Kahlenberg Industrial Horns are powerful, high decibel signals backed by years of successful performance in coal yards, chemical plants, refineries, open pit mines and industrial facilities throughout the world. All Kahlenberg Brothers alarm products are designed to be operated indoors as well as in the most severe outdoor applications. They are simply constructed and extremely reliable resulting in a very low cost of use as compared to more complicated means of wide area notification. All of these horns are available for use with optional solenoid and manually activated valves as well as industrial timers.

Viewed here is just a sample of the air horn products available from Kahlenberg Brothers. Contact Detection & Measurement Systems for additional information on the full Kahlenberg Brothers product range.

Model K-1 Directional, Single Tone Industrial Air Horn
Effective Outdoor Coverage Up to 3.0 Kilometers

• SPL (Loudness) on Total: 140 ± 1 dBA @ 1 meter, 70 dB @ 3km
  in still air
• Operating Medium: Air, nitrogen, CO2, 1/2” NPT inlet
• Air Consumption: 11 L/Sec [24 SCFM] @ 7 bar [100 PSIG
  • Ideal for outdoor Industrial applications
• Control: Manual, solenoid or combination valve
• Fundamental Frequency: 311 Hz ± 10 Hz•   
• Energy efficient with hermetically sealed stainless steel diaphragm assembly
  • Will operate on a wide range of pressure without tuning and field adjustments for years of trouble-free service
    
  • High strength aluminum casting and stainless steel fasteners
• Operating Temperature: -40ºC to +85ºC [-40ºF to +185ºF]
• Finish: Primed and painted red alkyd enamel
• Degree of Protection: IP 54

Model K-1R1 Bi-Directional, Single Tone Industrial Air Horn
Effective Outdoor Coverage Up to 3.0 Kilometers

• Operating Medium: Air, nitrogen, CO2, 1/2” NPT inlet
• Control: Manual, solenoid or combination valve
• SPL (Loudness) on Total: 140 ± 1 dBA @ 1 meter, 70 dB @ 3 km in still air
• Consumption: 22 L/sec [45 SCFM] @ 7 bar [100 PSIG]
• Audibility: 3 km (bi-directional) on still air
  • Single tone, 311 Hz fundamental frequency
    
  • Energy efficient with hermetically sealed stainless steel diaphragm assembly
    
  • Will operate on a wide range of pressure without tuning and field adjustments for years of trouble-free service
    
  • High strength aluminum casting and stainless steel fasteners
• Operating Temperature: -40ºC to 85ºC [-40ºF to 185ºF]
• Finish: Primed and painted red
• Degree of Protection: IP 54

MODEL K-4-1-EN-H-120 Omni-Directional,
Single Tone Industrial Air Horn
Effective Outdoor Coverage Up to 3.0 Kilometers

• SPL (Loudness) on Total: 140 ± 1 dBA @ 1 meter, 3 km in still air
• Operating Medium: Air, nitrogen, CO2, 3/4” NPT inlet
• Air Consumption: 44 L/Sec [96 SCFM] @ 7 bar [100 PSIG]
• Control: Manual, solenoid or combination valve
• Single tone, 311 Hz fundamental frequency, engineered to produce full harmonic contents up to 12 octave in order to enhance warning effectiveness
• Ideal for high-noise industrial areas
• Pole mounted steel enclosure for central mounting
• Fully enclosed and heated combination valve
• Energy efficient with hermetically sealed stainless steel diaphragm assembly
• Will operate on a wide range of pressure without tuning or adjustment for years of trouble free service
• Constructed of high strength cast aluminum and stainless steel fasteners
• Operating Pressure: 3 – 10 bar [50 – 150 PSI]
• Operating Temperature: -40ºC to +85ºC [-40ºF to +185ºF]
• Finish: Painted red (alkyd enamel)
• Degree of Protection: IP 54

