Inertial Measurement Units

Allan variance plots of Optolink's fiber-optic gyroscopes

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Compact Inertial Measurement Unit IMU200

IMU200 is the state-of-art and most miniature FOG IMU
with low-noise MEMS accelerometers (3 triads of MEMS utilized and combined)

Gyroscopes
Range of measured angular rate, °/s	±950 (±495 for export)
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.2 ≤0.02 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.3
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤300
Random walk (Allan variance), °/√hour	≤0.02
Bandwidth, Hz	≥100 (up to 1kHz)
Accelerometers
Range of measured acceleration, g	±10g
Bias repeatability, mg	≤1.0
Velocity random walk, µg/√Hz	≤80
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤500
Physical Characteristics
Misalignment, mrad	≤2 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	5 VDC or 27±5 VDC
Power consumption, W	≤7 W
Digital output interface	RS-485
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	75 × 75 × 60 mm
Weight	0.5 kg

Allan variance plot of IMU200 gyroscopes

Allan variance plot of IMU200 accelerometers

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Compact Inertial Measurement Unit IMU400

IMU400 is the state-of-art miniature FOG IMU with low-noise
MEMS accelerometers (3 triads of MEMS utilized and combined)

Gyroscopes
Range of measured angular rate, °/s	±540 (±495 for export)
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.1 ≤0.01 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.3
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤200
Random walk (Allan variance), °/√hour	≤0.01
Bandwidth, Hz	≥100 (up to 1kHz)
Accelerometers
Range of measured acceleration, g	±10g
Bias repeatability, mg	≤1.0
Velocity random walk, µg/√Hz	≤80
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤500
Physical Characteristics
Misalignment, mrad	≤1.5 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	5 VDC
Power consumption, W	≤7 W
Digital output interface	RS-422
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	80 × 95 × 62.5 mm
Weight	0.7 kg

Allan variance plot for gyroscopes of IMU400

Allan variance plot for accelerometers of IMU400

Presentation at 2020 IEEE International Symposium on Inertial Sensors and Systems (INERTIAL): paper, poster and pre-recorded Oral Presentation (wmv, pptx, pdf )

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Inertial Measurement Unit IMU400C

IMU400C is especially constructed for oil/gas pipeline inspection cases, with geometry optimized for small pipeline diameters.

Gyroscopes
Range of measured angular rate, °/s	±400
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.1 ≤0.01 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.3
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤300
Random walk (Allan variance), °/√hour	≤0.01
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometer
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.7
Velocity random walk, µg/√Hz	≤30
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤300
Physical Characteristics
Misalignment, mrad	≤1.5 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	5 VDC
Power consumption, W	≤10 W
Digital output interface	RS-422
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	Ø79 × 145 mm (mounting Ø90)
Weight	0.9 kg

Allan variance plot of IMU400C

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Inertial Measurement Unit IMU500

IMU500 is based on Optolink’s three axis closed loop fiber-optic gyroscope TRS500 and three pendulum accelerometers

Gyroscopes (TRS500)
Range of measured angular rate, °/s	±400
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.1 ≤0.007 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.3
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤200
Random walk (Allan variance), °/√hour	≤0.007
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometers
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.5
Velocity random walk, µg/√Hz	≤20
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤300
Physical Characteristics
Misalignment, mrad	≤1.5 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	5 VDC or 27±5 VDC
Power consumption, W	≤10 W
Digital output interface	RS-485 or RS-422
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	110 × 110 × 90 mm
Weight	1.6 kg

Allan variance plot of gyroscopes in IMU500

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Inertial Measurement Unit IMU501

IMU501 is based on three Optolink’s single axis closed loop fiber-optic gyroscope SRS501 and three pendulum accelerometers.

Gyroscopes (SRS501)
Range of measured angular rate, °/s	±250 (optional ±1000*)
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.03 ≤0.005 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.1
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤200
Random walk (Allan variance), °/√hour	≤0.003
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometers
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.5
Velocity random walk, µg/√Hz	≤20
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤300
Physical Characteristics
Misalignment, mrad	≤1.5 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	27±5 VDC
Digital output interface	RS-422
Power consumption, W	≤20 W
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	155 × 140 × 110 mm
Weight	3 kg

Allan variance plot of gyroscopes in IMU501

*for export the available dynamic range is limited by ±495°/s

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Inertial Measurement Unit IMU1000

IMU1000 is based on three Optolink’s single axis closed loop fiber-optic gyroscope SRS1001 and three pendulum accelerometers.

