Siren Audible Alarms
Reviewed by: Jon Lowy, consulting engineer
Description
Siren audible alarms are devices designed to emit loud, attention-grabbing sounds. These alarms are typically used to alert individuals to a specific condition or event that requires immediate attention. The sound produced by siren alarms is often a sweeping tone that alternates between low and high frequencies, making it highly noticeable in various environments.
Working Principle
Siren audible alarms operate by generating sound waves through a mechanism that creates a sweeping sound between low and high frequencies. This is achieved by using a sound oscillator that drives a piezoelectric disc or similar component to produce the desired tone. The sweeping nature of the sound makes siren alarms particularly effective in noisy environments, as they can cut through ambient noise and ensure that the alert is heard. The usefulness of siren alarms lies in their ability to provide a clear and unmistakable signal that demands attention, making them ideal for emergency situations.
Applications
Siren audible alarms are commonly used in environments where loud and clear alerts are necessary. Specific examples include:
- Industrial Settings: Siren alarms are used to warn workers of machinery malfunctions or safety breaches.
- Marine Environments: They serve as alerts for engine heat indicators, oil pressure, and navigation systems, where the harsh conditions require robust and reliable alarm systems .
- Emergency Services: Sirens are integral to police, fire, and ambulance vehicles to alert the public and clear the way during emergencies.
Advantages over other Audible Alarms
Siren alarms have several advantages over other types of audible alarms:
- High Sound Output: Siren alarms can produce very loud sounds, such as the CE-US515BS model, which outputs approximately 108 ±3 dB (A) at 24 inches, making them suitable for noisy environments .
- Attention-Grabbing: The sweeping tone of siren alarms is more likely to capture attention compared to continuous or intermittent tones.
- Versatility: Siren alarms can be used in a variety of settings, from industrial to marine environments, due to their robust design and high sound output.
Limitations
Despite their advantages, siren audible alarms have certain limitations:
- Environmental Sensitivity: In marine environments, the connection design can lead to failures over time, resulting in costly replacements or retrofits .
- Sound Interference: In environments with multiple alarms, the loudness of siren alarms can potentially drown out other important alerts .
Considerations
When selecting and using siren audible alarms, several factors should be considered:
- Initial Costs: The cost of siren alarms can vary based on their design and features. Indicator models, which include electronic circuitry, may have higher initial costs but offer added value .
- Operating Expense: The energy consumption of siren alarms should be evaluated, especially in battery-operated systems.
- Durability: In harsh environments, such as marine settings, the durability of the alarm's components, including the connection design, is crucial to prevent failures .
- Maintenance Costs: Regular maintenance and potential replacements should be factored into the overall cost of ownership, particularly in environments where alarms are exposed to extreme conditions.
from Federal Signal Corporation - Industrial Signaling and Systems
High-powered rotating siren for maximum coverage. Available in low and mid-range frequency. Three distinct warning signals. AC or Solar-powered with battery operation or backup. Weather-resistant coating. Click here for the 2001-130 and Equinox Tones [See More]
- Alarm Type: Siren
from RS Components, Ltd.
ABUS Wired Indoor Siren [See More]
- Alarm Type: Siren
- Agency Approvals: RoHS; RoHS Compliant
from Federal Signal Corporation - Industrial Signaling and Systems
High-powered rotating siren for maximum coverage. 500 Hz, 128 dB(C) output. Three distinct warning signals. AC or Solar powered with battery operation or back-up. Weather-resistant coating. Click here for siren tones [See More]
- Alarm Type: Siren
from RS Components, Ltd.
Sync Powered Siren Alarm [See More]
- Alarm Type: Siren
- Agency Approvals: RoHS; RoHS Compliant
from Federal Signal Corporation - Industrial Signaling and Systems
Omni-directional for 360 ˚ coverage. Three distinct warning signals. Can operate from batteries directly, or using optional AC with battery back-up. Full battery operation or battery back-up option. High efficiency design produces 115 dB(c) @ 100' while making moderate power demands. Optional... [See More]
- Alarm Type: Siren
from RS Components, Ltd.
