Wideband Current Monitors & Clamps

Whether you are interested in observing and measuring submilliamp currents in a charged particle beam or thousands of amps resulting from a fault in a major power feeder, you will find a wideband Pearson current monitor or clamp to suit your needs.

The use of our patented distributed termination technique permits pulse-current monitoring of rise times as short as two nanoseconds. Our current sensor devices of larger inner diameter make possible high voltage current measurement without the risk of voltage breakdown.

Several of our current transformer models feature double shielding for greater noise immunity and increased safety in high voltage applications. All models are sealed and are suitable for use in high voltage insulating oil or under vacuum.

They can be connected to oscilloscopes, spectrum analyzers, power analyzers, digital voltmeters, analog-to-digital convertors, and a variety of other measuring instruments.

Model	Shape	Output V/A	Hole ID in.	Time Domain Parameters				Frequency Domain Parameters
Model	Shape	Output V/A	Hole ID in.	Max. Peak Curr. amps	Droop %/ms	Rise Time nsec.	IT Max. (amp-s)	Max. RMS Curr. (amp)	3dB pt. Low (Hz)	3dB pt.High (MHz)	I/f (peak amps /Hz)
2877	F	1.0	0.25	100	200	2	0.0004**	2.5	300	200	0.0025
4100	E	1.0	0.5	500	90	10	0.002**	5	140	35	0.006
2100	D	1.0	2.0	500	80	20	0.005**	7.5	125	20	0.017
6585	K	1.0	2.0	500	300	1.5	0.002**	10	400	250	0.008
6656	J	1.0	3.5	500	140	3.5	0.01**	10	200	120	0.04
3100*	C	1.0	3.5	500	40	50	0.03**	12	40	7	0.1
150	D	0.5	2.0	1k	20	20	0.02**	15	40	20	0.07
6595	K	0.5	2.0	1k	100	2.5	0.008**	20	100	200	0.03
325*	C	0.25	3.5	2k	100	30	0.09	60	160	10	0.6
2878	F	0.1	0.25	400	20	5	0.004**	10	30	70	0.025
410	E	0.1	0.5	5k	60	20	0.25	50	120	20	1.7
411	E	0.1	0.5	5k	0.9	20	0.2**	50	1	20	0.6
3972	I	0.1	1.0	5k	1	20	0.2	50	1	20	0.6
110	D	0.1	2.0	5k	0.8	20	0.5**	65	1	20	1.5
110Aǂ	D	0.1	2.0	10k	0.8	20	0.5**	65	1	20	1.5
6600	K	0.1	2.0	2k	15	5	0.04**	40	25	120	0.12
310*	C	0.1	3.5	5k	20	40	0.6	140	40	10	3.6
1010*	A	0.1	10.75	5k	250	50	0.7**	120	400	7	4.4
1025	D	0.025	2.0	20k	100	100	0.5	100	160	4	3.0
3025*	C	0.025	3.5	20k	4	100	3.0	325	7	4	20.0
2879	F	0.01	0.25	2k	2	20	0.04**	25	3	20	0.25
5046	E	0.01	0.5	25k	0.3	20	0.5**	100	0.5	20	3.0
101	D	0.01	2.0	50k	0.1	100	2.5**	200	0.25	4	12.0
4997	D	0.01	2.0	20k	0.3	25	1.0**	150	0.5	15	3.5
301X*	C	0.01	3.5	50k	3	200	22.0	400	5	2	140.0
1080*ǂ	C	0.005	3.5	200k	2.0	250	25	750	3.0	1.5	150
1330*	C	0.005	3.5	100k	1.0	250	65	1400	0.9	1.5	400
4418	D	0.001	2.0	200k	0.05	200	6.0**	400	0.7	2	40
1423*	C	0.001	3.5	500k	0.7	500	75	2500	1.0	1.2	450
2093*	B	0.001	4.75	500k	0.09	2000	1200	2500	0.15	0.2	7500

Accuracy +1%, -0% of initial pulse amplitude for all models, with a high impedance load such as 1 megohm in parallel with 20 pF. A 50 ohm termination will reduce the output to half.

