Document Number: 0610440-25-0001 (Rev: D)
Type 4-131
VELOCITY VIBRATION TRANSDUCER
Made in the United States of America
DESCRIPTION
The 4-131 is a seismic mass type velocity transducer designed for measuring vertical vibrations at low frequencies and high
temps up to +700°F (+371°C) or +900°F (+482°C). A seismic mass magnet is suspended by springs and a coil attached to the
case. The output signal results from relative movement between the magnet and coil when the case vibrates. This air damped
system operates above its natural frequency so the output is proportional to velocity.
SPECIFICATIONS
Sensitivity:
@ +77°F (+25°C*), 100 Hz, 1 IPS (25.4 mm/sec) RMS into a 10,000 ohm resistive load
Model No. Sensitivity Connection Method
4-131-0001:
4-131-0103:
4131-0104:
4131-0105:
4-131-0106:
4-131-0109:
4-131-0116:
4-131-0120:
4-131-0123:
4-131-0125:
4-131-0128:
4-131-0141:
4-131-0148:
135 mV/ IPS (5.31 mV/mm/s)
150 mV/ IPS (5.91 mV/mm/s)
145 mV/ IPS (5.71 mV/mm/s)
145 mV/ IPS (5.71 mV/mm/s)
100 mV/ IPS (3.94 mV/mm/s)
135 mV/ IPS (5.31 mV/mm/s)
200 mV/ IPS (7.87 mV/mm/s)
*135 mV/ IPS (5.31 mV/mm/s)
*135 mV/ IPS (5.31 mV/mm/s)
135 mV/ IPS (5.31 mV/mm/s)
*145 mV/ IPS (5.71 mV/mm/s)
150 mV/ IPS (5.91 mV/mm/s)
135 mV/ IPS (5.31 mV/mm/s)
Std. 173960 / 169500-XXXX
Std. 173960 / 169500-XXXX
Int. Cable, 20 ft., prepped leads
Int. Cable, 6 ft., prepped leads
Std. 173960 / 169500-XXXX
Int. Cable, 15 ft., prepped leads
Std. 173960 / 169500-XXXX
Int. Cable, 21 ft., prepped leads
Std. 173960 / 365195-XXXX
Int. Cable, 21 ft., prepped leads
Int. Cable, 21 ft., prepped leads
Int. Cable, 35 ft., prepped leads
Int. Cable, 50 ft., prepped leads
* 900°F (+482°C) version
Frequency Range: 15 – 2000 Hz
Mounting Orientation: Sensitive axis is in longitudinal direction
Amplitude Range: 0.07 inch (1.78 mm) pk-pk maximum
Acceleration Range: 0.02 to 50 g peak
Sensitivity Shift w/ Position: 10% maximum
Temperature Range: -65°F to +700°F optional +900°F (-54°C to +371°C optional +482°C)
Thermal Coefficient of Sensitivity: 0.02%/°F from +77°F (0.04%/°C from +25°C)
Shock: 50 g
Damped Resonant Frequency: 15 Hz nominal
Excitation: Self-generating
Insulation Resistance: 100K ohm minimum
Polarity: Pin 1 is positive when case is moved away from base.
Weight: 5.8 oz (164 g) nominal
Accessories Included: Calibration Record
Optional Accessories: Cable w/connector (P/N 169500-XXXX)
Connector (P/N 173960)
INSTALLATION
Rigidly attach the transducer to the equipment under test using four screws and lock washers. Be sure to tighten the screws
securely. Connect one end of cable assembly to the transducer and the other end to the vibration monitoring device.
CAUTION: Never apply in excess of 45VDC across the terminals.
REPAIR
For further information contact:
Customer Service
CEC Vibration Products
746 Arrow Grand Circle
Covina, CA 91722
Phone: 626-938-0200
Fax: 626-938-0202
