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AS-668-Series
B&K Vibro Compact, Low Frequency Accelerometer
- Compact for installation in virtually any space
- Hermetically sealed
- Rugged (IP66/ IP67) and corrosion resistant design
- Measures very low frequencies down to 0.5 Hz
AS-668-Series
From
$
518.50
Product Overview
- Additional Features 1 Piezoelectric Principle, Compression type
- Applications Assembly Line, Casing Vibration, Compressor Control, Power Generation, Power Plants & Boilers, Pump Control, Shaft Vibrations
- Connector Style Lateral
- Electrical Output 27 V
- Enclosure Material Stainless Steel
- Enclosure Ratings IP66, IP77
- Ground Isolated Case
- Linearity Error < 1 %
- Measuring Range ±60 g
- Mounting M6 x 30 Screw
- Mounting Note ISO 4762 M6x30 or ¼“-28UNFx30
- Mounting Torque 3.5 Nm
- Natural frequency 30 kHz
- Operating Temperature, Max 125 °C
- Operating Temperature, Min -55 °C
- Output Detail Voltage across entire temperature range: 12.4 Vdc to 13.4 Vdc
- Output Resistance 100 Ω
- Overload Capacity 5000 g peak
- Sensitivity Note Cross Sensitivity: 5%
- Sensor Type Compression Type
- Series ID AS-668-Series
- Storage Temperature, Max 70 °C
- Storage Temperature, Min -20 °C
- Supply Current 2 mA to 10 mA
- Weight 175 g
Supported Applications
The AS-668 Series is a compact, low-frequency accelerometer by Brüel & Kjær Vibro (Omega), designed for monitoring rotating machinery. The series supports vibration measurement on turbines, fans, pumps, and generators.
Operating Conditions & Performance
Based on the piezoelectric principle (compression type), the sensor converts mechanical vibration into an electrical signal with a nominal sensitivity of 100 mV/g ±10 % at 80 Hz. The frequency response is specified as 0.5 Hz to 13 kHz (±3 dB) and 1.5 Hz to 10 kHz (±10 %). Amplitude linearity is less than 1 %, with a cross sensitivity of typically 5 %. The measurement range covers up to 60 g Peak, while the overload capacity supports constant sinusoidal vibration up to 500 g and shock loads up to 5.000 g.
The device operates within an ambient temperature range of -55 °C .. +125 °C. Storage in original packaging is rated for -20 °C .. +70 °C. The sensor features a hermetically sealed stainless steel housing (material 1.4404) with a degree of protection acc. EN 60529 of IP66 / IP67.
Electrical Specifications
- Power Supply: Constant current supply, secure against reverse polarity; 2 mA .. 10 mA.
- Bias Voltage: Typically 12.9 VDC (across entire temperature range: 12.4 VDC .. 13.4 VDC).
- Output Resistance: 100 Ω.
- Maximum Output Voltage: 27 V.
Configuration Options
The AS-668 Series is configured with a robust stainless steel housing and an integrated M12 male, 4-pole plug for electrical connection. The sensor includes the following configurable or standard features:
- Mounting: ISO 4762 M6x30 or ¼-28UNFx30 threaded mounting with a recommended torque of 3,5 Nm.
- Cable Options: Available accessories include AC-1403 (double-wired connection cable with straight plug) and AC-1404 (double-wired connection cable with angled plug).
- Housing Isolation: Housing is isolated against sensor electronics.
Key Product Differences
The AS-668 model represents a general-purpose accelerometer within the series. The primary technical distinction lies in its constant current supply architecture and specific M12 male connector configuration, differentiating it from charge-output or voltage-output sensors requiring external conditioning.
PDFs & Manuals