      *    are double shielded and are recommended for high voltage or high noise environments. The entries labeled
     **   may need a small dc bias current through the secondary for maximum current-time rating.
     ǂ    Type N Connector

Pearson Clamp On Current Monitors

Accuracy ±1% or better, initial pulse response for all models, with a high impedance load such as 1 mΩ in parallel with 20 pF.

A 50 Ohm termination will reduce the output to half. All models listed below come with a BNC connector except as noted and are to be used with a 50 Ohm coaxial cable.

The current monitor case is conductive and not insulated. Adequate insulation must be provided on the conductor being monitored.

To avoid electrical shock, do not mount or remove the current monitor from a live conductor.

Model	Shape	Output V/A	Hole Id. (in.)	Time Domain Parameters				Frequency Domain Parameters
Model	Shape	Output V/A	Hole Id. (in.)	Peak Curr. (Amps)	Droop (%/�s)	Useable Rise Time (nsec.)	IT Max. (Amp-sec.)	Max. RMS Curr. (Amps)	3dB pt. Low (Hz)	3dB pt. High (MHz)	I/f (RMS Amps /Hz)	I²t max (A�s)
8585C	N	1.0	0.5	500	1.0	2	0.003	5	1.5k	200	0.01	5
4100C	N	1.0	0.5	500	1.0	15	0.0015	5	1.5k	25	0.008	150
8590C	M	1.0	1.0	500	0.7	2.5	0.002	5	1k	150	0.01	25
7790	M	1.0	1.0	500	1.0	15	0.002	5	1.5k	25	0.01	150
4688	L	1.0	2.0	500	0.4	12	0.005	15	600	30	0.03	150
8705Cǂ	-	1.0	2.0	15	4.0	1	.0006	4	1.5k	400	.002	.02
7805	K	1.0	4.0	500	0.7	25	0.004	15	1k	25	0.02	150
7760	J	1.0	6.0	500	0.5	50	0.005	20	750	7.0	0.03	350
5101	L	0.5	2.0	1k	0.1	20	0.02	25	150	18	0.08	700
5949ǂ	K	0.5	4.0	1k	0.1	30	0.02	30	150	12	0.08	700
411C	N	0.1	0.5	5k	0.015	20	0.15	50	25	20	0.7	18k
7795	M	0.1	1.0	5k	0.015	25	0.15	60	25	15	0.8	18k
3525	L	0.1	2.0	5k	0.004	25	0.5	100	6.0	15	2.5	18k
7810	K	0.1	4.0	5k	0.007	50	0.4	150	10	7.0	2.0	18k
7655	J	0.1	6.0	5k	0.007	100	0.4	175	10	4.0	2.0	35k
5008C	N	0.01	0.5	50k	0.005	150	1.0	150	7.5	3.0	4.2	250k
7800	M	0.01	1.0	50k	0.003	175	0.8	125	5.0	2.0	4.0	140k
4160	L	0.01	2.0	50k	0.001	200	2.5	300	1.5	2.0	15.0	1M
7815	K	0.01	4.0	50k	0.001	200	3.0	400	1.5	2.0	15.0	2M
7450	J	0.01	6.0	50k	0.001	250	3.0	400	1.5	1.5	12	2M
5664	L	0.001	2.0	200k	.00025	250	8.0	500	0.4	1.5	50	1M

Accuracy ±1%, initial pulse response for all models unless otherwise stated, with a high impedance load such as 1 megOhm in parallel with 20 pF. A 50Ω termination will reduce the output to half.

Droop: For a flat top current pulse, the output voltage decays toward zero. Initially, the decay appears linear and the slope is referred to as the droop rate.

Usable Rise Time: If the 10% to 90% rise time is greater than the specified usable rise time, initial overshoot will be less than 10% of the pulse amplitude.

ǂ = Type N Connector

Pearson Custom Current Monitors

Accuracy ±1% or better, initial pulse response for all models, with a high impedance load such as 1 megOhm in parallel with 20 pF.

A 50 Ohm termination will reduce the output to half. All models listed below come with a BNC connector except as noted and are to be used with a 50 Ohm coaxial cable.

