CEC 4-138 Velocity Transducer

The friction-free moving elements in CEC's 4-138 Velocity Transducers assure long life and reliability. Designed for industrial applications on fixed turbines, you can use this instrument in turbine hot sections where high temperatures cause problems with other sensors. Sensors have NEC and IEC hazardous location certificates.

The system is simplified due to the low impedance, high level output that can drive AC meters, recorders, and control electronics without using special amplifiers.

The friction-less design also allows measurement of extremely low vibration levels, critical when monitoring precision balanced turbine systems. The low level is limited only by system noise. The 4-138 is a seismic mass type velocity transducer designed for measuring vertical vibrations at low frequencies and high temperatures up to +700°F (+371°C).

The output signal results from relative movement between the internal coil and magnet when the case vibrates. This magnetic damped system operates above its natural frequency. The self-generated sensor output is proportional to velocity.

Model Number	Output Sensitivity	Frequency Range (Hz)	Temperature Range	Mounting Base	Mating Connector	Integral Cable	Weight	Other Information
4-138-0001	135 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	173960		1 lb	Sug. Cable Assy. 780045 or 780052
4-138-0002	145 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	173960		1 lb	Sug. Cable Assy. 780045 or 780052
4-138-0003	150 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	173960		1 lb	Sug. Cable Assy. 780045 or 780052
4-138-0004	200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	173960		1 lb	Sug. Cable Assy. 780045 or 780052
4-138-1001-005 4-138-1002-005 4-138-1003-005 4-138-1004-005	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	5ft. Shielded	2 lbs
4-138-1001-010 4-138-1002-010 4-138-1003-010 4-138-1004-010	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	10ft. Shielded	3 lbs
4-138-1001-015 4-138-1002-015 4-138-1003-015 4-138-1004-015	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	15ft. Shielded	3 lbs
4-138-1001-017 4-138-1002-017 4-138-1003-017 4-138-1004-017	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	5M Shielded	3 lbs
4-138-1001-020 4-138-1002-020 4-138-1003-020 4-138-1004-020	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	20ft. Shielded	3 lbs
4-138-1001-030 4-138-1002-030 4-138-1003-030 4-138-1004-030	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	30ft. Shielded	4 lbs
4-138-1001-033 4-138-1002-033 4-138-1003-033 4-138-1004-033	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	10M Shielded	4 lbs
4-138-1001-040 4-138-1002-040 4-138-1003-040 4-138-1004-040	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	40ft. Shielded	5 lbs
4-138-1001-050 4-138-1002-050 4-138-1003-050 4-138-1004-050	135 mV/ips 145 mV/ips 150 mV/ips 200 mV/ips	15-2000	-65 to +700°F -54 to +371°C	std. Square	Integral Cable	50ft. Shielded	5 lbs