Train Measurement System TMS-E232

Equipped with an extensive sensor suite, this inertial gyro sensor also has the durability required by the rail industry. The TMS-E232 can measure roll rate, yaw rate, superelevation, and truck hunting.


  • Solid State, Strap Down System
  • Rugged, High Reliability
  • Vibration Resistant
  • Analog Superelevation (Roll Angle) Output
  • RS-232 Serial Data Outputs
  • Proven Operation on Head Truck Assembly
    (Both Diesel and Electric)
  • No Moving Parts
    No lubrication or Service Requirements
  • Two Year Limited Warranty
  • Engineering Support

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Designed specifically with the rail industry in mind, the Train Measurement System (TMS) features an extensive sensor suite inside of an extremely rugged package. With two angular rate sensors and a single axis accelerometer, the TMS is an ideal choice for any application measuring, roll, yaw, superelevation, truck hunting, or track irregularities.

One of the cornerstones of the TMS is its rugged design. The gyros used in this package are isolated from vibration internally, and the sensor inputs are processed by an on-board microprocessor. This allows the TMS to be mounted directly to the truck underneath a rail car or locomotive. The durable enclosure that houses the TMS electronics is designed to allow for mounting in such a demanding environment.

The TMS-E232 is used in the rail industry for track testing and high speed train tilt testing. This sensor is also useful on vehicles when the required mounting location is in an extremely harsh environment.



Range: Bank (Superelevation) ±20°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 2°/V ±10V Output
Accuracy: Static ±0.3°
* Accuracy: Dynamic ±0.5%

Angular Rate

Range: Roll, Yaw ±45°/sec
Resolution: 0.025°/sec Binary mode (14 bit)
Scale Factor Accuracy: ±0.5%
Bias: Roll, Yaw < 0.2°/sec (Analog) ±0.02°/sec  Binary
mode (14 bit)
Non-Linearity: < 0.1% Full scale range
Bandwidth: 11 Hz
Noise: < 0.03°/sec rms


Range: Lateral ±10g
Resolution: 4mg
Scale Factor Accuracy: 2%
Bias: Lateral < 10mg
Non-Linearity: 0.1% Full scale range
Bandwidth: 3 Hz


Temperature: Operating -40°C to 85°C
Temperature: Storage -50°C to 85°C
Vibration: Operating 5g rms 20 Hz to 2 KHz
Vibration: Survival 10g rms 20 Hz to 2 KHz
Shock: Survival 1000g 10mS ½ sine wave


Frame Rate: 71.1 Hz Maximum
Startup Time: Data 5 sec
Startup Time: Fully operational 10 sec
Input Power: 10 to 30VDC 6W
Input Current: 500mA @ 12VDC 250mA @ 24VDC
Input Velocity: ±10VDC Full scale (±400kph)
Digital Output: RS-232
Analog Output: ±10VDC
Analog Output Impedance: 300 Ohm Per line


Size: Including
Mounting Flanges
7.50″W x 8.25″L x 3.20″H 19 x 21 x 8.1 (cm)
Weight: 240oz (15 lb) 6800 grams (6.8 Kg)
Connection: MS-27656T-15B-19P MIL-C-38999 Series 1
* Assumes accurate velocity data.
Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver.
Velocity input is required, see table below.
Specifications are subject to change without notice.
This product may be subject to export restrictions. Please consult the factory.

TMS-E232 Input Velocity Formats

Format Specifications
Analog: ±400 kph; 40 kph / volt
Binary RS-232: ±400 kph; 14 bit
(See product manual for more details)
GPS RS-232: NMEA 183; VTG format
(See product manual for more details)
Pulse Counter: 1000 to 6000 pulses per revolution;
0.5 to 2 meter diameter wheel



Title File Type
TMS-E232 Spec Sheet pdf Download
TMS-E232 Owner’s Manual pdf Download