Gyroscopes (SRS1001)
Range of measured angular rate, °/s	±550
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.005 ≤0.001 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.03
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤100
Random walk (Allan variance), °/√hour	≤0.0007
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometers
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.3
Velocity random walk, µg/√Hz	≤15
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤100
Physical Characteristics
Misalignment, mrad	≤0.3 mrad
Output sample rate	up to 2000 Hz
Power supply, V	27±5 VDC
Power consumption, W	≤20 W
Digital output interface	RS-422
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	171 × 224 × 252 mm
Weight	8.5 kg

Allan variance plot of gyroscopes in IMU1000

The export of IMU1000/IMU1001 is under strict government control due to its precision characteristics. Export license is granted upon the International Import Certificate (End Use Certificate) issued by the authorized Ministry of the end user’s country and the end use certificate issued by the ultimate end user reflecting the detailed intended civil end use of the Goods. Besides that, the end user company undertakes to grant the right to inspect the Goods supplied at any time. Please allow 2-3 months for the process; positive outcome is not guaranteed even in case all the required documents are presented

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Inertial Measurement Unit IMU500T

with extended operation temperature range (-60°С ~ +60°С), waterproof

IMU500T is based on Optolink’s IMU500 unit with additional heating system that ensures successful operation at temperatures down to -60°С

Gyroscopes (TRS500)
Range of measured angular rate, °/s	±400
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.1 ≤0.007 (Allan variance)
Bias drift at changing temperature from -60°C to +60°C (100s-averaging, 1σ), °/hour	≤0.5
Scale factor error in temperature range -60°C to +60°C (1σ), ppm	≤300
Random walk (Allan variance), °/√hour	≤0.01
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometers
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.5
Velocity random walk, µg/√Hz	≤20
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤500
Physical Characteristics
Misalignment, mrad	≤1.5 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	27±5 VDC
Power consumption, W	≤15W normal, ≤80W (heating on)
Digital output interface	RS-422 (RS-485 under request)
Operation temperature	-60°C ~ +60°C
Storage temperature	-60°C ~ +80°C
Dimensions	185 × 143 × 114 mm
Weight	2.6 kg

Allan variance plot of gyroscopes in IMU500T

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Inertial Measurement Unit IMU501D

IMU501D is especially constructed for oil/gas pipeline inspection cases requiring high precision, with geometry optimized for medium to large pipeline diameters. IMU501D is based on three Optolink’s single axis closed loop fiber-optic gyroscope SRS501 and three pendulum accelerometers.

Gyroscopes (SRS501)
Range of measured angular rate, °/s	±250 (optional ±1000*)
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.03 ≤0.005 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.05
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤100
Random walk (Allan variance), °/√hour	≤0.003
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometers
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.3
Velocity random walk, µg/√Hz	≤15
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤150
Physical Characteristics
Misalignment, mrad	≤0.3
Output sample rate	up to 2000 Hz
Power supply, V	27±5 VDC
Power consumption, W	≤20 W
Digital output interface	RS-422
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	Ø142 × 280 mm
Weight	6.4 kg

Allan variance plot of gyroscopes in IMU501D

*for export the available dynamic range is limited by ±495°/s

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Inertial Measurement Unit IMU501C

IMU501C is the version of IMU501 with improved characteristics, due to additional factory selection and specific calibration procedures

Gyroscopes (SRS501)
Range of measured angular rate, °/s	±250 (optional ±1000*)
Bias drift at fixed temperature (100s-averaging, 1σ), °/hour	≤0.03 ≤0.003 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100s-averaging, 1σ), °/hour	≤0.05
Scale factor error in temperature range -40°C to +60°C (1σ), ppm Scale factor stability (1σ, at room temperature), ppm	≤100 ≤50
Random walk (Allan variance), °/√hour	≤0.003
Bandwidth, Hz	≥100 (up to 2kHz)
Accelerometers
Range of measured acceleration, g	±10g to ±40g
Bias repeatability, mg	≤0.5
Velocity random walk, µg/√Hz	≤20
Scale factor error in temperature range -40°C to +60°C (1σ), ppm	≤300
Physical Characteristics
Misalignment, mrad	≤1.5 (≤0.3 mrad under request)
Output sample rate	up to 2000 Hz
Power supply, V	27±5 VDC
Digital output interface	RS-422
Power consumption, W	≤20 W
Operation temperature	-40°C ~ +60°C
Storage temperature	-40°C ~ +80°C
Dimensions	155 × 140 × 110 mm
Weight	3 kg

*for export the available dynamic range is limited by ±495°/s