Window/door alarm,120dB siren 60x40x15mm [See More]
- Alarm Type: Siren
from Federal Signal Corporation - Industrial Signaling and Systems
Multi-voltage design accepts 120 or 240VAC. Produces one of two tones at three SPL (sound pressure levels). Replicates Federal Signal Model A and Model L siren tones. U-bracket or internal surface mount standard. Produces 104 - 115 dBa @ 10' (114 - 125 dBa @ 1m) depending on tone selected. Type 4X,... [See More]
- Alarm Type: Siren
- Supply Voltage: AC
- Sound Level: 115 to 125
- Operating Voltage: 120 to 240
from RS Components, Ltd.
Compact elct personal alarm,130dB siren [See More]
- Alarm Type: Siren
- Operating Voltage: 9
from Federal Signal Corporation - Industrial Signaling and Systems
Available in 120VAC/DC and 240VAC/DC. High-efficiency design requires only moderate power. Small compact design. Powder coating for long life. Use with RC2W-120/240 motor starter. Use with FC controller for ease of operation. Use with FCU/H for remote radio activation. Produces 102 dBc @ 100... [See More]
- Alarm Type: Siren
from RS Components, Ltd.
SMART HOME WiFi siren, white [See More]
- Alarm Type: Siren
- Agency Approvals: RoHS; RoHS Compliant
- Operating Voltage: 3.7
from Federal Signal Corporation - Industrial Signaling and Systems
Available with 120VAC/DC. DC universal motor. Rugged, durable and corrosion resistant. Maintenance-free. Produces 103 dBa @ 10' (113 dBa @ 1m). Type 3R enclosure. UL and cUL. Features. Model A is a general-purpose electro-mechanical siren that produces a distinctive sound and tonal quality for... [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 113
- Operating Voltage: 120
from RS Components, Ltd.
Signalling Column SIREN Element [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 95 to 105
- Operating Voltage: 24
from Federal Signal Corporation - Industrial Signaling and Systems
Range of up to 200 feet. Coded or sustained tones. Available in – 120 and 240VAC/DC. Produces 112 dBa @ 10' (122 dBa @ 1m). Type 3R enclosure. Wall or surface mount via the integral swivel bracket. Features. Model L is a general-purpose electro-mechanical siren that produces a distinctive... [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 122
- Operating Voltage: 120
from RS Components, Ltd.
ECO70 Multi-Tone Siren 8 Tones 24V [See More]
- Alarm Type: Siren; Buzzer
- Supply Voltage: AC; DC or Battery
- Sound Level: 100
- Operating Voltage: 24
from Federal Signal Corporation - Industrial Signaling and Systems
Compact self-contained siren/speaker. Small size with rugged NEMA4X construction. Secure communications using Commander 128/256 bit encryption. Integrated UHF or VHF 2-way radio – requires an external antenna. Locally or remotely activated. Supervised using Commander 2-way. Outputs to drive... [See More]
- Alarm Type: Siren
from RS Components, Ltd.
Motor Drivern Siren 115db Grey 240VAC [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 114
- Operating Voltage: 240
from Federal Signal Corporation - Industrial Signaling and Systems
Compact self-contained C1D2 siren/speaker. Small size with rugged NEMA4x construction. Secure communications using Commander 128/256 bit encryption. Integrated UHF or VHF 2-way radio requires an external mount. Locally or remotely activated. Supervised using Commander 2-way. Outputs to drive... [See More]
- Alarm Type: Siren
from RS Components, Ltd.
Motor Drivern Siren 115db Grey 24VDC [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 114
- Operating Voltage: 24
from Federal Signal Corporation - Industrial Signaling and Systems
Multi-voltage design accepts 24VDC and 120/240VAC. Produces three tones –wail, yelp and horn. Produces 107-111 dBa @ 10' (117-121 dBa @ 1m). Omni-directional swivel mount. Indoor/outdoor use. Type 3R enclosure (with model WB back box). UL and cUL Listed. Features. SST3-MV is an electronic... [See More]
- Alarm Type: Siren
- Operating Voltage: 24 to 240
- Supply Voltage: AC; DC or Battery
- Mounting: Omni-Directional Swivel Mount
from RS Components, Ltd.