Model K4-12-EN Omni Directional,
Dual Tone Wide Area Warning System
Effective Outdoor Coverage Up to 3.5 Square Kilometers

• SPL (Loudness): 141 ± 1 dBA on total @ 1 meter, 3.5 km in still air
• Operating Medium: Air, nitrogen, CO2 - 1-1/4” NPT Air Inlet
• Control: Manual, and Solenoid Combination valve
• Air Consumption: 91 L/sec [192 SCFM] @ 7 bar [100 PSIG]
• Fundamental Frequency: 311 Hz / 370 Hz ± 20 Hz (Other frequencies available)
• Fully enclosed and heated air horn for corrosion andweather protection.
• Combination valve set up allows for signaling of all 8 horns at once either manually or electrically controlled.
• Solenoid valve comes standard with explosion proof coil and are available in 120VAC, 240VAC/50-60Hz or 12, 24, 48VDC
• Dual Heaters supplied with thermostat preset to turn on at 4ºC[40ºF] and off at 16ºC[60ºF],
• Horns constructed of cast aluminum with stainless steel hardware
• Frame and side panels constructed from mild steel.
• Operating Pressure: 2 – 10 bar [30 – 150 PSI]
• Operating Temperature: -40ºC to +85ºC [-40ºF to +185ºF]
• Finish: Painted red (alkyd enamel)
• Degree of Protection: IP 56

MODEL KM4-135-EN Omni Directional,
Single Tone Wide Area Warning System
EFFECTIVE OUTDOOR COVERAGE RADIUS OF UP TO 7 KILOMETERS

• Fully enclosed and heated air horn for corrosion and weather resistance (available non-heated)
• SPL (Loudness): 149 ± 1 dB total @ 1 meter, 7 km in still air
• Operating Medium: Air, nitrogen
• Control: Manual & solenoid combination valve
• Air Consumption of Each Horn: 271 L/sec [576 SCFM] @ 9 bar [125 PSIG]
• Single tone, 135 Hz (other frequencies available)
• Heaters supplied with thermostat preset to turn on at 4ºC [40ºF] and off at 13ºC [55ºF]
• Solenoid valves come standard with explosion proof coil and are available in 120VAC, 240VAC/50-60Hz or 12, 24, 48VDC
• Designed for arctic freezing conditions
• Constructed of aluminum with steel supporting frame
• Operating Pressure: 3 – 12 bar [50 – 175 PSI] (higher pressures available}
• Operating Temperature: -40ºC to +65ºC [-22ºF to +149ºF]
• Finish: Primed and enamel coated twice
• Degree of Protection: IP 55

Model KM4–135-EN2-RC Remote Warning Station
EFFECTIVE OUTDOOR COVERAGE RADIUS OF UP TO 7 KILOMETERS

• SPL (Loudness): 149 ± 1 dB total @ 1 meter, 7 km in still air
• Operating Medium: Compressed Air or nitrogen
• Control: Manual & solenoid combination valve
• Air Consumption of Each Horn: 271 L/sec [576 SCFM] @ 9 bar [125 PSIG]
• Fully enclosed and heated air horn for corrosion and weather resistance
• Horns are powered by compressed air cylinders
• Remote activation by radio link or hard wire
• Solar powered with deep cycle battery for communication
• Single tone, 135 Hz (other frequencies available)
• Solenoid valves come standard with explosion proof coil
• Designed for extreme conditions from arctic freezing to desert heat
  and wind up to 100km/h
• Constructed of aluminum with steel supporting frame
• Lightning protected
• Audibility: 7 km in still air
• Fundamental Frequency: 135 Hz ± 4% Hz (other frequencies available)
• Operating Pressure: 3 – 12 bar [50 – 175 PSI] (higher pressures available)
• Operating Temperature: -40ºC to +65ºC [-22ºF to +149ºF]
• Finish: Alkyd Enamel (Urethane finish available)
• Degree of Protection: IP 55