Compact DesignBattery Life Indicator

The Bridge101A is a compact, bridge/strain gauge data logger. Includes standard calibration certificate. Read More >

Key Features:

  • Compact Size
  • Available in 3 Measurement Ranges
  • Memory Capacity of 2,000,000+ Readings

Availability: 2 Weeks


Extended Warranty


The Bridge101A is a compact, data logger that measures and records voltage, and is typically used in conjunction with strain gauges, load cells, and other low-level DC voltage sources. This device is designed to accurately calculate the output of the gauge to determine parameter levels such as stress, torque, strain, and pressure over a period of time.

Available in three different measurement ranges (±30 mV, ±160 mV or ±1200mV), the Bridge101A offers a reading rate of up to 4 Hz with memory capacity of 2,064,384 readings. The device can be configured to start at a specified date and time up to 24 months in advance or by using the push button start/stop feature.

The Bridge101A is compatible with the latest MadgeTech 4 Software making starting, stopping, and downloading simple and easy. Graphical, tabular, and summary data is provided for analysis and can be viewed as customizable engineering units.

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.


Memory2,064,384 readings
Reading Rate4 Hz to 1 every 24 hours
Baud Rate115,200
Battery Life10 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
MaterialABS Plastic
Dimensions1.4 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 PackageIFC200


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


Bridge101A Specification Sheet
Bridge101A Product User Guide

Support Videos

Bridge101A | Changing the Battery


Part Numbers

Bridge101A (±30 mV) — 900019-00
Bridge101A (±160 mV) — 900017-00
Bridge101A (±1200 mV) — 900016-00

The Bridge101A replaces the following product:
Bridge120 (±10 mV) — 900026-00
Bridge120 (±25 mV) — 900029-00
Bridge120 (±100 mV) — 900023-00
Bridge120 (±1000 mV) — 900021-00


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