Motor Drivern Siren 109db Grey 240VAC/DC [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 114
- Operating Voltage: 240
from Federal Signal Corporation - Industrial Signaling and Systems
Multi-voltage design accepts 24VDC and 120/240VAC. Produces three tones –wail, yelp and horn. Produces 110.5 dBa @ 10' (120.5 dBa @ 1m). Type 4X, IP66 enclosure. IP69K compliant. External mounting tabs. Indoor/outdoor use. UL/cUL. Features. Model SST3-MV-SB is an electronic siren capable of... [See More]
- Alarm Type: Siren
- Operating Voltage: 24 to 240
- Supply Voltage: AC; DC or Battery
- Mounting: Surface
from RS Components, Ltd.
Motor Drivern Siren 109db Grey 24VAC/DC [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 114
- Operating Voltage: 24
from Federal Signal Corporation - Industrial Signaling and Systems
Multi-voltage design accepts 24VDC or 120/240VAC. Produces three tones – wail, yelp, and horn. Produces up to 110.5 dBa at 10' (120.5 dBa at 1M). Type 4X, IP66 enclosure. IP69K compliant. External mounting tabs. Indoor/outdoor use. UL and cUL for Class I, Division 2, Groups A, B, C and D;... [See More]
- Alarm Type: Siren
- Operating Voltage: 24 to 240
- Supply Voltage: AC; DC or Battery
- Mounting: Surface
from RS Components, Ltd.
Motor Drivern Siren 96db Grey 240VAC [See More]
- Alarm Type: Siren
- Supply Voltage: AC
- Sound Level: 93
- Operating Voltage: 240
from Federal Signal Corporation - Industrial Signaling and Systems
Multi-voltage design – accepts 24VDC, 120VAC or 240VAC. Produces three user-activated tones – wail, yelp, and horn (click here for tones). Produces 101-108 dBa @ 10' (111-118 dBa @ 1m). Cast copper-free aluminum housing spun aluminum projector. Indoor/outdoor use. Type 4X, IP66... [See More]
- Alarm Type: Siren
- Operating Voltage: 24 to 240
- Supply Voltage: AC; DC or Battery
- Mounting: Surface
from RS Components, Ltd.
Motor Drivern Siren 96db Grey 24VDC [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 96
- Operating Voltage: 24
from RS Components, Ltd.
Motor Drivern Siren 96db Grey 24VDC [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 96
- Operating Voltage: 24
from RS Components, Ltd.
Single Tone Siren 110VAC 114dB at 1 Mete [See More]
- Alarm Type: Siren
- Supply Voltage: AC
- Sound Level: 114
- Operating Voltage: 110
from RS Components, Ltd.
Electr. Siren WM alternating 12VDC BK [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 105
- Operating Voltage: 12
from RS Components, Ltd.
Electr. Siren WM alternating 24VDC BK [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 105
- Operating Voltage: 24
from RS Components, Ltd.
Siren Grey + HT JR 120/240V Deep Base [See More]
- Alarm Type: Siren
- Agency Approvals: RoHS; RoHS Compliant
from RS Components, Ltd.
Siren/red [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 98
- Operating Voltage: 28
from RS Components, Ltd.
Motor driven vertical mount siren,230Vac [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 125
- Operating Voltage: 230
from RS Components, Ltd.
High o/p flange mount siren,116dB 240Vac [See More]
- Alarm Type: Siren
- Supply Voltage: AC
- Sound Level: 120
- Operating Voltage: 230
from RS Components, Ltd.
High o/p flange mount siren,127dB 230Vac [See More]
- Alarm Type: Siren
- Supply Voltage: AC; DC or Battery
- Sound Level: 127
- Operating Voltage: 230
from RS Components, Ltd.
