Automatic Fixed ELT
503 Series
Key Features:
- 406 MHz Cospas-Sarsat message, with GPS.
- 121.5 and 243.5 Homing frequencies.
- Automatic G Activation.
- Fixed or rotary wing installations.
- Fixed/portable options.
- Modular construction.
About This Automatic Fixed ELT Series
In the demanding field of aviation safety, the 503 ELT System reigns supreme, meticulously engineered to pinpoint the location of downed aircraft with unwavering accuracy. Its comprehensive frequency coverage, integrated GPS and durable construction make it an unrivalled choice in the emergency locator transmitter market.
Unwavering Detection Across Expansive Frequencies:
The 503 ELT System transmits the conventional 121.5MHz and 243MHz homing frequencies, along with the Cospas-Sarsat 406MHz distress frequency, including GPS coordinates. This ensures authorities are instantly alerted and search and rescue teams have a comprehensive range of signals for a swift and effective rescue operation.
Unparalleled Flexibility for Diverse Deployment Scenarios:
A unique feature of the 503 Series ELT is its unparalleled flexibility allowing engineers to adapt the system to their specific needs and deployment scenarios. The ability to operate both remotely and as a portable Personal Locator Beacon (PLB) provides users with the versatility to meet the diverse requirements of various aircraft types and emergency situations.
Automatic Activation
The multi-axis G sensors housed within the G-Switch module allow for accurate and reliable activation during a crash. In the event of an emergency, the G Switch automatically activates the ELT ensuring that the distress signal is initiated even if the aircraft occupants are incapacitated. Unlike the traditional mechanical G Switches, the electronic accelerometers used by Techtest allow for G levels to be programmed to suit different aircraft types. A recent ELT study by NASA also concluded that the Techtest ELT G Switch was the most reliable on the market.
Manual Activation
Pilot activation via a cockpit control panel.
Transmitter Signal
Frequency Peak Effective:
Radiated Power:
121.5MHz / 243.0MHz / 406.025 MHz
0.1W at 121.5 / 243.0MHz
5.0W at 406.025MHz
Frequency Stability:
2 x 10-9 per min
Transmission Duration:
24Hrs min, 5W PERP at -40˚C
48Hrs min, 0.1W PERP at -40˚C
Repetition Rate:
520ms (±1%) every 50 secs (±5%)
Activation:
Manual The 503 Series of ELT’s can be manually
operated via the cockpit mounted remote
switching panel.
Automatic The ELT can be reliably activated by the
multi-axis G Switch.
Dimensions:
255 x 105 x 45mm
Weight:
1.3kg
Battery Storage Life:
6 years
Approvals:
TSO C91a and C126
CAA WR01029
Cospas-Sarsat Approval No. 97
Compliance:
The 503 series of ELT’s are compliant with the following specifications:
Cospas-Sarsat specification C/ST.001
EUROCAE ED-62 / RTCA DO-204
EUROCAE ED-14C / RTCA DO-160C
CAP 208 Aircraft Radio Equipment Issue 2
January 1991 Volume 1, Part 1
Product Range
Part Number
503-1
Transmitter Only
503-4
Remote Controller
503-7
Multi-axis G Switch Module
503-17
Remote Controller with back lighting
503-19
Multi-axis G Switch Module for helicopter mounting
503-20
Remote Controller with NVG lighting
503-35
Multi-axis G Switch Module with embedded GPS
503-36
Multi-axis G Switch Module with embedded GPS for helicopter mounting
Accessories
Part Number
10-102-19
ELT Rigid Whip Antenna – Aircraft Mounted
10-102-33
ELT Rigid Whip Antenna – Aircraft Mounted
10-118-28
ELT Blade Antenna – Aircraft Mounted
10-118-35
ELT/GPS Blade Antenna – Aircraft Mounted
10-274-1
ELT Flexible Whip Antenna – Transmitter Mounted
A0637
Mounting Tray – Portable Installation
A0637-1
Mounting Tray – Fixed Installation
A0673-1 series
Battery for 503-1 series
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Meticulously engineered to pinpoint the location of downed aircraft with unwavering accuracy.