The current monitor case is conductive and not insulated. Adequate insulation must be provided on the conductor being monitored.

To avoid electrical shock, do not mount or remove the wideband current monitor from a live conductor.

STANDARD MODELS

Model	Output (Volts/ Amp)	Hole Id. (inches)	Time Domain Parameters				Frequency Domain Parameters
Model	Output (Volts/ Amp)	Hole Id. (inches)	Peak Curr. (Amps)	Droop (%/ms)	Rise Time (nsec.)	IT Max. (Amp-s)	Max. RMS Curr. (Amps)	3dB pt. Low (Hz)	3dB pt. High (MHz)	I/f (peak Amps /Hz)
5753	10	2.0	50	700	150	0.0005	4	1,000	3	0.004
5834	10	2.0	50	300	350	0.001	4	500	1	0.006
8600	10	2.0	10	35k	3	0.00005	1	45k	125	.00007
2854	1	5.0	500	40	15	0.04	5	30	20	3.5
7737	1	10.75	500	500	40	0.006	35	750	9	0.003
8181	1	1.0	500	80	15	0.002	5	125	20	0.014
8122	1	2.0	500	4	400	0.1	40	6	1	0.6
6027	1	Coaxial	100	200	2	0.0004	2.5	300	200	.0025
8440	1	3.5	500	3	350	0.25	75	4	1	1.5
804	0.1	2.0	5k	50	20	0.5	75	30	20	3.5
804R	0.1	2.0	5k	12	20	0.6	75	20	20	3.5
8611	0.1	4.0	5k	1.5	40	0.5	140	2	10	3
3363	0.1	5.0	5k	90	40	1	150	120	10	7.5
3382	0.1	15.0	1k	50	80	1.5	250	100	4	10
4285	0.1	10.75	5k	1.5	50	0.4	300	2	7	5.7
5011	0.1	0.25	400	20	5	0.004	10	30	70	0.025
5673	0.1	2.0	5k	100	9	0.15	100	150	40	1.1
8365	0.1	0.25	400	7	20	0.004	10	10	20	0.025
8606	0.05	10.75	10k	0.5	75	3	600	1	5	21.2
2811A	0.02	0.5	1k	1	500	6	150	1.5	0.7	40
8535	0.01	1.0	25k	0.3	25	0.6	120	0.5	15	4
4191	0.01	4.0	50k	4	60	5	400	6	7	35
4994	0.01	2.0	50k	3	100	4.5	200	5	4	25
5803	0.01	10.75	50k	4	200	12	1,000	7	2	80
5624	0.01	2.0	20k	9	25	2	150	12	20	12
7427A	0.01	2.0	4k	2	5	0.2	100	5	70	1.2
5008	0.01	0.5	50k	6	150	2	150	10	3	12
8573	0.01	3.5	50k	0.02	200	30	750	0.03	2	225
6247A	0.005	4.0	100k	2	350	20	1,500	3	1	120
4427	0.001	3.5	500k	0.1	300	480	2,800	1	1.2	3,060
5623	0.001	2.0	200k	1	200	15	400	1.5	2	90
3880	0.001	12 x 2	100k	0.3	500	150	1,200	0.5	0.7	1,000
2445	0.001	14.5	500k	1.5	300	40	3,000	3	2	250
4906	0.001	10.75	500k	1	400	50	2,000	2	1.5	300
7561	0.0005	4.75	1,000k	0.2	2,000	750	3,500	0.15	0.2	3,500

