PRODUCTS
What is a Remote Controlled Long Range Acoustic Hailing Device?
Eltem's unique and innovative technology allows operators to observe the situation on the spot remotely even during day and night and also clear command and highly effective warning broadcasts to be transmitted to long distances (1~3km). It consists of a high powered Long Range Acoustic Hailing Device that is connected to the equipment via Ethernet and controls all functions remotely using dedicated control software, a motor that can be adjusted vertically and horizontally, a daytime camera and a thermal camera (or a laser illuminator).
Remote Controlled Acoustic Hailing Device PROPA-250R
| – Simultaneous Surveillance and Warning Broadcasting |
| – Superior Voice Intelligibility and Highly clear communication up to 1km |
| – High output of 142dB, 1km broadcasting distance (80dB standard) |
| – Network sound source and microphone broadcasting |
| – 360°(left and right) rotation, 180°(up and down) rotation |
| – 32x optical zoom camera |
| – Network control |
| – All-weather use |
| – Thermal camera (option) |
| – Searchlight (option) |
View the Products
PROPA-250R Concept Map of Operating System
PROPA-250R Specifications
| Items | Specifications | |
| Communications Range | ≥1000m (80dB) | |
| Maximum Output | 142dB SPL @1m (Maximum output limit function according to the user requirement) | |
| Directivity | ≤±15° (2kHz, -3dB) | |
| Dimensions | 880× 386× 321mm, 880× 386× 528mm (included search light) | |
| Weight | 49kg, 52kg (included search light) | |
| Tilt | Range | -90° ∼ +90° |
| Speed | 30°/s | |
| Resolution | 0.01° | |
| Pan | Range | 360° (continuous rotation) |
| Speed | 40°/s | |
| Resolution | 0.01° | |
| Camera | 32x Optical Zoom, 1920×1080 pixel, 30 frame/sec | |
| Thermal Camera (Option) | 100mm Optical Zoom, 640×480 pixel, 9 frame/sec | |
| Laser Pointer | Green Laser, 4W | |
| Communication Interface | TCP/IP, Acoustic broadcast, Remote Volume Control, Control Program | |
| Operating Temperature | -33°C ∼ +60°C | |
| Storage Temperature | -40°C ∼ +70°C | |
Main Features of Acoustic Hailing Device
- Since it broadcasts with directivity and high power, it can transmit highly clear sounds to a long distant (1 ~ 3km).
- With maximum output above 142dB, it can get over the noise of the surrounding area and can provide large and clear communication and warning signals to the inside of vehicles, ships or buildings, overcoming the limitation of the existing broadcasting system (P.A. System).
- It is possible to broadcast using a sound source and a microphone.
Sound Pressure Level vs Distance
– 30~50dB
Quiet library, noise in the woods, bedroom
– 50~60dB
General office noise
– 60~70dB
Noise on large ship deck
– 70~90dB
Small ship engine noise (above deck)
– 80~100dB
Noisy construction site, road noise
– 120~130dB
Jet noise (100m)
– 130dB
Above, we started to feel pain
– 160dB
Rocket firing noise
– Theoretically, We can hear sounds at 88dB at 500m, 82dB at 1km, and 68dB at 5km. –
| – 30~50dB | Quiet library, noise in the woods, bedroom |
| – 50~60dB | General office noise |
| – 60~70dB | Noise on large ship deck |
| – 70~90dB | Small ship engine noise (above deck) |
| – 80~100dB | Noisy construction site, road noise |
| – 120~130dB | Jet noise (100m) |
| – 130dB | Above, we started to feel pain |
| – 160dB | Rocket firing noise |
– Theoretically, We can hear sounds at 88dB at 500m, 82dB at 1km, and 68dB at 5km. –
Environmental Certifications
- Random Vibration : MIL-STD 810F, Method 514.4
- Shipboard Vibration : MIL-STD-167-1A
- Shipboard Shock : MIL-STD-910D, Class I
- Shock : MIL-STD-810F
- High Temperature Operation : MIL-STD-810F, Method 501.4
- Low Temperature Operation : MIL-STD-810F, Method 502.4
- Operating Humidity : MIL-STD-810F, Method 507.4
- Salt Fog : MIL-STD-810F, Method 509.4
- Safety Standard : MIL-STD-1474D
- EMC Standard : FCC Part 15 Class A Radiated and Conducted Emissions
- Water and Dust Protection : IP66
32x Optical Zoom Camera
PROPA-250R allows operators in the control room to see the scene vividly and easily.
Web Page
Remote Network Control
and Broadcasting
PROPA-250R enables convenient control and broadcasting remotely.
Thermal Camera
By installing a thermal camera, it is also possible to monitor at night up to 1km.
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Fire Evacuation Broadcast, Public Place Guide and Evacuation Broadcast, Valley Evacuation Broadcast due to heavy rain, and Coastal Accident Prevention & Evacuation Broadcast
Illegal Activity Warning, Beach Announcement, Access Control Broadcast, Crowd Control
Military Training control, Anti-Piracy, Major Facility Intruder Warning, Preserving Wildlife & Protecting Assets
Traffic Control, Prevention of Secondary Accident, Traffic Accidents and Foggy Broadcast, Emergency Evacuation Broadcast