White universal squashni siren,12/24Vdc [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 93
- Operating Voltage: 10 to 28
from RS Components, Ltd.
Red universal squashni siren,12/24Vdc [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 93
- Operating Voltage: 10 to 28
from RS Components, Ltd.
high acoustic piezo electric siren,110dB [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 105
- Operating Voltage: 6 to 16
from Mallory Sonalert Products, Inc.
Series: 22mm Industrial Alarms with LED Lights Mounting Method: 22 mm- Panel Mount Circuitry: Yes Sound Type: Fast Siren Freq (Hz): 3900.0 Volt Rating: 9 to 16 DC Typical Loudness (dBa): 85 to 95 @ 2 ft Max Current (mA): 40 mA LED Color: Red CUL Approved: Yes Size: 22 x 43.5 mm Weight: 28 g... [See More]
- Alarm Type: Siren
- Sound Level: 85 to 95
- Specialty Applications: Industrial
- Frequency: 3900
from SFCable.com
15W Indoor/Outdoor Armored Siren w/Blue Strobe [See More]
- Alarm Type: Siren; Bell
- Specialty Applications: Security
from Challenge Electronics
The CE-SX515AQ siren_alarms Alarm from Challenge Electronics delivers 90 (103 Max.) SPL with a 10 nominal current (45 max.). Resonant Freq. is 2900 ( ± 4Hz). ’A ’-style Housing. Termination is Two 0.25 Quick Disconnect Blades. [See More]
- Alarm Type: Siren
- Frequency: 1900 to 2300
- Sound Level: 100
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 116
- Operating Voltage: 6 to 14
from Code 3, Inc.
When the best names in Police, Fire, & Emergency manufacturing spec your products, everyone wins. Our relationships with industry-leading original equipment manufacturers (OEMs) have stood the test of time, time and time again as standards have changed and buyer expectations have risen. Without... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Specialty Applications: Safety; Vehicle
- Mounting: Vehicle
from R. STAHL, Inc.
Omnidirectional high output sounder 110 dB (A) / 1 m. 2 stage alarm, independently selectable 2nd stage. IP66 rated as standard. Aluminium enclosure with stainless steel fasteners. 32 selectable tones meeting international regulations. Sound selection via DIL switch. Lens guard and mounting bracket... [See More]
- Alarm Type: Siren
- Sound Level: 110
- Specialty Applications: Safety
- Supply Voltage: AC; DC or Battery
from Mallory Sonalert Products, Inc.
Series: 22mm Industrial Alarms with Terminal Block Mounting Method: 22 mm- Panel Mount Circuitry: Yes Sound Type: Fast Siren Freq (Hz): 3900.0 Volt Rating: 6 to 16 DC Typical Loudness (dBa): 85 to 95 @ 2 ft Max Current (mA): 40 mA LED Color: CUL Approved: Yes Size: 22 x 43.5 mm Weight: 28 g... [See More]
- Alarm Type: Siren
- Sound Level: 85 to 95
- Specialty Applications: Industrial
- Frequency: 3900
from SFCable.com
30W Siren White [See More]
- Alarm Type: Siren; Bell
- Specialty Applications: Security
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 104
- Operating Voltage: 6 to 15
from R. STAHL, Inc.
Omnidirectional high output sounder 110 dB (A) / 1 m. 5 Joule xenon strobe. 2 stage alarm, independently selectable 2nd stage. IP66 rated as standard. Aluminium enclosure with stainless steel fasteners. Flash rate 1 per second. 32 selectable tones meeting international regulations. Sound selection... [See More]
- Alarm Type: Siren
- Sound Level: 110
- Specialty Applications: Safety
- Supply Voltage: AC; DC or Battery
from Mallory Sonalert Products, Inc.