CURRENT CLAMPS

Model	Output (Volts/ Amp)	Hole Id. (inches)	Time Domain Parameters				Frequency Domain Parameters
Model	Output (Volts/ Amp)	Hole Id. (inches)	Peak Curr. (Amps)	Droop (%/ms)	Rise Time (nsec.)	IT Max. (Amp-s)	Max. RMS Curr. (Amps)	3dB pt. Low (Hz)	3dB pt. High (MHz)	I/f (peak Amps /Hz)
8240	2	2.0	500	n/a	12	n/a	n/a	100k	30	n/a
8546	1	2.0	500	10	600	0.15	50	15	0.5	1.1
8375	1	2.0	500	7k	4	0.001	10	11k	100	0.007
8536	1	9.0	500	750	75	0.007	25	1,250	5	0.04
8579	0.1	10.75	5k	250	50	0.7	120	400	7	4.4
6996	0.1	2.0	5k	1,040	25	0.5	100	2k	20	3
8330	0.01	2.0	1k	100	7	0.3	100	200	50	2.1
7325	0.01	3.5	50k	3	200	400	100	5	2	140
5769	0.05	3.5	10k	8	100	4	250	12	3.5	25
8688	0.005	3.5	100k	1.5	25	50	320	1.5	2.5	320
8591	0.001	6.0	500k	0.3	400	15	1k	0.4	1	105

DOUBLE SHIELDED CURRENT CLAMPS

Model	Output (Volts/ Amp)	Hole Id. (inches)	Time Domain Parameters				Frequency Domain Parameters
Model	Output (Volts/ Amp)	Hole Id. (inches)	Peak Curr. (Amps)	Droop (%/ms)	Rise Time (nsec.)	IT Max. (Amp-s)	Max. RMS Curr. (Amps)	3dB pt. Low (Hz)	3dB pt. High (MHz)	I/f (peak Amps /Hz)
7266	1	0.5	500	0.09	10	0.002	5	140	35	0.006
7305	1	1.75	500	0.08	20	0.005	7.5	125	20	0.017
3464	0.1	1.75	5k	0.8	20	0.5	100	1	20	1.7
4936	0.1	0.5	5k	0.9	20	0.2	50	1	20	0.6
5007	0.01	1.75	20k	0.3	20	1	150	0.5	20	3.5
5405	0.01	0.5	50k	6	150	2	150	10	3	12
8574	0.025	1.75	20k	100	100	0.5	100	160	4	3

THIN CURRENT CLAMPS

Model	Output (Volts/ Amp)	Hole Id. (inches)	Time Domain Parameters				Frequency Domain Parameters
Model	Output (Volts/ Amp)	Hole Id. (inches)	Peak Curr. (Amps)	Droop (%/ms)	Rise Time (nsec.)	IT Max. (Amp-s)	Max. RMS Curr. (Amps)	3dB pt. Low (Hz)	3dB pt. High (MHz)	I/f (peak Amps /Hz)
7713-03	1	0.22	100	600	1.5	0.0002	2	1000	250	0.0014
8105-03	0.1	0.22	300	50	10	0.002	6	50	40	0.013
5974	0.1	0.5	5k	1	20	0.15	50	2	20	0.6
8500	0.1	2.0	5k	4	20	0.1	75	10	20	0.6
8445	0.1	2.0	5k	4	20	0.1	75	10	20	0.6
8568	0.01	0.5	25k	0.4	25	0.4	100	0.8	15	2.5
8532	0.01	1.0	10k	0.5	25	0.5	100	0.7	15	3
7765	0.01	2.0	20k	1	25	0.25	150	1	20	1
6535-03	0.005	0.22	5k	1.5	20	0.04	30	2.5	20	0.25

Accuracy ±1%, initial pulse response for all models unless otherwise stated, with a high impedance load such as 1 mΩ in parallel with 20 pF. A 50Ω termination will reduce the output to half.

Droop: For a flat top current pulse, the output voltage declines toward zero. Initially, the decay appears linear and the slope is referred to as the droop rate.

Usable Rise Time: If the 10 to 90% rise time is greater than the specified usable rise time, initial overshoot will be less than 10% of the pulse amplitude.

ǂ = Type N Connector

Pearson Coaxial Current Monitor

Pearson Electronics introduces a new wide band current monitor that allows you to easily measure current within a coaxial cable system. The current monitor can be inserted within a coaxial cable run by means of two BNC connectors.

The Model 6027 has a 3dB bandwidth from 300 Hz to 200 MHz and an rms current rating of 2.5 Amperes.

Accuracy of 1%, or better, is obtainable across the mid-band.

Pulse currents up to 100 Amperes peak and rise times as short as 2 nanoseconds can be viewed faithfully.

Other coaxial designs include ones with HN and triax connectors as well as ones that are double shielded.

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