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Charge Amplifiers
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Charge amplifiers convert the charge output by a piezoelectric sensor into a proportional voltage, which is used as an input variable for analysis systems, and can be digitized in an analog-to-digital (A/D) converter if necessary. A charge amplifier basically consists of an inverting voltage amplifier with a high open-loop gain and capacitive negative feedback. It relies on a metal oxide semiconductor field effect transistor (MOSFET) or a junction field effect transistor (JFET) at its input to achieve high insulation resistance and minimize leakage current. If the open-loop gain is sufficiently high, the cable and sensor capacitance can be neglected, leaving the output voltage dependent on just the charge at the charge amplifier input and the range capacitor.
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YMC8101 Miniature Charge Amplifier for industrial Use Rugged, sealed case; with various connection facilities; also available with range adjusted to a specific sensor. Its rugged construction makes it particularly suitable for installation on site in machine monitoring systems. Input: Single or differential input Gain: 1, 10, 100 selectable Sensor Sensitivity Normalization: 1.00 to 10.0 Power Supply: ±12 ~ ±15VDC or +24 to +30VDC Dimensions： 80×50×24 (mm) Weight: 200Gram Frequency Range: 1Hz to 100kHz |
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YMC8102 General Purpose Low Noise Charge Amplifier Multiple Input Mode: Charge/Voltage/IEPE input Max Input Charge: ±106pC Max Input Voltage/IEPE: ±10Vp-p Gain: 0.1 to 1000 Accuracy: ≤1% Sensor Sensitivity Normalization: 1.00 to 10.0 High Pass Filter: 0.3Hz, 1Hz, 3Hz, 10Hz, 30Hz, 100Hz w Pass Filter: 0.3kHz, 1kHz, 3kHz, 10kHz, 30kHz, 100kHz Frequency Range: 0.3Hz to 100kHz Noise (RTI): ≤5μV Power Supply: AC110V60Hz/220V50Hz; +6 to +28V DC single Or ±14 V dual polarity DC Dimensions： 45×122×200mm Weight： 1.3kg |
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YMC8102I Double integrator Charge Amplifier Built-in integrators for displacement and velocity. USES for field and laboratory measurement of vibration in terms of acceleration, velocity and displacement together with piezoelectric accelerometer and voltmeter or measuring amplifier Multiple Input Mode: Charge/Voltage/IEPE input Max Input Charge: ±106pC Max Input Voltage/IEPE: ±10Vp-p Gain: 0.1 to 1000 Accuracy: Acceleration: ≤1%; Velocity: ≤3%; Displacement: ≤5% Sensor Sensitivity Normalization: 1.00 to 10.0 High Pass Filter: Acceleration: 0.3Hz, 1Hz, 10Hz; Velocity: 1Hz, 10Hz; Displacement: 1Hz, 10Hz Low Pass Filter: 0.3kHz, 1kHz, 3kHz, 10kHz, 30kHz, 100kHz Frequency Range: 0.3Hz to 100kHz Noise (RTI): ≤5μV Power Supply: AC110V60Hz/220V50Hz; +6 to +28V DC single Or ±14 V dual polarity DC Dimensions： 45×122×200mm Weight： 1.3kg |
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YMC8103 Multi-channel General Purpose Charge Amplifier Flexible Modular, low cost Channels: 4, 6, 8 Max Input Charge: ±106pC Max Input Voltage/IEPE: ±10Vp-p Gain: 0.1 to 1000 Accuracy: ≤1% Sensor Sensitivity Normalization: 1.00 to 10.0 High Pass Filter: 0.3Hz (Fixed) Low Pass Filter: 0.3kHz, 1kHz, 3kHz, 10kHz, 30kHz, 100kHz Frequency Range: 0.3Hz to 100kHz Noise (RTI): ≤5μV Power Supply: AC110V60Hz/220V50Hz; DC±18VDC Dimensions： 236×132.5 ×300mm (6CH) Weight： 4.5kg (6 channels) |
