Product Overview: Kobold KAL-43-40 S Flow Monitor
The Kobold KAL-43-40 S is a high-precision electronic flow switch designed for the continuous monitoring of liquid media in demanding industrial processes. Utilizing the calorimetric (thermal) principle, the KAL-43-40 S offers a solid-state solution with no moving parts. This eliminates the mechanical wear and clogging issues associated with traditional paddle switches, making it the ideal choice for cooling circuits in welding systems, induction furnaces, and high-performance machine tool spindles.
Technical Design and Sensing Logic
The KAL-43-40 S operates by measuring the heat dissipation from a heated sensor tip to the surrounding flowing medium. The electronics within the head compare the temperature of the heated tip to the ambient temperature of the liquid. As flow increases, the cooling effect on the tip becomes greater, which is then processed to trigger a switching output. This specific «S» variant features a robust 304 Stainless Steel (1.4301) probe and a G 1/2 A process connection, ensuring high chemical compatibility and pressure resistance.
Key Technical Characteristics
- Part Number: KAL-43-40 S.
- Principle: Calorimetric (Thermal).
- Probe Material: Stainless steel 1.4301 (304).
- Connection: G 1/2 A (1/2 inch male thread).
- Max Pressure: 100 bar.
- Temperature Range: -20°C to +80°C.
- Output: PNP/NPN switching or relay options.
- Display: Integrated LED bar graph for visual flow status.
Advanced Integration and Safety
One of the primary advantages of the KAL series is its integrated visual feedback. The sensor head includes an 8-point LED bar graph that displays the current flow rate relative to the setpoint. This allows maintenance teams to verify system health at a glance. The electronics are fully encapsulated, providing IP65 protection against vibration and moisture. Its fast response time (2 to 12 seconds depending on setup) ensures that machinery is protected from overheating immediately upon flow failure.
| Feature | Detail |
| Switching Range | 0.04 to 2.0 m/s (Water) |
| Accuracy | ± 10% of setpoint |
| Supply Voltage | 24 VDC / 110 VAC / 230 VAC |
Maintenance and Calibration
Because there are no moving parts, the KAL-43-40 S is virtually maintenance-free. It is recommended to check the sensor tip periodically for mineral scale in water-based systems. Calibration is easily achieved via on-site potentiometers, allowing for precise adjustment to the specific flow requirements of the cooling line.
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