Features & Benefits
Specific Features
- Interface strain gauge or load cell sensors with Shimmer3 to measure load, weight, force, torque or pressure
- Interface variable resistance sensor with Shimmer for example, temperature sensitive resistor to measure ambient, skin-surface or other temperatures
- Provides excitation source for strain gauge or load cell, meaning no external voltage source is required
- Excitation source and amplifier enable are software controlled, allowing optimisation of power consumption
- Two channels of output from bridge amplifier, providing both low and high gain; low gain is ideal for bipolar inputs, whilst high gain provides additional 3x gain for unipolar load cells
- EEPROM storage device enables expansion board detection and identification, as well as 2032 bytes of data storage available to user.
Benefits over previous generation Strain Gauge
- Bridge Amplifier input for Strain Gauge as well as resistance divider input
- Strain Gauge/Resistance data can be measured simultaneously with 10DOF kinematic data
- Record temperature of skin-surface or ambient temperature with Shimmer3
- Now has use of an on-board EEPROM allows automatic identification of the expansion board
Specifications
Bridge Amplifier+ Unit Includes:
Shimmer3 Bridge Amplifier+ unit x 1
Skin surface temperature pack x1 (3 ina pack)
TTRS pack x 1 (6 in a pack)
Bridge Amplifier Specification overview
- Gain :183.7 ± 1% (Normal Channel), 551 (3x Normal) ± 1% (High Gain Channel)
- Frequency Range1: DC..1kHz (Normal Channel), DC..100Hz (High Gain Channel)
- Common Mode Rejection1: higher than 110dB
- Input Impedance1: 50MOhm
- Input Signal Range: ±7mV, ±2.5mV/V (Normal Channel), 0-4mV, ±1.43mV/V (High Gain Channel)
- Zero-load Noise: 12mV RMS both outputs, < 1% full-scale (Normal Channel), < 0.5% full-scale (High Gain Channel)
- Excitation Voltage: 2.8V ± 5%
- Input Protection: Current limiting, EMI/RF suppression
Resistance Amplifier
- Gain1: 10.1 +/-2%
- Pull-up/Input Impedance: 200kOhms to +3.0V
- Frequency Range1: DC..408Hz (2nd Order)
- Signal Range: 280mV or 20kOhms (1kΩ-20kΩ measurement range recommended)
- Zero-load Noise: 0.1 mV RMS at ouput.
- Connections: Two 3.5mm jacks (headphone type) for 4 conductor shielded cable for Bridge Amplifier and Resistance Amplifier,
- Current Consumption: < 100µA (Excitation disabled), 17mA (Excitation enabled).
- Compact Dimensions 65X32X12mm
- EEPROM memory: 2048 bytes
Applications
- Strength, capacity and force measurement
- Resistance measurement
- Rehabilitation
- Sports training
- Environmental monitoring
- Fall risk assessment (grip strength)
Video
Download / Documentation
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