 mA applications
KIS-2 Configurator Software: PC tool for advanced setup, calibration logging, and firmware updates
Nobel PFT Load Cells: Compatible 20 kN shear beam or S-type load cells – optimized for KIS-2-20KN
KIS-2 DIN Rail Power Supply: 24 VDC unit with low ripple – recommended for noise-sensitive installations
KIS-2 Terminal Block Kit: Shielded, screw-clamp connectors – ensures secure 6-wire load cell termination
Installation and Maintenance
Pre-installation preparation: Mount the KIS-2-20KN on a grounded DIN rail away from high-frequency sources like VFDs or radio transmitters. Use shielded, twisted-pair cable for the load cell connection, grounding the shield at the amplifier end only. Verify that the load cell’s resistance matches specifications (typically 350 Ω) and that mechanical mounting prevents side loads or bending moments. Apply initial calibration with known dead weights after 30 minutes of warm-up time to stabilize internal electronics.
Maintenance recommendations: The KIS-2-20KN requires no routine servicing but should undergo annual recalibration in critical applications. Inspect terminal tightness and cable integrity during scheduled plant shutdowns. If erratic readings occur, use the front display or Modbus register to check raw mV/V values—this helps distinguish between load cell failure and amplifier issues. Keep spare KIS-2-20KN units in dry, static-safe storage to ensure rapid replacement during unplanned downtime.
