charge amplifier (hol350)

Sensors, Accesoires

The charge amplifier hol350 enables the connection of vibration acceleration sensors, which have no integrated electronic charge amplifiers. Using ICP® output subsequent evaluation circuits are connected.

The device offers with the high-pass and the antialising-filter the possibility for a direct connection to an AD-card. The sensor input and the ICP® output are galvanically seperated.Through the robust plastic terminal cabinet for the snap rail systems and the easy installation and handling of the amplifier, a high reliability is guranteed.

Application fields: 

At all technical applications in which vibrations occur, the charge amplifier(hol350) is a valuable support. Here some examples:


  • Amplification (processing) of small signals
  • Adaptation of sensors to evaluation circuits with ICP® input       
  • measurement equipment (e.g. oscilloscope) computer interfaces or -cards
Technical Data:

operating voltage:

24V DC +-10%

current consumption:

max. 30mA

temperature range:

0°C to 70°C

degree of protection:

IP 20

case dimensions:

25 x 79,2 x 74mm (B x H x T), without clamps and control panel


ca. 90g


1mV/pC, +-2,5% - 80Hz

frequency range:

1Hz to 100kHz +-0,5dB

max. input signal:


common mode rejection:

> 30dB (1Hz to 50kHz)


ICP®- sink


18 to 28V

output impedance:

<200 Ohm

constant current supply:

2 to 20mA