Product outline

AM32AZ is a general-purpose DC amplifier with a built-in bridge excitation supply for strain gauge sensors. It exhibits power performance for broadband operation (DC -100kHz) achieving high gain (Max. gain: 10000 times), but it has an extremely low drift. Therefore, data precision with every measurement or experiment markedly improves. In addition, AM32AZ has excellent user-friendliness. It is equipped with a calibration function by digital switch which allows easy calibration of either value of voltage or strain amount.


Compatible input resistance 60Ω to 2kΩ
Excitation power supply Voltage: 2.5, 5, 10, 15, 20V DC ±0.2%, Current: max 50mA
Equilibrium adjustment range ±1.5mV/V (excitation voltage 10V)
Input voltage range 0 to ±100mV
Input resistance 10MΩ or more (direct-coupled equilibrium differential)
Voltage amplification Max. 10000 times
Gain adjustment ・ Coarse adjustment: 0, 1/20, 1/10, 1/5, 1/2, 1/1…Error±0.2%
・ Fine adjustment: 1 to 1/6 of each range variable
Zero drift Within ±0.5μV/°C (after a lapse of 30 min. after power ON)
Gain drift Within ±50 ppm/°C of measured value (after a lapse of 30 min. after power ON)
Noise Within 30μVp-p RTI (full band)
Within 2.5μVp-p RTI (1 kHz band)
Within 0.5μVp-p RTI (10 kHz band)
Non-linearity Within ±0.01% FS
Output voltage ・ Voltage output: 0 to ±10V ±5mA, Output resistance: 0.2Ω (BNC connector output)
・ Voltage output: 0 to ±10V ±30mA, Output resistance: 300Ω (binding post output)
Response characteristic DC – 100kHz/ -3dB
High-pass filter (AC mode) 0.5Hz(-3dB) ±15%, -6dB/OCT.
Low-pass filter 1, 10, 100, 1k, 10 kHz (-3dB) ±15% and PASS-12dB/oct, Bessel type
Calibration value Strain calibration: ±1 to 9999 x 10-6 strain, Voltage calibration: ±1 to 9999μV, Setting method: 4-digit digital switch, Accuracy: ±0.2%±0.5x10-6 strain (strain calibration), ±0.5%±5μV (voltage calibration) superimposed on input signal
External control Electronic auto zero function
・ Auto zero range: ±1V (±10V, ±5V, ±2V Please specify when ordering.)
・ Auto zero command: ON and OFF, panel face switch and external signal (negative pulse with a pulse width of 50ms or more)
Operating conditions ・ Working temperature range: 0 to +50°C
・ Humidity: 85% RH or less (non-condensing)
Power supply voltage 100V AC ±10%, 50/60 Hz
Power consumption 10VA typ.
Dimensions 49.5(W)×138(H)×310(D) mm (panel thickness included, but dimensions of protruding parts not included)
Weight Approx. 1.9kg
Attachments ・ AC input cord (1)
・ Spare fuse (0.5A) (1)
・ CA8 (BNC-alligator clip cable 1.5 m) (1)
・ Operation manual (1)

Optional accessories

CA3Y31 (6-core) input cable with PRC connector (3m)
CA451 (6-core) input cable with PRC connector at both ends (5m)
CA7 Coaxial cable with BNC
CA8 Cable with Alligator clip at one end


Product catalogue(PDF)
⇒Download Page
Operation manual(PDF)
External dimension
Support tools