Vibration Transducer 4-118

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Vibration Transducer 4-118

Product catalog summary

Applications

Vibration Analysis and Monitoring
Dynamic Balancing Equipment
Engineering Test and Research
Production and Quality Testing

Features

Miniature design for space-limited applications
Self-generated, high-level, low impedance output
Operates up to +500°F (+260°C)
Lightweight at 2.2 ounces

Description

CEC's miniature 4-118 Vibration Transducers are designed for environments where space is limited and heavier transducers would affect results. They are suitable for high-temperature applications and have low sensitivity to transverse accelerations. The transducers can be mounted in any plane and provide a high-level output that can drive AC meters and recorders without special amplifiers. This makes them ideal for use in jet engines, turbines, high-speed motors, superchargers, internal combustion engines, and test cells.

The transducers use a seismic mass coil suspended by springs, moving on gold and sapphire bearings, with a high flux magnet attached to the base. The output signal is generated by the relative movement between the magnet and coil when the case is in motion. The system is magnetically damped and operates above its natural frequency, making the output proportional to velocity. The gold-on-sapphire bearings ensure nearly friction-free movement, enhancing instrument life and reliability. Two configurations are available: 4-118-0001 with an integral cable and 4-118-0002 with a top connector for a detachable cable.

Performance Specifications

Sensitivity: 105 ±5 mV/in/sec at +77°F (+25°C) at 250 Hz
Dynamic Range: Frequency 50 Hz to 500 Hz, Amplitude 0.2 inch peak-to-peak, Acceleration 1 g to 50 g
Frequency Response: ±10% of reference within the dynamic range
Linearity: ±5% of the 10 g’s output within the dynamic range
Transverse Response: 2% maximum
Temperature Range: -65°F to +300°F continuous, up to +500°F intermittent
Thermal Coefficient of Sensitivity: ±0.10%/°F
Damped Resonant Frequency: 30 Hz nominal
Excitation: Self-generating
Coil Resistance: 800 Ω ±15% at 77°F
Insulation Resistance: 100 megaohm minimum
Maximum Static Acceleration: 8 g’s in sensitive axis
Polarity: Positive output when case moves upward
Shock: 100 g’s peak without damage
Electrical Connection: -0001 with integral cable, -0002 with top connector
Weight: -0001: 2.2 oz. maximum, -0002: 1.5 oz. maximum

Ordering Information

Specify 4-118-0001 or 4-118-0002 when ordering. Mating connectors and cable assemblies must be ordered separately. Specifications may change without notice due to product improvements.

Optional Accessories

4-118-0002: 3-foot cable and mating connector, Part No. 82406-0036

Catalog excerpts

4-118 Applications • Vibration Analysis and Monitoring • Dynamic Balancing Equipment • Engineering Test and Research • Production and Quality Testing Features • Miniature, for space limited applications • Self-generated, high level, low impedance output • Operates to +500°F (+260°C) • Weighs only 2.2 ounces Description CEC’s miniature 4-118 Vibration Transducers are especially valuable where space is limited, and where heavier transducers would invalidate your results. These transducers can be used in high temperatures, have low sensitivity to transverse accelerations, and can be mounted in any plane. The measurement system is simplified because the low impedence, high level output can drive AC meters and recorders without using special amplifiers. These features make them suitable for many applications on jet engines, turbines, high speed motors, superchargers, internal combustion engines and in test cells. CEC’s 4-118 Vibration Transducers use a seismic mass coil, suspended by springs, high flux magnet is attached to the base. The output signal results from relative movement between the magnet and coil when the case is in motion. This magnetically damped system operates above its natural frequency so the output is proportional to velocity. The gold-onsapphire bearings provide nearly friction-free movement, extending the instrument life and reliability. These instruments are available in two configurations: the 4-118-0001 with an integral cable, and the 4-118-0002 with a top connector for a detachable cable. moving on bearings of gold and sapphire. A CEC Vibration Products • 746 Arrow Grand Circle • Covina, California 91722 • USA (626) 938-0200 • (800) 468-1345 • Fax: (626) 938-0202 www.cecvp.com ISO 9001:2000 AS9100 Certified Velocity Sensors Vibration Transducer

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4-118 Vibration Transducer Performance Specifications Sensitivity: 105 ±5 mV/in/sec referenced at +77°F (+25°C) at 250 Hz, 0.5 in/sec RMS in the vertical position, into a 10,000 Ω resistive load Dynamic Range Frequency: 50 Hz to 500 Hz Amplitude: 0.2 inch peak-to-peak, maximum Acceleration: 1 g to 50 g (vertical position) Frequency Response: ±10% of reference within the dynamic range Linearity: ±5% of the 10 g’s output within the dynamic range Transverse Response: 2% maximum Temperature Range: -65°F to +300°F continuous, to +500°F intermittent (100 hours max) Thermal Coefficient of Sensitivity:...

Open the catalog to page 2

Vibration Transducer 4-118

Vibration Transducer 4-118

Catalog excerpts

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