Strain-Gauge Analog Amplifier

FUTEK Strain-Gauge Analog Amplifiers are signal conditioning modules that take the raw millivolt-level differential bridge output from strain gauge transducers — load cells, torque sensors, pressure transducers, and multi-axis force/torque sensors — and amplify it to a conditioned, buffered analog voltage or current output suitable for direct connection to a PLC analog input, DAQ card, chart recorder, or analog controller without any additional signal processing.

The amplifier provides regulated excitation voltage to the Wheatstone bridge (typically 5V or 10V DC), measures the differential bridge voltage (in the millivolt range proportional to the applied load), amplifies and filters it with a precision instrumentation amplifier circuit, and outputs a calibrated full-scale voltage (0–5V, ±5V, ±10V, or 0–10V) or current (4–20 mA) at its output terminals. Zero and span adjustments allow the user to set the output baseline and scale to match the PLC’s or DAQ’s input range.

FUTEK analog amplifiers are available in several form factors:
– DIN rail modules for mounting in electrical enclosures and control panels
– PCB modules for embedding in OEM equipment or custom housings
– Enclosure-mounted amplifiers with front-panel zero/span controls for benchtop and laboratory use

Key electrical specifications include low noise (important for small-force load cells with mV-level bridge output), high common-mode rejection (to reject electrical interference from motor drives, switching power supplies, and industrial equipment near the sensor Wiring), adjustable bandwidth/filter cutoff for dynamic measurement applications, and high input impedance for compatibility with any strain gauge bridge impedance from 120 Ω to 1 kΩ and above.

NewRoad provides FUTEK analog amplifiers in Israel for integrating FUTEK sensors into industrial PLC control systems, data acquisition systems, and custom test equipment that require a standard analog voltage or current input.