Welcome to HR Smith

The HR Smith Group of Companies is an independent avionics manufacturing company which has been serving the aircraft industry for over 40 years. The Group consists of four companies and has capabilities in Airborne Antennas, Static Dischargers, Radomes, Emergency Locator Transmitters, Homing Systems and Avionics Test Sets.

All products utilise advanced technology and are manufactured to the highest standards by a dedicated team of professionals at our UK and US factories, offering a wide range of solutions for both commercial and military applications.

The HR Smith Group of Companies has full Quality Certification including BS EN ISO 9001:2008, EN9100:2003, AS9100 Rev B,  EASA Part 21, EASA Part 145 and UKMOD X Listing. In addition many of our products carry specific TSO, ETSO, FAA PMA and OEM approvals.

503-16 COSPAS/SARSAT Approval

Techtest Ltd located in Hereford, United Kingdom, who suppy a wide range of Search and Rescue Equipment for both Civil and Military platforms, 503-16 cospas sarsat approvedhave received Class 1 COSPAS/SARSAT approval for the deployable beacon which forms the integral part of the Crash Position Indicator (CPI) system.

The Beacon approval, under TAC No. 244, covers all variants of the 503-16 deployable beacon including those fitted with integral GPS, and memory module (MM), for integration with a wide range of Crash Data Recorders.

Utilised world wide the Techtest CPI system has become the system of choice for helicopter operators servicing the off shore oil and gas industry.


500-32 personal locator beaconNew Small Personal Locator Beacon

Techtest have introduced a new range of small Personal Locator Beacons. Customers have for many years been calling for smaller PLB's but the specification requirement for 48 hour operation at -20°C has always made battery size critical.

Techtest have optimised the operation of the batteries to overcome this problem and in conjunction with new miniturised electronics, the 500-32 series PLB's finally provides the user with a compact, easy to use unit.

After rigorous testing the 500-32 series of ELT(s) or PLB has recently been awarded a COSPAS SARSAT type approval (Certificate No. 223).


Direction Finding S.A.R.

  • Multi-beacon DF
  • Single compact antenna unit
  • High sensitivity receiver
  • Fully COSPAS-SARSAT compatible

The Techtest DF system is designed to reduce the time to locate emergency locator beacons. It is compatible with both 121.5MHz swept tone distress beacons and 406MHz COSPAS-SARSAT transmissions on current and future frequencies.

The user is able to monitor four frequencies and detect emergency transmissions. Each transmission is allocated a unique identification which can then be selected for more detailed information.

For 121.5MHz the system can display relative bearing details.

For 406MHz the system will give all the same information as 121.5MHz but in addition will record and decode the COSPAS-SARSAT message, giving details of the distress beacon and if available the GPS beacon location.



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