Technical Description: Kobold KAH-22004 Air Velocity Transmitter
The Kobold KAH-22004 is a precision-engineered air velocity transmitter designed for accurate ventilation and environmental control. This device utilizes an innovative hot-film anemometer principle, allowing it to provide highly accurate measurements even at extremely low air velocities. It is a critical sensor for HVAC systems, clean room monitoring, and industrial process control where precise airflow regulation is required for safety and efficiency.
High-Accuracy Sensing Technology
The KAH-22004 features a user-selectable sensing range (0-10 m/s, 0-15 m/s, or 0-20 m/s), making it adaptable to a wide array of duct sizes and flow conditions. It provides a standardized analog output (4-20 mA or 0-10 VDC), which ensures seamless integration with modern PLC and BMS controllers. The probe length is adjustable, allowing for perfect centering within the duct to capture the most accurate flow profile.
Key Technical Characteristics
- Part Number: KAH-22004.
- Measuring Principle: Thermal (Hot film).
- Sensing Ranges: 0-2000 / 3000 / 4000 ft/min (Selectable).
- Power Supply: 24V AC/DC ± 20%.
- Analog Output: 4-20 mA or 0-10 V (Switchable).
- Housing: Polycarbonate (IP65 protection).
- Operating Temp: -25°C to +50°C.
- Accuracy: ± 3% of the measured value.
Advanced Reliability and Setup
The KAH-22004 is built for long-term stability. Unlike mechanical anemometers, the hot-film principle has no moving parts to wear out or clog with dust. The unit also features an adjustable damping time, which helps to smooth out signal fluctuations caused by air turbulence within the ducting. Its robust polycarbonate housing protects the sensitive electronics from environmental stressors, ensuring consistent performance in both commercial and industrial HVAC applications.
| Category | Specification |
| Media Humidity | 5…95 % RH (Non-condensing) |
| Cable Entry | M16 x 1.5 |
| Installation | Duct mounting with flange |
Maintenance Insights
To maintain peak accuracy, the sensing probe should be kept free of heavy mineral deposits or grease. Periodic cleaning with a non-abrasive compressed air spray is recommended. During installation, the arrow on the probe must be aligned with the direction of the airflow to ensure the sensor captures the velocity vector correctly.
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