Sercel L-4C Sensor Responses

Coil and shunt resistance values affect the sensitivity, damping and pole values. To calculate poles, zeros and sensitivities for L-4Cs built with other resistor values, click here.


These responses assume that the input resistance of the attached amplifier or datalogger is at least 2 orders of magnitude larger than the shunt resistance. If this is not the case, total damping will not be 70% and the poles will not describe the system accurately.

Manufacturer Model Frequency / Period Coil Resistance Shunt Resistance Sensitivity RESP Filename Source Comments
Sercel L-4C 1 Hz / 1 s 500 Ohms 810 Ohms 51.5 V/M/S RESP.XX.NS153..SHZ.L4C.500.810.1.51_5 Sercel
Sercel L-4C 1 Hz / 1 s 2000 Ohms 3238 Ohms 102 V/M/S RESP.XX.NS154..SHZ.L4C.2000.3238.1.102 Sercel
Sercel L-4C 1 Hz / 1 s 5500 Ohms None 276.8 V/M/S RESP.XX.NS718..SHZ.L-4C_LF1_RC5500_RSNone_SG276.8_STgroundVel Sercel
Sercel L-4C 1 Hz / 1 s 5500 Ohms 8905 Ohms 171 V/M/S RESP.XX.NS155..SHZ.L4C.5500.8905.1.171 Sercel

Mary Templeton 8/23/2022