Series: 22mm Industrial Alarms with Terminal Block Mounting Method: 22 mm- Panel Mount Circuitry: Yes Sound Type: Fast Siren Freq (Hz): 3900.0 Volt Rating: 16 to 28 AC/DC Typical Loudness (dBa): 85 to 95 @ 2 ft Max Current (mA): 40 mA LED Color: CUL Approved: Yes Size: 22 x 43.5 mm Weight: 28 g... [See More]
- Alarm Type: Siren
- Sound Level: 85 to 95
- Specialty Applications: Industrial
- Frequency: 3900
from SFCable.com
Wireless Doorbell. Wireless Design.Range Approximately 80 meters.Preset Tunes.Easy to Install.Button of Sender Waterproof. [See More]
- Alarm Type: Siren; Bell
- Specialty Applications: Security
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 116
- Operating Voltage: 6 to 15
from R. STAHL, Inc.
Max sound output 100 dB (A) / 1 m. IP66, NEMA 4X rated as standard. Single stage alarm. 32 sound tones available meeting international regulations. Low profile (28 mm) light weight aluminium enclosure. 3 metre (118 â €) 2 core pre wired cable fitted and prepared ready for installation. [See More]
- Alarm Type: Siren
- Sound Level: 100
- Specialty Applications: Safety
- Frequency: 440 to 3100
from Mallory Sonalert Products, Inc.
Series: 30mm Alarms with Screw Terminals Mounting Method: Panel- Screw Terminals Circuitry: Yes Sound Type: Fast Siren Freq (hZ): 1900-2900 Volt Rating: 10 to 48 DC Typical Loudness (dBa): 93 to 93 @ 2 ft Max Current (mA): 80 mA @ 48 VDC CUL: Yes Size: 1.69 x 1.9 in Weight: 59 g Operating... [See More]
- Alarm Type: Siren
- Frequency: 1900
- Sound Level: 93
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 97
- Operating Voltage: 6 to 15
from R. STAHL, Inc.
Max sound output 115 dB (A) / 1 m. 2 stage alarm, independently selectable 2nd stage. IP66 rated as standard. 32 selectable tones meeting international regulations. Light weight glass reinforced polyester (GRP) Ex enclosure. Sound selection via 5 way DIL switch. Adjustable stainless steel ratchet... [See More]
- Alarm Type: Siren
- Sound Level: 115
- Specialty Applications: Safety
- Supply Voltage: AC; DC or Battery
from Mallory Sonalert Products, Inc.
Series: 30mm Alarms with Screw Terminals Mounting Method: Panel- Screw Terminals Circuitry: Yes Sound Type: Fast Siren Freq (hZ): 2900.0 Volt Rating: 16 to 28 DC Typical Loudness (dBa): 85 to 95 @ 2 ft Max Current (mA): 40 mA CUL: Yes Size: 1.69 x 1.41 in Weight: 45 g Operating Temperature: '-30... [See More]
- Alarm Type: Siren
- Frequency: 2900
- Sound Level: 85 to 95
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 115
- Operating Voltage: 6 to 14
from R. STAHL, Inc.
32 different signal sequences adjustable with internal DIP switches. Three different signal sequences can be selected through an external switch with a given DIP switch setting. Three PFEER signals. "General alarm". "Toxic gas alarm". "Prepare to abandon platform". Volume control max. 117 dB(A). [See More]
- Alarm Type: Siren
- Sound Level: 117
- Specialty Applications: Safety
- Frequency: 420 to 2900
from Mallory Sonalert Products, Inc.
Series: 30mm Alarms with Terminal Block Mounting Method: Panel- Block Circuitry: Yes Sound Type: Fast Siren Freq (Hz): 2900.0 Volt Rating: 6 to 16 DC Typical Loudness (dBa): 85 to 95 @ 2 ft Max Current (mA): 40 mA CUL Approved: Yes Size: 1.69 x 1.41 in Weight: 45 g Operating Temperature: '-30 ¬... [See More]
- Alarm Type: Siren
- Frequency: 2900
- Sound Level: 85 to 95
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Siren & Alarm manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Siren & Alarm products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
from R. STAHL, Inc.
