Inertial Measurement Unit IMU-E604

Discontinued Product


  • Solid State, Strapdown System
  • Six Accelerometer Outputs
  • Rugged, High Reliability
  • Convenient Set-up
  • Vibration Resistant
  • Analog and RS-232 Serial Outputs
  • Two Year Limited Warranty
  • Engineering Support


Discontinued Product

The IMU-E604 is a complete inertial gyro system. It features three angular rate gyros, three accelerometers, and a fluxgate magnetometer all in a compact, durable package. With this sensor suite, the Watson Inertial Measurement Unit has the capabilities of an AHRS and a DMS combined. It has full attitude outputs – bank, elevation, and magnetic heading – along with triaxial leveled accelerometer data. This allows the IMU-E604 to be used in a wide range of applications, almost any in which an AHRS or DMS might be used. This makes the inertial measurement unit a superb general purpose instrumentation package for research and automotive testing facilities.

The IMU-E604 inertial sensor outputs data via an RS-232 serial link. This allows users to easily view data from the unit. It also allows users to easily change operational parameters for the inertial measurement unit, such as the output data channel selection. In addition to the standard attitude outputs, the IMU is capable of providing triaxial rate, acceleration, and magnetometer data to the user. Watson Industries provides free software for magnetic heading calibration that can be used once the IMU is installed.



Range: Bank ±180°
Range: Elevation ±90°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18° /V ±10V Output
Accuracy: Static ±0.25°
* Accuracy: Dynamic ±0.5%


Range: 0° – 360°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18° /V ±10V Output
Accuracy: Static ±1°
* Accuracy: Dynamic ±0.5%

Angular Rate

Range: Roll, Pitch, Yaw ±100° /sec
Resolution: 0.01° /sec Binary mode (14 bit)
Analog Scale Factor: 10° /sec/V ±10V Output
Scale Factor Accuracy: ±0.5%
Bias: Roll, Pitch, Yaw < ±0.02° /sec
Non-Linearity: < 0.03% Full scale range
Bandwidth: 20 Hz


Range: X, Y, Z ±10g
Range: Forward, Lateral, Vertical ±10g
Resolution: 4mg
Analog Scale Factor: 1g/V ±10V Output
Scale Factor Accuracy: 1%
Bias: X, Y, Z < ±10mg
Non-Linearity: < 1% Full scale range
Bandwidth: 20 Hz


Range: X, Y, Z ±1000 mGauss
Resolution: 0.1 mGauss Binary mode (14 bit)
Scale Factor Accuracy: 1%
Bias: X, Y, Z < ±5 mGauss
Non-Linearity: < 0.01% Full scale range
Bandwidth: 10 Hz


Temperature: Operating -30° C to +60° C
Temperature: Storage -55° C to +85° C
Vibration: Operating 5g rms 20 Hz to 2 kHz
Vibration: Survival 10g rms 20 Hz to 2 kHz
Shock: Survival 500g 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 4.8W
Input Current: 400mA @ 12VDC 200mA @ 24VDC
Input Velocity: (Optional) ±10VDC Full scale (±400kph)
Digital Output: RS-232
Analog Output: ±10VDC
Analog Output Impedance: 300 Ohm Per line


Axis Alignment: < 0.1°
Size: Including Mounting Flanges 6.5″W x 6.5″L x 3.00″H 16.5 x 16.5 x 7.6 (cm)
Weight: 53oz (3.3lb) 1500 grams (1.5Kg)
Connection: RS-232 9 pin female “D” subminiature
Connection: Power / Analog Outputs 25 pin male “D” subminiature
* Assumes accurate velocity data.
Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver.
Static heading accuracy is dependent on the magnetic environment. This sensor will meet or exceed this spec within the 48 contiguous United States.
Specifications are subject to change without notice.
This product may be subject to export restrictions. Please consult the factory.



Title File Type
IMU-E604 Spec Sheet pdf Download
IMU-E604 Owner’s Manual pdf Download