Product List

ETL’s & PLB’s

The need to accurately pinpoint downed aircraft through the use of an Emergency Locator Transmitter (ELT) has always existed. The increasing use of both COSPAS/SARSAT and Global Positioning System (GPS) has highlighted the need for an ELT System with expanded range capabilities.

The Techtest 503 ELT system from HR Smith offers just that; full frequency coverage including 121.5MHz, 243MHz and 46.025MHz with optional inclusion of transmission of last known GPS co-ordinates.

Housed within high quality durable thermoplastic, the ELT units are through coloured yellow thermoplastic for high visibility,

Unique features of the 503 Series of ELT are the ability to have full remote extended range operation, incorporating a multi-axis G Switch, together with both fixed or portable ELT function in one unit

Portable operation allows for fast, snap release of the housing, with simple removal of the transmitter unit for use as a man portable Personal Locator Beacon should this be required.

Saywell International are approved by the OEM to programme PLB’s in house.



• Extended frequency coverage
• Full remote operation
• Fixed and rotary wing operation
• Multi-axis G switch for full aircraft compatibility
• Solid state G switch operation eliminates false/rogue operation
• Fixed/portable options
• Easy aircraft removal for man portable Personal locator Beacon use
• Modular construction



• TSO C91a and C126
• CAA WR01029
• COSPAS/SARSAT Approval No. 97

Compliance specifications:


• COSPAS/SARSAT specification C/ST.001
• CAP 208 Aircraft Radio Equipment Issue 2 January 1991 Vol 1, Part 10.