Max sound output 100 dB (A) / 1 m. IP55 rated as standard. 32 selectable tones meeting international regulations. Sound selection via DIL switch. Stainless steel fixings. Monitoring facility. Flame retardant ABS enclosure. Yodalex range. Audible signal designed for use in hazardous environments. [See More]
- Alarm Type: Siren
- Sound Level: 100
- Specialty Applications: Safety
- Supply Voltage: DC or Battery
from Mallory Sonalert Products, Inc.
Series: Extra Loud Bracket Mount Alarms Mounting Method: Bracket- Bare Wires Circuitry: Yes Tech Type: Piezo Sound Type: Fast Siren Freq (Hz): 1.5K-4K Volt Rating: 5 to 15 DC Typical Loudness (dBa): 105 to 105 @ 1 m Max Current (mA): 200 mA @ 12 Vdc LED Color: CUL Approved: No Size: 40 x 45 x 58 mm... [See More]
- Alarm Type: Siren
- Frequency: 1500
- Sound Level: 105
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
from R. STAHL, Inc.
Max sound output 100 dB (A) / 1 m. IP55 rated as standard. 32 selectable tones meeting international regulations. Sound selection via DIL switch. Stainless steel fixings. Monitoring facility. Flame retardant ABS enclosure. Yodalex range. Audible signal designed for use in hazardous environments. [See More]
- Alarm Type: Siren
- Sound Level: 100
- Specialty Applications: Safety
- Supply Voltage: DC or Battery
from Mallory Sonalert Products, Inc.
Series: Extra Loud Bracket Mount Alarms Mounting Method: Bracket- Bare Wires Circuitry: Yes Tech Type: Piezo Sound Type: Fast Siren Freq (Hz): 1.5K-3.5K Volt Rating: 5 to 15 DC Typical Loudness (dBa): 105 to 105 @ 1 m Max Current (mA): 250 mA @ 12 Vdc LED Color: CUL Approved: No Size: 55 x 53 mm... [See More]
- Alarm Type: Siren
- Frequency: 1500
- Sound Level: 105
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 108
- Operating Voltage: 6 to 14
from R. STAHL, Inc.
Max sound output 105 dB (A) / 1 m. IP56 rated as standard. 32 selectable tones meeting international regulations. Sound selection via DIL switch. Stainless steel fixings. Monitoring facility. Flame retardant ABS enclosure. Yodalex range. Audible signal designed for use in hazardous environments. [See More]
- Alarm Type: Siren
- Sound Level: 105
- Specialty Applications: Safety
- Supply Voltage: DC or Battery
from Mallory Sonalert Products, Inc.
Series: Extra Loud Bracket Mount Alarms Mounting Method: Bracket- Bare Wires Circuitry: Yes Tech Type: Piezo Sound Type: Fast Siren Freq (Hz): 2.5K-4.5K Volt Rating: 5 to 15 DC Typical Loudness (dBa): 105 to 105 @ 1 m Max Current (mA): 150 mA @ 12 Vdc LED Color: CUL Approved: No Size: 39 x 47 x 23... [See More]
- Alarm Type: Siren
- Frequency: 2500
- Sound Level: 105
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
from R. STAHL, Inc.
Max sound output 100 dB (A) / 1 m. 8 LED array flashing beacon. 32 selectable tones meeting international regulations. Sound selection via DIL switch. Stainless steel fixings. Monitoring facility. Flame retardant ABS enclosure. Yodalex range. Combination audible and visual signal designed for use in... [See More]
- Alarm Type: Siren
- Sound Level: 100
- Specialty Applications: Safety
- Supply Voltage: DC or Battery
from Mallory Sonalert Products, Inc.
Series: Extra Loud Bracket Mount Alarms Mounting Method: Bracket- Bare Wires Circuitry: Yes Tech Type: Piezo Sound Type: Fast Siren Freq (Hz): 1.2K-1.9K Volt Rating: 5 to 15 DC Typical Loudness (dBa): 105 to 105 @ 1 m Max Current (mA): 150 mA @ 12 Vdc LED Color: CUL Approved: No Size: 51 x 35 mm... [See More]
- Alarm Type: Siren
- Frequency: 1200
- Sound Level: 105
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 112
- Operating Voltage: 6 to 14
from R. STAHL, Inc.
