Structural Data Recording Set 
The SDRS, AN/ASH-37, is SEI's premier product line.  The micro-processor controlled system is capable of simultaneously recording 20 channels of data.

Structural Health Monitoring System
The SHMS is the airborne portion of SEI’s Health and Usage Monitoring System (HUMS)consisting of a DAPU, DSU, and an optional CDU.

Crash Survivable Recorder-Memory Unit
SEI's CSRMU, RO-647/ASH-40, incorporates the most modern digital speech compression and flash memory technologies available in a Cockpit Voice Recorder (CVR).

Quick Access Recorder

Cumulative Fatigue Recorder
The CFRis an advanced, low cost data recorder capable of monitoring airspeed, altitude, and accelerations. It is capable of recording multiple differential analog signals, digital signals, and global positioning as an option. The CFR’s low power consumption, light weight, and small size allow for easy aircraft installation.

Data Entry Keypad
The DEK, KY-941/ASH-37, provides for manual entry of relevant flight/mission data (fuel, payload, weapons stores, etc.) into the SDRS system memory to preclude the need to correlate this data later.

Signal Data Converter
SEI produces many SDC configurations to accommodate unique aircraft requirements.   The SDC expands the 20 available channels of the SDRS and is capable of data bus monitoring (ARINC-429/629, MIL-STD-1553, etc.)

Airframe Cumulative Fatigue Monitoring System
The ACFMS is an advanced, low-cost 16 channel recorder designed for commercial aircraft and fleet applications.

ACFMS with Global Positioning System Interface
SEI's ACFMS is available with real-time GPS data recording capability.   Position information is sent to the Cumulative Fatigue Recorder via RS-232 and stored in non-volatile memory.

Miniature High Performance Accelerometers
SEI introduces the first in a new line of high performance accelerometers.   The Model UM-1 (pictured at left) is a stable, low cost, force balance accelerometer.

Strain Gage Signal Conditioner
Strain gage signal conditioner amplifies and filters strain gage and strain sensor signals.