Bridge101A Data Logger

Bridge/Strain Gauge Data Logger. The Bridge101A supplies a 2.5V excitation voltage and accepts voltage signals from strain gauges, load cells and other low-level, DC voltage sources. Includes NIST traceable calibration certificate.

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The Bridge101A Data Logger measures and records voltage, typically used in conjunction with strain gauges, load cells or other low-level DC voltage sources. This device is designed to accurately measure and record the output of the gauge to determine parameter levels such as stress, torque, strain, and pressure on a structure or item over a period of time.

Available in three different measurement ranges (±30 mV, ±160 mV or ±1200 mV), the Bridge101A offers a reading rate of up to 4 Hz with memory capacity of 1,000,000 readings (memory wrap optional). The device can be configured to start at a specified date and time up to 24 months in advance and the pushbutton start/stop feature allows the user to initiate or cease logging data in the field if desired.

The MadgeTech Data Logger Software offers user programmable Engineering Units which allows collected data to be presented in the established unit being measured. Equipped with endless data analysis and reporting tools, the MadgeTech software simplifies device management and provides the user with graph, tabular or summary reports with the ability to export data to Excel as needed.

Note: MadgeTech recommends using 350 or 1000 Ω strain gauges. 120 Ω strain gauges can be used with the Bridge101A but it is not recommended as it will reduce the battery life, potentially increase noise level and limit the low end temperature operation.



Bridge Range ±30 mv, ±150 mv, ±1000 mv
Bridge Resolution ±30 mV: 1 μV
±150 mV: 5 μV
±1000 mV: 50 μV
Bridge Accuracy ±30 mV: ±0.01 %FSR; ±3 MicroVolts
±150 mV: ±0.01 %FSR; 16 Microvolts
±1000 mV: ±0.01 %FSR; 120 Microvolts


Memory 1,000,000 readings; software configurable memory wrap;
330,000 readings in multiple start/stop
Reading Rate 4 Hz to 1 every 24 hours
Baud Rate 115,200
Battery Life 10 months typical at a 1 minute reading rate with a 350 Ω load
2 years typical at a 1 minute reading rate with a 1000 Ω load
Material ABS Plastic
Dimensions 1.4 in x 2.5 in x 0.6 in (36 mm x 64 mm x 16 mm)
Operating Environment -40 °C to +80 °C (-40 °F to +176 °F), 0 %RH to 90 %RH non-condensing
Required Interface Package IFC200

Nominal Range ±30 ±150 ±1000
Measurement Range ±30 mV ±160 mV ±1200 mV
Resolution 1 μV 5 μV 50 μV
Calibrated Accuracy ±0.01 %FSR;
±3 Microvolts
±0.01 %FSR;
±16 Microvolts
±0.01 %FSR;
±120 Microvolts
Input Range 0 to 2.5 V
Reference Voltage 2.5 V

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