Max sound output 105 dB (A) / 1 m. 8 LED array flashing beacon. 32 selectable tones meeting international regulations. Sound selection via DIL switch. Stainless steel fixings. Monitoring facility. Flame retardant ABS enclosure. Yodalex range. Combination audible and visual signal designed for use in... [See More]
- Alarm Type: Siren
- Sound Level: 105
- Specialty Applications: Safety
- Supply Voltage: DC or Battery
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 105
- Operating Voltage: 6 to 15
from R. STAHL, Inc.
Nowadays, each vessel from 12 metres and more (length over all) must be equipped with sound signal appliances which are type approved according to the IMO regulations. Hence, one part of the responsibility is the manufacturer's, but still one important part is the shipowner's regarding the choice of... [See More]
- Alarm Type: AirHorn; Siren
- Sound Level: 143
- Specialty Applications: Safety; Marine
- Frequency: 70 to 200
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 117
- Operating Voltage: 6 to 14
from R. STAHL, Inc.
The signalling whistle TYFON type MLT 75/345 with Compressor CK 30 and Push –button Switch TL 80 or TL 85 for vessels up to 20m in length overall is especially made to meet the IMO requirements. The principle items are: • Electrically driven, 12 alternatively 24 V battery voltage. [See More]
- Alarm Type: Siren
- Sound Level: 120
- Specialty Applications: Safety; Marine
- Frequency: 250 to 700
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 107
- Operating Voltage: 6 to 14
from R. STAHL, Inc.
A high-power whistle according to IMO for vessels up to 200 m in length. [See More]
- Alarm Type: Siren
- Sound Level: 130
- Specialty Applications: Safety; Marine
- Frequency: 250 to 700
from Ningbo Best Group Co., Ltd.
Electronic Siren manufacturers, Ningbo FBELE Electronics Co.,Ltd. Our Electronic Siren products are popular all over the world with high quality, competitive price, fast delivery and efficient service. [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 110
- Operating Voltage: 6 to 14
from R. STAHL, Inc.
A high-power whistle according to IMO for vessels of 75 to 200 m in length. [See More]
- Alarm Type: Siren
- Sound Level: 138
- Specialty Applications: Safety; Marine
- Frequency: 130 to 150
from Ningbo Best Group Co., Ltd.
102*114mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 116
- Operating Voltage: 6 to 14
from Ningbo Best Group Co., Ltd.
104.5*76mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 104
- Operating Voltage: 6 to 15
from Ningbo Best Group Co., Ltd.
110*55mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 104
- Operating Voltage: 6 to 15
from Ningbo Best Group Co., Ltd.
133*150mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 116
- Operating Voltage: 6 to 15
from Ningbo Best Group Co., Ltd.
162*41mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 97
- Operating Voltage: 6 to 15
from Ningbo Best Group Co., Ltd.
102*201*235mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 115
- Operating Voltage: 6 to 14
from Ningbo Best Group Co., Ltd.
56*74.5mm,110 or 117dB. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 110 to 117
- Operating Voltage: 9 to 15
from Ningbo Best Group Co., Ltd.
56*78mm,105dB. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 105
- Operating Voltage: 6 to 15
from Ningbo Best Group Co., Ltd.
58*72mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line is... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 110
- Operating Voltage: 6 to 14
from Ningbo Best Group Co., Ltd.
58.5*67mm. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our products line... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 100
- Operating Voltage: 6 to 15
from Ningbo Best Group Co., Ltd.
60*83mm,105dB or 120dB. Established in 1997, Best Group (FBELE), is Chinese leading manufacturer and trader in electronic components. We can offer high quality products in very competitive price for electronics components, as well as best service, in time delivery, small order acceptable, etc. Our... [See More]
- Alarm Type: Siren
- Supply Voltage: DC or Battery
- Sound Level: 105 to 112
- Operating Voltage: 6 to 15